2010年10月第26卷增刊1

2010年10月第26卷增刊1

Accession number:20105213523641Title:Assimilation of ground measured wheat leaf area index into CERES-Wheat model based on Kalman Filter
Authors:Liu, Xiangge (1); Liu, Chunhong (1); Wang, Pengxin (1); Xing, Yajuan (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, P.
(wangpx@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:176-181
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:An approach of assimilating ground measured leaf area index (LAI) into the CERES-Wheat model was developed in this paper. The CERES-Wheat model was used to simulate LAI under the Decision Support System for Agro-Technology Transfer (DSSAT) shell. Interpolation methods were used to solve the matching problem of the time scale between dynamic LAI simulated by the CERES-Wheat model and discrete LAI observed on ground. By comparisons, the interpolated LAIs by using cubic interpolation method based on measured LAI data were better than those of using the nearest neighbor interpolation, linear interpolation and cubic spline interpolation methods, respectively, which were assimilated by using Kalman Filter later. The experimental results showed that combination of the interpolation method and the Kalman Filter algorithm had stable and usable results. Assimilation results of LAI are close to their simulated and measured ones, which are better than the LAI data simulated by the model alone.
Number of references:22
Main heading:Interpolation
Controlled terms:Algorithms - Artificial intelligence - Computer simulation - Decision support systems - Decision theory - Kalman filters - Remote sensing - Technology transfer
Uncontrolled terms:Assimilation algorithms - CERES-Wheat - Cubic spline interpolation method - Cubic-interpolation methods - Interpolation method - Kalman filter algorithms - Leaf area index - Linear Interpolation - Matching problems - Model-based - Nearest neighbor interpolation - Time-scales
Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 911.2 Industrial Economics - 921 Mathematics - 921.6 Numerical Methods - 961 Systems Science
DOI:10.3969/j.issn.1002-6819.2010.z1.033
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523613Title:Design for ridge cleaning equipment of no-tillage planter based on Pro/E
Authors:Wu, Shihong (1); Li, Baofa (2)
Author affiliation:(1) College of Information and Electrification, Shenyang Agricultural University, Shenyang 110866, China; (2) College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Wu, S.
(shihong.1@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:18-21
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The residues cutting and ridge cleaning equipment of ridge-tillage planter are important working parts which can prevent no-tillage planter from clogging and ensure good quality of seeding. While ridge cleaning equipment is in operation, the residues often fall onto the neighboring ridge instead of falling into the furrow. So, the factors influenced the motion trace of residues are needed to be analyzed, optimized for making residues fall into the furrow. For this, how to use Pro/E software to establish the simulation model of residues cleaning equipment was introduced, and the simulation analysis of its ridge cleaning was done in this paper. The analysis results showed that the main parameters influenced the motion trace of residues is forward speed v of residue cutting and ridge cleaning equipment, oscillatory speed of level disc and the open-close angle of the back wings of ridge cleaning equipment. By taking different and simulating the level disc and observing the motion of residues, the better location of residues was achieved when v=1.153 m/s and α=60°~120°, which provided the technology support to the design of residues cutting and ridge cleaning equipment of ridge and no-tillage planter.
Number of references:10
Main heading:Cleaning
Controlled terms:Agricultural machinery - Agriculture - Computer simulation - Computer software - Cutting equipment - Kinematics - Machine design - Trace analysis
Uncontrolled terms:Analysis results - Cleaning equipments - Forward speed - Kinematics simulation - Main parameters - No tillage - No-tillage planter - Pro/E - Pro/E software - Ridge cleaning equipment - Simulation analysis - Simulation model - Technology support - Working parts
Classification code:931.1 Mechanics - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 801 Chemistry - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 604.1 Metal Cutting - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.z1.005
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523671Title:High voltage pulsed discharge plasma for extracting polysaccharide from Auricularia Auricula
Authors:Ma, Fengming (1); Wang, Zhenyu (1); Zhao, Haitian (1); Wu, Zhiguang (1)
Author affiliation:(1) School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; (2) College of Forestry, Northeast Forestry University, Harbin 150090, China
Corresponding author:Wang, Z.
(wzy219001@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:363-368
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:For the sake of developing new techniques of extraction. High voltage pulsed discharge plasma (HVPDP) for extracting polysaccharide from Auricularia Auricula was studied. Through single factor experiment, there were three factors screened, i. e. pulsed discharge voltage, ratio of material to solvent, and discharge time. the technique conditions were optimized by response surface method, and HVPDP for extracting was discussed. The results showed that the optimal polysaccharides extraction conditions were pulsed discharge voltage 40.3 kV, ratio of material to solvent 40.3, discharge time 4.1 min. Under the conditions, the extraction rate of polysaccharides from Auricularia Auricula was 8.80%. The special feature of HVPDP technique over traditional extraction was short time, low energy consumption and high extraction ratio. The work indicated that extracting polysaccharide from Auricularia Auricula with HVPDP is feasible, and it will provide a base for extracting effective Ingredient with HVPDP.
Number of references:24
Main heading:Feature extraction
Controlled terms:Electric discharges - Energy utilization - Optimization - Plasma theory - Polysaccharides
Uncontrolled terms:Auricularia auricula - Discharge time - Extraction conditions - Extraction rate - Extraction ratio - High voltage - Low energy consumption - Pulsed discharge - Pulsed discharge plasmas - Response surface method
Classification code:525.3 Energy Utilization - 701.1 Electricity: Basic Concepts and Phenomena - 716 Telecommunication; Radar, Radio and Television - 804.1 Organic Compounds - 921.5 Optimization Techniques - 932.3 Plasma Physics
DOI:10.3969/j.issn.1002-6819.2010.z1.064
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523633Title:Optimal regional agricultural planting structure under virtual water strategy
Authors:Liang, Meishe (1); Wang, Zhengzhong (1)
Author affiliation:(1) Research Center of Water Engineering Safety and Disaster Prevention, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Science, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Wang, Z.
(wangzz0910@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:130-133
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In the past, the research of optimal allocation of irrigation of water resources was focused on the economic benefits. It had ignored the social and ecological benefits, and was not suitable for the extremely fragile and arid areas of northwest. Based on the idea of the original optimization model, this paper proposed the virtual water strategy optimization model of regional agricultural structure by setting up the rigidity constraints for local production, living conditions and water demanding to environmental improvement. Then, Minqin County was taken as an example. The results showed that the food crop acreage decreased, the vegetable crop area increased significantly with the coefficient of virtual water trade increasing. Its economic efficiency and water-use efficiency were markedly improved, and the food dependency also would be gradually increased. The trading foundation and water-saving technology could ensure the food security. Saved valuable water resource was conducive to the improvement of the ecological environment in drought region. Solving the optimization program will be helpful to develop a rational and effective policy of industrial restructuring.
Number of references:18
Main heading:Optimization
Controlled terms:Arid regions - Crops - Ecology - Food supply - Mathematical models - Water conservation - Water management
Uncontrolled terms:Arid area - Ecological benefits - Ecological environments - Economic benefits - Economic efficiency - Environmental improvements - Food crops - Food security - Industrial restructuring - Living conditions - Local production - Minqin County - Optimal allocation - Optimization models - Optimization programs - Planting structure - Rigidity constraint - Strategy optimization - Vegetable crops - Virtual water - Virtual water trade - Water security - Water use efficiency - Water-saving
Classification code:921 Mathematics - 821.4 Agricultural Products - 454.3 Ecology and Ecosystems - 921.5 Optimization Techniques - 446 Waterworks - 443 Meteorology - 404.2 Civil Defense - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z1.025
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523645Title:Risk assessment model of snow disaster in Qinghai Province based on GIS
Authors:Fu, Yang (1); Xiao, Jianshe (1); Xiao, Ruixiang (1); Sa, Wenjun (2); Li, Fengxia (1); Zhao, Huifang (1)
Author affiliation:(1) Qinghai Meteorological Science Institute, Xining 810001, China; (2) Foreign Affairs Office, Agricultural and Animal Husbandry Bureau of Qinghai, Xining 810008, China
Corresponding author:Fu, Y.
(fuyang_hao@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:197-205
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The risk zoning of geography distribution based on the establishment of risk assessment model of snow disaster was provided to carry out the evaluation and monitoring of snow disaster rapidly and accurately in large area. According to the basic GIS data of Qinghai Province, the hazards inducing environment background data, such as gradient and slope, vegetation etc. in the grid of 91.7 m×91.7 m were taken to analyze the geographic condition of snow disaster formation based on the basic measure unit of county. The risk indexes of snow disaster scale, frequency and density which will cause the disaster have been collected for statistic analysis. The people density, economy density, traffic density and richness of land source were selected as the factor of vulnerability assessment, which would provide the accurate information to forecasting and discriminating of snow disaster. The ArcGIS software was used to set up the comprehensive quantitative risk assessment model for snow disaster in Qinghai livestock region. The susceptibility of hazard inducing environment, risk hazardous, vulnerability assessment of sustaining hazard body have been gotten by operating the graphic data base. Finally the regional map of risk management of snow disaster in Qinghai Province was obtained through overlay algorithm of hierarchical maps and plaque combination, class hierarchy. The research results can help to take the effective measurement of risk management to reduce the disaster loss before winter, and it is also very important to keep the sustainable livestock development. The research results can also provide scientific basis to work out the pre-disaster planning and disaster relief strategic decision of post-disaster, and also can provide reference value to other province in risk evaluation of snow disaster.
Number of references:28
Main heading:Risk assessment
Controlled terms:Agriculture - Disaster prevention - Geographic information systems - Rating - Research and development management - Risk analysis - Risk management - Risk perception - Snow - Zoning
Uncontrolled terms:Assessment models - CIS - Class hierarchies - Data base - Disaster relief - Geographic conditions - GIS data - Hierarchical maps - Pre-disaster planning - Qinghai Province - Quantitative risk assessment - Reference values - Research results - Risk evaluation - Risk zoning - Snow disaster - Statistic analysis - Strategic decisions - Sustaining hazard body - Traffic densities - Vulnerability assessments
Classification code:922 Statistical Methods - 914.1 Accidents and Accident Prevention - 914 Safety Engineering - 912.2 Management - 912 Industrial Engineering and Management - 922.1 Probability Theory - 911 Cost and Value Engineering; Industrial Economics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.3 Database Systems - 443.3 Precipitation - 403.2 Regional Planning and Development - 902.2 Codes and Standards
DOI:10.3969/j.issn.1002-6819.2010.z1.037
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523658Title:Effects of different modifiers on Cd pollution of lettuce
Authors:Li, Hongjuan (1); Zhao, Yong (1); Wang, Qian (1); Sun, Zhiqiang (1)
Author affiliation:(1) Forestry College, Henan Agricultural University, Zhengzhou 450002, China; (2) Environment Engineering Design Institute, China Railway Engineering Consultants Group, Zhengzhou 450052, China
Corresponding author:Zhao, Y.
(zhaoyonghnnd@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:285-291
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Taking fly ash, peat, chicken manure, silicon fertilizer, superphosphate and calcium magnesium phosphate as modifiers, and planting lettuce in Cd polluted soil, this paper studied the effects of modifiers on the Cd polluted soil, in order to find out the practical and feasible modifier scheme. The results showed that complex modifiers was better than corresponding pure modifiers clearly as to vegetable biomass and Cd mass fraction in edible part. The improvement effects for Cd pollution in soil from high to low were: fly ash+ superphosphate> superphosphate> fly ash+ chicken manure > calcium magnesium phosphate >fly ash+ peat >silicon fertilizer> chicken manure> fly ash > peat. Different modifiers had obviously different effects on lettuce biomass and Cd mass fraction, whereas the quantity of the modifiers had not that obviously different effects. Modifier type and quantity didn't affect soil pH. The effect was the best when the ratio of fly ash and superphosphate was 5:1.
Number of references:23
Main heading:Cadmium
Controlled terms:Agricultural products - Animals - Calcium phosphate - Fertilizers - Fly ash - Magnesium - Manures - Peat - pH effects - Phosphates - Soil pollution - Soils
Uncontrolled terms:Cd - Chicken manure - Different effects - High-to-low - Lettuce - Magnesium phosphates - Mass fraction - Modifiers - Polluted soils - Soil pH - Vegetable biomass
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 804 Chemical Products Generally - 801.1 Chemistry, General - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 822 Food Technology - 549.2 Alkaline Earth Metals - 503 Mines and Mining, Coal - 483.1 Soils and Soil Mechanics - 471 Marine Science and Oceanography - 461 Bioengineering and Biology - 524 Solid Fuels
DOI:10.3969/j.issn.1002-6819.2010.z1.051
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523652Title:Monitoring corn FPAR based on HJ-1 CCD
Authors:Chen, Xueyang (1); Meng, Jihua (1); Wu, Bingfang (1); Zhu, Jianjun (3); Du, Xin (1); Zhang, Feifei (1); Niu, Liming (1)
Author affiliation:(1) Institute of Remote Sensing Applications, Chinese Acad. of Sci., Beijing 100101, China; (2) Chongqing Geographic Space Information Engineering Technology Research Center, Chongqing 401121, China; (3) Central South University, Changsha 410083, China
Corresponding author:Meng, J.
(mengjh@irsa.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:241-245
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on the China environment and disaster reduction satellite data from Yucheng study area in Shandong Province, the four vegetations (NDVI, RVI, SAVI, and EVI) were calculated. The estimation precision of the four vegetation indexes model for the summer maize was compared by the regression analysis of the vegetation indexes with the survey data and integrated the synchronization observation data. The results indicated those vegetation indexes with high relation to FPAR; the NDVI was the top inversion precision, the optimum model to estimate the summer maize was FPAR, the model validation mean error was 3.8%. That is, the model with high precision and using the model to inverse the September FPAR of Yucheng research region in Shandong Province.
Number of references:16
Main heading:Vegetation
Controlled terms:Crops - Grain (agricultural product) - Regression analysis
Uncontrolled terms:Corn - Disaster reduction - FPAR - High precision - HJ-1 - Mean errors - Model validation - Observation data - Optimum model - Satellite data - Shandong province - Study areas - Summer maize - Survey data - Vegetation index
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.z1.044
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523623Title:Simulation of operator head injury and protection for engineering vehicles in rollover accident
Authors:Si, Junde (1); Wang, Guoqiang (1); Cui, Guohua (2); Wang, Jixin (1); Zhang, Yingshuang (1)
Author affiliation:(1) College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China; (2) Institute of Mechanical Engineering, Hebei Engineering University, Handan 056038, China
Corresponding author:Zhang, Y.
(hazys_jlu@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:67-70
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:When a certain engineering vehicle roll in the sloped area, the impact of the cab interior structure against operator's head will probably cause a serious hurt. As a result, the research on the mechanical response characters of operator's head in the collision accidents was practically significant. In this paper, 3-D finite element modeling technology was adopted to develop the adult headform. The headform was used to analyze the impact on the cab interior structure with virtual test method, and the effect of different densities and thickness of the polyurethane foam on the head injury evaluation criteria was compared. The result showed that the polyurethane foam of 18 mm thickness in the cab interior could effectively decrease the head injury value in the secondary collision when the operator was involved in engineering vehicle roll-over. The HIC(d) value decreases as an increase of the foam thickness, and the effect of the foam density variable is nonlinear, a second order parabolic shape can be identified.
Number of references:16
Main heading:Models
Controlled terms:Accidents - Dynamic response - Flight dynamics - Rigid foamed plastics - Three dimensional - Vehicles
Uncontrolled terms:Engineering vehicles - Evaluation criteria - Finite element modeling - Foam densities - Foam thickness - Head impact - Head injuries - Interior structure - Mechanical response - Polyurethane foam - Rollover accidents - Second orders - Simulation - Virtual tests
Classification code:408.1 Structural Design, General - 432 Highway Transportation - 817.1 Polymer Products - 902.1 Engineering Graphics - 914.1 Accidents and Accident Prevention - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2010.z1.015
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523625Title:Mathematical models of crossflow grain drying and their applications
Authors:Hu, Zhichao (1); Wang, Haiou (1); Xie, Huanxiong (1); Wu, Feng (1); Chen, Youqing (1); Cao, Shifeng (1)
Author affiliation:(1) Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author:Hu, Z.
(nfzhongzi@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:76-82
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Mathematical models of crossflow grain drying and their applications were overviewed with the intention of providing some references for the similar research in our country. Three mathematical models for crossflow drying by researchers of USA were introduced in detail, including Bakker-Arkema PDE(partial differential equation) model, two-dimensional dynamic PDE model, DP(distributed parameter) process model. Model predictive control method and its applications in continuous crossflow grain dryer were also presented in this paper. DP process model, as a simplified form of PDE model, can perfectly simulate the drying process. DP model has simple analog computational procedure, being fitting for the online control of grain dryer. Based on the DP process model and MPC control algorithm, American researchers developed a model-predictive controller which was successfully applied on crossflow tower-dryer.
Number of references:36
Main heading:Mathematical models
Controlled terms:Algorithms - Curing - Differential equations - Dryers (equipment) - Drying - Model predictive control - Predictive control systems - Research
Uncontrolled terms:Computational procedures - Control algorithms - Cross flows - D-p model - Distributed parameter - Drying process - Grain - Grain drying - Model Predictive Control methods - On-line controls - PDE model - Predictive controller - Process model
Classification code:921.2 Calculus - 921 Mathematics - 901.3 Engineering Research - 815.1 Polymeric Materials - 802.1 Chemical Plants and Equipment - 732 Control Devices - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 642.1 Process Heating
DOI:10.3969/j.issn.1002-6819.2010.z1.017
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523679Title:Seed characteristics and hard seed broken methods of Sophora alopecuroides and Thermopsis lanceolata
Authors:Wang, Jin (1); Lü, Biao (1); Xiao, Zhanwen (1); Yan, Jizhi (1); Zhang, Youfu (1)
Author affiliation:(1) College of Agronomy, Hexi University, Zhangye 734000, China
Corresponding author:Lü, B.
(lvbiao@hxu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:406-410
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The sharp, color and surface state of Sophora alopecuroides and Thermopsis lanceolata seeds collected from desert edge were researched in laboratory. The results showed that sharp, color, appearance had significant difference. Strong degree and hard seed rate were higher, but the water content was lower. The length of Sophora alopecuroides was larger than that of Thermopsis lanceolata, but the bulk density and TGW of Thermopsis lanceolata seeds were higher than that of Sophora alopecuroides seeds. The width, thickness and bulk density had no significant difference. Hard seed and non-hard seed were all existed together in fresh and pure bean seeds. The best hard seed release methods for Sophora alopecuroides and Thermopsis lanceolata were treating seeds using 90% (v/v) sulfuric acid for 70min and 120min respectively. Sophora alopecuroides and Thermopsis lanceolata seeds had higher materials convert efficiency and reached to 77.94% and77.28%, respectively. Sophora alopecuroides and Thermopsis lanceolata seeds didn't germinate until 21 h and the lowest water requirement was 151.05% and 151.71%, respectively. They needed more water to germinate. Sophora alopecuroides seeds had a fast germination speed and needed 40 h to reach maximal germination value, and Thermopsis lanceolata needed 56 h to reach that value.
Number of references:19
Main heading:Seed
Controlled terms:Research - Sulfuric acid - Water content
Uncontrolled terms:Bulk density - Germination rates - Seed rate - Seed release - Sophora alopecuroides - Surface state - Thermopsis lanceolata - Water requirements
Classification code:444 Water Resources - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.z1.072
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523662Title:Influence of different film packaging on storage and shelf-life quality of Pumelo fruit
Authors:Li, Jiazheng (1); Bi, Dapeng (1)
Author affiliation:(1) Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, National Engineering and Technology Research Center for Preservation of Agricultural Products, Tianjin 300384, China
Corresponding author:Li, J.
(lijzh163@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:315-319
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To enhance the cool storage effects by package with proper film, fruits of Pumelo (Citrus grandis (L.) Osbeck. cv. Miyou) were individually packed with micro-perforation film and common PE (polyethylene) films with different thickness, and stored at 5-6°C for 4 months and then 15-days shelf-life at room temperature. O<inf>2</inf> and CO<inf>2</inf> composition in headspace of different bags were checked, and fruit weight loss, content of chemical quality attributes (total soluble solid, titratable acid and vitamin C), firmness and ethanol content of flesh were measured. There were higher O<inf>2</inf> and lower CO<inf>2</inf> content in headspace of packaging with micro perforations film. During the experimental period, pumelo packed with micro perforations film were characterized with highest weight losses, but contained highest chemical quality attributes, lowest firmness of flesh, the least ethanol content, and enjoyed best flavor among all treatments. After 15-day shelf-life, the weight losses and ethanol content of fruit in all treatment increased sharply, meanwhile the TSS and TA decreased rapidly. Packaging with micro-perforation film is a good choice to keep better storage and shelf-life quality of pumelo.
Number of references:27
Main heading:Quality control
Controlled terms:Ethanol - Fruits - Packaging
Uncontrolled terms:Chemical quality - Citrus grandis - Cool storage - Different thickness - Fruit weight loss - Headspaces - Micro-perforations - Room temperature - Shelf life - Storage - Titratable acid - Total soluble solids - Vitamin C - Weight loss
Classification code:523 Liquid Fuels - 694.1 Packaging, General - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.z1.055
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523629Title:Soil moisture distribution in different cultivating systems in mountainous area of south Ningxia Hui Aotonomous Region
Authors:Zhang, Lei (1); Zhang, Xiaoyu (1); Wei, Jianguo (1); Han, Yingjuan (2); Cao, Ning (2)
Author affiliation:(1) Ningxia Key Lab. for Meteorological Disaster Prevention and Reduction, Yinchuan 750002, China; (2) Ningxia Meteorological Science Institute, Yinchuan 750002, China
Corresponding author:Zhang, L.
(zhle.131@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:104-108
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The study of soil moisture distribution of dry land crops can supply scientific evidences for water resource use. The article studied dynamic changes of soil water of five kinds dry land- winter wheat, flax, potato, alfalfa and natural grass in different stages. The results showed that temporal variations of soil moisture on different dry land crops were similar. All five kind crops include "soil moisture content raising period" and "soil moisture content declining period", that dividing line were at the middle of July. Soil moisture of annual crops (as winter wheat, flax and potato) were more higher perennial crop (as alfalfa and natural grass) in whole growing time. The soil moisture vertical distribution of winter wheat, flax and potato were 'topsoil highness, subsoil lowness', alfalfa and natural grass in reverse. Topsoil moisture movement was obvious, subsoil moisture movementwas inconspicuous all dry crops. In growing time, rainfall didn't satisfy the all crops needs. The raising soil moisture in autumn is pivotal for harvest of dry crops.
Number of references:15
Main heading:Moisture determination
Controlled terms:Crops - Cultivation - Flax - Flow of water - Linen - Moisture meters - Soil moisture - Underwater soils - Water resources - Yarn
Uncontrolled terms:Declining period - Dry land - Dynamic changes - Moisture movement - Mountainous area - Natural grass - Perennial crops - Raising period - Scientific evidence - Soil moisture content - Soil moisture distribution - Soil water - Southern Ningxia - Temporal variation - Vertical distributions - Winter wheat
Classification code:944.1 Moisture Measuring Instruments - 821.4 Agricultural Products - 821.3 Agricultural Methods - 944.2 Moisture Measurements - 819 Synthetic and Natural Fibers; Textile Technology - 483.1 Soils and Soil Mechanics - 444 Water Resources - 631.1.1 Liquid Dynamics
DOI:10.3969/j.issn.1002-6819.2010.z1.021
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523663Title:Effects of ambient temperatures on viscometric change of ultra-high temperature processed cow milk
Authors:Hang, Feng (1); Guo, Benheng (1); Ren, Lu (1); Gong, Guangyu (1); Wang, Yinyu (1); Chen, Wei (2); Zhang, Hao (2)
Author affiliation:(1) State Key Laboratory of Dairy Biotechnology, Technology Center, Bright Dairy and Food Company Limited, Shanghai 200436, China; (2) State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
Corresponding author:Guo, B.
(fhang0427@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:320-324
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The viscosity of ultra-high temperature (UHT) processed cow milk changing with temperature in the range of 20°C to 45°C were determined by TA AR-G2 rheometer and the data were fitted by 1stOpt1.5 Pro software, in order to evaluate the applicability of Arrhenius model to describe the course, explore the influence of ambient temperature on the shelf-life based on Stokes' law and establish theoretical basis of accelerated shelf-life testing for UHT milk. The results showed that, in the range of 20°C to 45°C, the viscosities of UHT milk slightly increased from 20°C to 25°C and then significantly decreased as the temperature rising, however gradually increased during cooling from 45°C to 20°C. The fittness of Arrhenius model to describe the viscosity changes during heating was significantly affected by weak gel formed between K-carrageenan and casein. When temperature was elevated to 25°C, the weak gel was disrupted and thereafter the viscosity changes of the system obeyed Arrhenius model well (R2=908). The viscosity changes during cooling also followed Arrhenius model (R2=0.942). Hence, Arrhenius model is fit for describing the temperature-dependency viscosity changes in the UHT cow milk.
Number of references:21
Main heading:Viscosity
Controlled terms:Gels - Temperature - Viscometers
Uncontrolled terms:Ambient temperatures - AR-G2 rheometer - Arrhenius models - Carrageenans - Cow milk - Shelf life - Stokes' law - Temperature dependencies - Temperature rising - Theoretical basis - UHT milk - Ultrahigh temperature - Weak gel
Classification code:631.1 Fluid Flow, General - 641.1 Thermodynamics - 804 Chemical Products Generally - 943.3 Special Purpose Instruments
DOI:10.3969/j.issn.1002-6819.2010.z1.056
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523676Title:Optimization of preparation process of cold brew tea by explosion puffing drying at variable temperature and pressure difference
Authors:He, Xinyi (1); Liu, Jinfu (1); Huang, Zonghai (1); Nie, Xiaohua (3); Zhang, Lijin (1); He, Fengchao (1); Chen, Ying (1)
Author affiliation:(1) Department of Food Science, Tianjin Agricultural University, Tianjin 300384, China; (2) Tianjin Agricultural Products Processing Scientific Innovation and Achievement Transform Base, Tianjin 300384, China; (3) College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Corresponding author:Liu, J.
(f123@tjau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:388-393
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to optimize the explosion puffing drying preparation process of cold brew tea at variable temperature and pressure difference, the influence of the moisture content, freezing treatment times and puffing temperature on the cold brew tea was studied. Single factor experiments and orthogonal experiments were carried out, and the experimental results indicated that the importance of the affecting factors were in the order of the moisture content, freezing treatment times and puffing temperature. The optimum explosion puffing drying preparation process was designed as follows: 50% of moisture content, three times freezing treatments at -18°C, 24 h each time, puffing treatment at 115°C. Under this optimized process condition, the cold brew tea was obtained and then soaked for another 30min at room temperature. Finally, the determination of the biochemistry ingredients of cold brew tea solution suggested that the water extract mass fraction, caffine mass fraction, tea polyphenols mass fraction, free amino acid mass fraction, water-soluble saccharides mass fraction reached to 16.45%, 0.84%, 11.45%, 0.93%, 2.47%, respectively. Results showed that biochemistry ingredients of cold brew tea prepared by explosion puffing drying at variable temperature and pressure difference were easy to extract. This research provides technical support for industrialization production of the cold brew tea.
Number of references:20
Main heading:Parameter estimation
Controlled terms:Amino acids - Biochemistry - Curing - Drying - Experiments - Explosions - Explosives - Freezing - Moisture - Moisture determination - Optimization - Phenols - Pressure control - Solvent extraction - Sugars
Uncontrolled terms:Affecting factors - Cold brew tea - Free amino acids - Freezing treatments - Mass fraction - Moisture contents - Optimized process - Orthogonal experiment - Preparation process - Pressure differences - Puffing - Room temperature - Tea polyphenols - Tea solution - Technical support - Variable temperature - Water extracts
Classification code:944.2 Moisture Measurements - 921.5 Optimization Techniques - 901.3 Engineering Research - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 801.2 Biochemistry - 731.3 Specific Variables Control - 731.1 Control Systems
DOI:10.3969/j.issn.1002-6819.2010.z1.069
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523626Title:Effects of ground coverage measure and water quality on soil water salinity distribution and helianthus yield
Authors:Bi, Yuanjie (1); Wang, Quanjiu (1); Xue, Jing (1)
Author affiliation:(1) Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Acad. of Sci., Yangling 712100, China
Corresponding author:Wang, Q.
(wquanjiu@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:83-89
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to analyze the effect of soil surface mulching measures and different salinity of irrigation water on soil water salinity distribution and helianthus yield, soil water and salinity distributional characteristics, part of physiologic index and yield of helianthus were studied with different salinity of irrigation water under the conditions of straw mulching and plastic mulching compared with the treatments without ground coverage. The results showed that the measures of straw mulching and plastic mulching could decrease soil evaporation effectively and depress surface salt accumulation degree of helianthus taproot layer regardless with fresh water or saline water for irrigation. Under different ground coverage measure, the change rule of soil average moisture content of helianthus taproot layer with the salinity of irrigation water was different. And the yield of helianthus of the treatment with ground coverage measure was usually larger than that without ground coverage under the same salinity of irrigation water. As a result, it is necessary to take ground coverage measure when irrigating with saline water.
Number of references:16
Main heading:Saline water
Controlled terms:Irrigation - Salinity measurement - Soil moisture - Underwater soils - Water content - Water pollution - Water quality - Water supply
Uncontrolled terms:Fresh Water - Helianthus - Irrigation waters - Moisture contents - Mulching measures - Plastic mulching - Soil surfaces - Soil water - Straw mulching
Classification code:444 Water Resources - 446.1 Water Supply Systems - 453 Water Pollution - 453.2 Water Pollution Control - 483.1 Soils and Soil Mechanics - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.z1.018
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523632Title:Effects of water and nitrogen conditions on the diurnal variation of photosynthesis and yield of cucumber in greenhouse
Authors:Li, Yinkun (1); Wu, Xueping (1); Wu, Huijun (1); Wu, Qipu (1); Zhang, Yancai (2); Li, Ruonan (2); Wang, Liying (2)
Author affiliation:(1) Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agricultural of China, Institute of Agricultural Resource and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Institute of Agricultural Resource Environment, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050051, China
Corresponding author:Wu, X.
(xpwu@caas.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:122-129
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The major variation of greenhouse environmental factors and diurnal variation of photosynthesis of cucumber leaves and its relationship with yield were studied by designing different irrigation and nitrogen treatments in the greenhouse of North China. The results showed that the diurnal variation curves of PAR, Ta, RH and other environmental factors had a single-peak and the net photosynthetic rate and stoma conductance of cucumber leaves under different water and nitrogen conditions had two peaks. There was an obvious midday depression of photosynthesis and the stomata were the main limiting factors. The relationship between photosynthetic rate and yield of cucumber showed a quadratic curve. With moderately reduced water and nitrogen application rate, the net photosynthetic rate of cucumber did not decrease significantly, while the instantaneous leaf water use efficiency increased significantly. In our experiment, the highest yield was achieved with an irrigation quantity of 5190 m3/hm2 and nitrogen amount of 600 kg/hm2. Such practice can make the yield increase by 4.21 percent compared to the habitual water and nitrogen treatment. The general analysis showed that the optimization of water and nitrogen treatment resulted in a more rational management. This practice not only achieved a higher net photosynthetic rate and water use efficiency, but also a higher cucumber yield.
Number of references:37
Main heading:Nitrogen fertilizers
Controlled terms:Greenhouses - Irrigation - Nitrogen - Photosynthesis - Water supply - Water treatment
Uncontrolled terms:Cucumber - Diurnal variation - Environmental factors - Leaf water - Limiting factors - Net photosynthetic rate - Nitrogen application rates - Nitrogen treatment - North China - Photosynthetic rate - Quadratic curves - Water use efficiency - Yield - Yield increase
Classification code:445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 741.1 Light/Optics - 804 Chemical Products Generally - 821.3 Agricultural Methods - 821.6 Farm Buildings and Other Structures
DOI:10.3969/j.issn.1002-6819.2010.z1.024
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523646Title:Reconstructing MODIS vegetation index time-series data of cropping area
Authors:Hou, Dong (1); Pan, Yaozhong (1); Zhang, Jinshui (1); Liang, Shunlin (3); Zhu, Wenquan (1); Li, Le (1); Li, Lingling (1)
Author affiliation:(1) College of Resource Sciences and Technology, Beijing Normal University, Beijing 100875, China; (2) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; (3) Department of Geography, University of Maryland, College Park, MD 20742, United States
Corresponding author:Hou, D.
(houdong@ires.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:206-212
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:As an excellent dataset which reflects the coverage of vegetation on earth surface continuously, MODIS vegetation index time series have already become an important data source in crop measurement by remote sensing. However, there are always some noises caused by atmosphere variability and sensor angle in MOD13 vegetation product. For this reason, the time series of MOD13 should be reconstructed before application. According to phenology and cropping system, time series were separated into different periods related to the growth process of crops. Then, the vegetation indices in each period were reconstructed based on asymmetric gaussian function. After all periods were reconstructed, the indices in overlapping range between two adjacent periods were optimized. The above two procedures were repeated a certain times to restore the indices affected by noises. The proposed method were applied to reconstruct the NDVI time series of cropping area lies between Tong zhou District, Beijing, and Baoding City, HeBei Province with MOD13 data acquired in 2005. The same data were reconstructed by two step Savitzky-Golay filter. The comparison between two results show that the noise in time series can be evaluated and restored accurately. Meantime, the low vegetation indices caused by double cropping system are reserved effectively. The whole reconstructed NDVI time series can indicate vegetation coverage accurately.
Number of references:18
Main heading:Vegetation
Controlled terms:Crops - Forestry - Gaussian distribution - Radiometers - Remote sensing - Restoration - Time series
Uncontrolled terms:Cropping area - Cropping systems - Gauss function - MODIS time series reconstruction - Penology
Classification code:402 Buildings and Towers - 409 Civil Engineering, General - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2 Mathematical Statistics - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.z1.038
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523610Title:Current situation and development trend of mechanization of field experiments
Authors:Shang, Shuqi (1); Yang, Ranbing (1); Yin, Yuanyuan (1); Guo, Peiyu (2); Sun, Qun (2)
Author affiliation:(1) College of Electromechanical Engineering, Qingdao Agricultural University, Qingdao 266109, China; (2) China Agricultural University, Beijing 100083, China
Corresponding author:Shang, S.
(sqingnong@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:5-8
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Mechanization of field experiments is the only way to improve crop breeding and seed propagation effects. It can not only improve the efficiency of field trials, save investment, shorten the breeding cycle, but also provide a better technology and equipment for the breeding of new varieties and propagation. In order to improve the breeding of field tests of the operating efficiency of machinery and precision, to the breeders and seed base to provide the best machinery, equipment and apparatus, in the joint efforts of international breeders, agronomists and mechanical scientists, the International Association on Mechanization of Field Experiments (IAMFE) was established in 1964. At the beginning of this paper, a brief introduction of the history of the IAMFE and the China Branch was given. Then the fields engaged was described, the scope of the study, the achievements and the international development of IAMFE were discussed in detail. Finally, a prospect of the development of the IAMFE was given.
Number of references:14
Main heading:Equipment
Controlled terms:Agricultural machinery - Experiments - Mechanization
Uncontrolled terms:Breeding - Current situation - Development trends - Field experiment - Field test - Field trial - International Association - International development - Operating efficiency - Plot combine - Plot seeder - Seed propagation
Classification code:601 Mechanical Design - 821.1 Agricultural Machinery and Equipment - 901 Engineering Profession - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.z1.002
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523649Title:Extracting winter wheat planting area based on cropping system with MODIS data
Authors:Sui, Xueyan (1); Zhu, Zhenlin (1); Li, Shaokun (2); Ming, Bo (2); Zhang, Xiaodong (1); Sun, Xiaoqing (1)
Author affiliation:(1) Shandong Academy of Agriculture Sciences, Jinan 250100, China; (2) Key Laboratory of Crop Physiology and Production Ministry of Agriculture, Institute of Crop Sciences, Chinese Academy of Agriculture Sciences, Beijing 100081, China; (3) Key Laboratory of Oasis Ecology Agriculture of Xinjiang Construction Crops, Center of Crop High-Yield Research, Shihezi 832003, China
Corresponding author:Li, S.
(Lishk@mail.caas.net.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:225-229
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Winter wheat is one kind of important crop in China. Its planting area is one key element to explain yield change. To obtain winter wheat planting area as soon as possible can provide scientific reference for our country to make related policy. Based on the cropping system in Shandong Province, winter wheat is divided into two kinds "winter wheat sowed by machine-maize" and "labour broadcast winter wheat-rice". Using MODIS data, NDVI characters of winter wheat, garlic, greenhouse vegetable, from sowing till overwintering stage were analyzed. Together with NDVI characters of former stubble crops in middle September, extracting requirements were set up for winter wheat planting area which was sown by machine this year. In view of the spectrum similarity between rice wheat and greenhouse vegetable from sowing stage till overwintering stage, rice wheat planting area of former year was extracted relying on the character of biomass rapid growth at jointing stage. Because of the "labour broadcast winter wheat-rice" cropping system is very fixed in Shandong Province, then the rice wheat planting area of former year can take the place of the rice wheat planting area this year. Two kinds of winter wheat area were merged, and tested by 284 groups of located spots data, with the accuracy reached 94.01%. It is feasible to extract winter wheat area before overwintering stage, and the time is 4 months earlier than using jointing stage NDVI.
Number of references:22
Main heading:Crops
Controlled terms:Ecology - Greenhouses - Radiometers - Remote sensing - Vegetables
Uncontrolled terms:Area - Classification - Rice wheat - Shandong province - Winter wheat
Classification code:454.3 Ecology and Ecosystems - 731.1 Control Systems - 821.4 Agricultural Products - 821.6 Farm Buildings and Other Structures - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.z1.041
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523667Title:Variation of postmortem lamb quality and its influencing factors in different store temperatures
Authors:Li, Ze (1); Jin, Ye (1); Ma, Xia (1)
Author affiliation:(1) College of Food Science and Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
Corresponding author:Li, Z.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:338-342
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to research the effect of AMPK activation degree on glycolysis, and further on meat quality, the mechanism of postmortem maturation was analyzed. The postmortem lamb preservated at 0, 4 and 15°C, AMPK activity, muscle glycogen, pH value and lactic acid were measured at 0-24 h after preservation, and shearing force, cooked meat percentage, myofibril fragmentation index (MFI) and meat color were measured at 0-7 d after preservation. The results showed that the lamb muscle which were preservated at 15°C had the maximum AMPK activity (P<0.05), fast decreasing speed of glycogen and pH value, more lactic acid accumulation, rapid speed of shearing force rally and cooked meat percentage drawdown, higher MFI and worse meat color. This showed much higher preservation temperature, more easily AMPK activation and rapidly glycolysis and mature speed of postmortem lamb.
Number of references:16
Main heading:Meats
Controlled terms:Body fluids - Lactic acid - Muscle - Pathology - pH - Shearing - Temperature control
Uncontrolled terms:AMPK - AMPK activity - Cooked meat - Fragmentation index - Influencing factor - Meat color - Meat quality - pH value - Postmortem maturation - Shearing force - Storage
Classification code:461 Bioengineering and Biology - 604.1 Metal Cutting - 731.3 Specific Variables Control - 801.1 Chemistry, General - 801.2 Biochemistry - 822.3 Food Products
DOI:10.3969/j.issn.1002-6819.2010.z1.060
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523627Title:Analysis of factors on impacting potential productivity of winter wheat in Huanghuaihai agricultural area over 30 years
Authors:Wang, Hong (1); Chen, Fu (1); Shi, Quanhong (1); Fan, Shichao (1); Chu, Qingquan (1)
Author affiliation:(1) College of Agriculture and Biotechnology, China Agriculture University, Beijing 100193, China
Corresponding author:Chu, Q.
(cauchu@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:90-95
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, light-temperatural and meteorological potential productivity of wheat were analyzed in 21 typical sites from seven sub-zones of Huanghuaihai agricultural area in the period of 1968-1977 (C1 scenario) and 1998-2007 (C2 scenario) by using AEZ (Agro-Ecological Zone) model. Meanwhile, the effects of climate conditions and cultivar on the wheat potential productivity were evaluated in order to find out the reason for the variability of productivity in different zones over times. The results showed the potential productivity on light-temperatural and meteorological level increased by 3.96 t/hm2 and 3.32 t/hm2 from 1968-1977 (C1 scenario) to 1998-2007 (C2 scenario), respectively. The increase of potential productivity was higher in the south and east areas than that in the north and west. The improved breeds (0.44) played a more important role in increasing light-temperatural potential yield than meteorology (0.33) and interaction between them (0.22). The increase of light-temperatural potential mainly depended on the improved breeds in north and east areas, where the climate condition was adverse; while in south and west area the improving of potential productivity was due to both the improved breeds and advantageous climate. In Huanghuaihai agricultural area, water is the limited factor for meteorological potential productivity because of less precipitation during the period from jointing to heading.
Number of references:12
Main heading:Productivity
Controlled terms:Crops - Ecology
Uncontrolled terms:Agricultural areas - Agro-ecological zones - Climate condition - Climatic changes - Potential productivity - Potential yield - Winter wheat
Classification code:454.3 Ecology and Ecosystems - 821.4 Agricultural Products - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.019
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523618Title:5XS series color sorting cottonseeds parameter optimization
Authors:Sun, Xiaoli (1); Kan, Za (1); Li, Jingbin (1); Zhang, Ruoyu (1)
Author affiliation:(1) College of Mechanical Electrical Engineering, Shihezi University, Shihezi 832000, China
Corresponding author:Kan, Z.
(kz_mac@shzu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:42-45
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To explore the 5XS series color sorting cottonseeds machine working parameters of the best match to the color sorting machine precision, with the ratio and cotton seed crushing rate as the evaluation indexes, the single factor and orthogonal tests were conducted with different background plate angle, work pressure, color sensitivity and seed flow values. Single factor tests showed that the effects of background plate angle, work pressure and color sensitivity on color accuracy and carryover ratio were significant. Orthogonal tests showed that with background plate angle 135°, working pressure 250 kPa, sensitivity 242, the color sorting accuracy was up to 99.5%, and the carryover ratio was 1:0.39.
Number of references:9
Main heading:Color
Controlled terms:Agricultural machinery - Optimization
Uncontrolled terms:Best match - Color accuracy - Color sorting - Cottonseeds - Crushing rates - Evaluation index - Machine precision - Machine working - Orthogonal test - Out of proportion - Parameter optimization - Work pressures - Working pressures
Classification code:741.1 Light/Optics - 821.1 Agricultural Machinery and Equipment - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.z1.010
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523611Title:Design of insert-metering device for subdistrict breeding seeder
Authors:Jiang, Feng (1); Chen, Haitao (1); Wang, Yecheng (1)
Author affiliation:(1) College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Chen, H.
(haitao1963@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:9-12
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the mechanization level of breeding experiment, reduce labor intensity, according to the demand of the subdistrict breeding seeder, a metering device named insert-metering device for subdistrict breeding seeder was designed. The performance of the metering device was tested by the different working speeds and inter-plant spacing. Results showed that while the working speed was from 0.4 m/s to 0.6 m/s, inter-plant spacing was 8.5cm, the acceptability rate was equal to or greater than 82.45%, the multiples rate was equal to or less than13.38%, the miss rate was equal to or less than 4.16%, which all met the requirement on the highest class product; while inter-plant spacing was 4.0 cm, the acceptability rate was equal to or greater than 65.25%, met the requirement on the first class product, the multiples rate was equal to or less than 13.87%, met the requirement on the highest class product, the miss rate was equal to or less than 19.50%, met the requirement on the first class product. The experiment results indicated that the structure and breeding performance of metering device satisfied the agriculture requirement.
Number of references:14
Main heading:Experiments
Controlled terms:Agricultural machinery - Agriculture - Equipment - Machine design
Uncontrolled terms:Breeding performance - First class products - Inserted - Labor intensity - Metering devices - Miss-rate - Performance tests - Plant spacing - Subdistrict breeding - Working speed
Classification code:601 Mechanical Design - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 901 Engineering Profession - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.z1.003
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523636Title:Application of chloride tracer method to study replenishment ratio of precipitation in desert
Authors:Liu, Xiaoyan (1); Chen, Jiansheng (2); Sun, Xiaoxu (3)
Author affiliation:(1) College of Civil Engineering, Hohai University, Nanjing 210098, China; (2) Reserch Institute of Science and Technology, Hohai University, Nanjing 210098, China; (3) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Corresponding author:Liu, X.
(xylzjz@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:146-149
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Two profiles, located in Wuhaizi and Nuoertu, respectively, were sampled to evaluate the annual groundwater recharge in southeast of Badain Jaran Desert using method of chloride mass balance. The mean annual recharge calculated was 0.81 mm/a and 1.24 mm/a, which account for 0.9% and 1.4% of the mean annual precipitation, respectively. This implies that the direct recharge through the unsaturated zone is negligible. Thus, the local modern precipitation infiltration recharge is not the main replenishment source of groundwater.
Number of references:21
Main heading:Replenishment (water resources)
Controlled terms:Chlorine compounds - Landforms - Moisture determination - Rain - Recharging (underground waters) - Seepage - Soil mechanics - Soil moisture
Uncontrolled terms:Badain Jaran Desert - Chloride ion - Chloride mass balance - Chloride tracers - Ground water recharge - Mean annual precipitation - Rainfall - Unsaturated zone
Classification code:944.2 Moisture Measurements - 804.1 Organic Compounds - 483.1 Soils and Soil Mechanics - 481.1 Geology - 444.2 Groundwater - 444 Water Resources - 443.3 Precipitation - 441 Dams and Reservoirs; Hydro Development - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.z1.028
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523609Title:Design of separating cylinder of pocket hole separating machine on large-scale seeding production for hybrid rice
Authors:Wu, Mingliang (1); Xie, Fangping (1); Tang, Lun (1); Yu, Yinghong (2); Wang, Huimin (1); Deng, Ping (1); Liu, Yong (1)
Author affiliation:(1) College of Engineering, Hunan Agricultural University, Changsha 410128, China; (2) Hunan Academy of Agricultural Sciences, Changsha 410125, China
Corresponding author:Wu, M.
(mingliangwu0218@sohu.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:1-4
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To change the situation of inefficient, labor intensive, uneven pollination, and low seed quality and yield of hybrid rice seed production when following the traditional rules of male sterile lines and restorer lines planting regularly, a kind of efficient mechanized sorting equipment is urgently needed in the existing engineered mixture sowing seed production. In this paper, experimental research methods were adopted to research the kinematic and structure parameters of the separation tube of sorting machine. The results show that when the length of the male sterile lines is less than 5.8 mm, and the restorer lines more than 12 mm, the external diameter of separating cylinder is 130 mm, the rotation speed of sorting machine is 30 r/min, the diameter and depth of the pocket hole is 7 mm and 3 mm, respectively, then the sorting machine can achieve a good result for seed sorting. This sorting machine can provide basic guarantee for solving seed sorting of male sterile lines and restorer lines of hybrid rice.
Number of references:15
Main heading:Seed
Controlled terms:Cylinders (shapes) - Machine design - Separators
Uncontrolled terms:Engineered seed - Experimental research - Hybrid rice - Hybrid rice seed - Labor intensive - Male sterile - Pocket hole - Rotation speed - Seed production - Seed quality - Structure parameter
Classification code:408.2 Structural Members and Shapes - 601 Mechanical Design - 802.1 Chemical Plants and Equipment - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z1.001
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523673Title:Application of near infrared spectroscopy and clustering analysis to classify wines from different origins
Authors:Liu, Wei (1); Zhan, Jicheng (1); Huang, Weidong (1); Li, Demei (2); Liu, Guojie (3)
Author affiliation:(1) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) Department of Food Science, Beijing University of Agriculture, Beijing 102206, China; (3) College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author:Zhan, J.
(jczhan@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:374-378
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The quick, lossless and green near-infrared spectroscopy (NIRS) technology was explored to classify red wines according to their geographical origins namely Changli, Shacheng from China and Bordeaux from France. The NIRS preprocessed data collected from 47 red wine samples were analyzed by using stepwise regression analysis (SAR), principal components analysis (PCA) and cluster analysis (CA), and a prediction model of red wine geographical origin was established for discriminant analysis. The test result showed that the feature spectrum of the red wines of Changli, Shacheng and Bordeaux was 1400-1550 nm and 2000-2300 nm. The PCA space of red wines from three origins was basically independent distribution. It was the longest distance of spectra between the samples from Bordeaux and domestic origin. There was a little cross part between Changli and Shacheng samples. The clustering analysis model by the Ward's method based on 38 samples was used to predict the 9 unknown samples. The origin recognition rate of 88.9% was achieved. It is concluded that the NIRS technology is both accurate and stable for geographical origin wines discrimination.
Number of references:15
Main heading:Principal component analysis
Controlled terms:Cluster analysis - Discriminant analysis - Infrared devices - Mathematical models - Near infrared spectroscopy - Nondestructive examination - Regression analysis - Spectrum analysis - Wine
Uncontrolled terms:1550 nm - Clustering analysis - Different origins - Geographical origins - Lossless - Non destructive - Pre-processed data - Prediction model - Principal Components - Principal components analysis - Recognition rates - Red wine - Stepwise regression analysis - Test results - Ward's method
Classification code:922.2 Mathematical Statistics - 922 Statistical Methods - 921 Mathematics - 822.3 Food Products - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.z1.066
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523619Title:Purity identification of maize seed based on color characteristics
Authors:Yan, Xiaomei (1); Liu, Shuangxi (1); Zhang, Chunqing (1); Wang, Jinxing (1)
Author affiliation:(1) College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Corresponding author:Yan, X.
(yanxiaomei521@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:46-50
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to identify miscellaneous seed from maize seed accurately and rapidly, maize seed purity identification method based on color extracted from the images of both the maize crown and the maize side was proposed for improving maize seed purity. First, segmentation and single extraction were carried on the original image; then the color models RGB and HSV were used to extract various color features from the maize crown and the maize side; finally, multidimensional eigenvectors were projected into one-dimensional space through applying fisher Discriminant Theory and K-means algorithm was carried on the new color space. The experimental results show that K-means algorithm based on one-dimensional space received through Fisher Discriminant Theory can effectively identify maize seed purity, and the recognition rate isover 93.75%. The main factors that affect recognition are projection direction and the correct choice of maize crown center region.
Number of references:13
Main heading:Seed
Controlled terms:Algorithms - Color - Feature extraction - Image enhancement - Image segmentation
Uncontrolled terms:Affect recognition - Color characteristics - Color features - Color models - Color space - Eigenvectors - Fisher discriminant - Fisher discriminant theory - Identification - Identification method - k-Means algorithm - Maize seeds - Original images - Projection direction - Recognition rates - Single extraction
Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 821.4 Agricultural Products - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z1.011
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523628Title:Irrigation of glycyrrhiza in soil wind erosion area of Loess Plateau
Authors:Li, Yongping (1); Feng, Yongzhong (1); Yang, Gaihe (1); Kang, Jianhong (3); Wu, Hongliang (3); Bao, Rui (4); Li, Yong (4)
Author affiliation:(1) Collage of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Research Center for Recycling Agricultural Engineering Technology of Shaanxi Province, Yangling 712100, China; (3) Collage of Agronomy, Ningxia University, Ningxia 750021, China; (4) Institute of Sand-Chemical Plant in Ningxia, Wuzhong 751410, China
Corresponding author:Feng, Y.
(fengyz@nwsuaf.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:96-103
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to explore the optimal water-need rule of glycyrrhiza growth in soil wind erosion area of Loess Plateau, the method of controlling irrigation system was used to carry out deficit irrigation experiment on glycyrrhiza under drought conditions. The plant height, amount of dry matter, leaf area index, net photosynthesis rate and transpiration rate of leaves of glycyrrhiza and soil moisture were dynamically determined in different period of duration. The results showed that there was a significant difference in physiological characters of different treatments of glycyrrhiza with the boost of growing season, the treatment of the irrigation amount 900 m3/hm2 for 4 times had the characteristics of higher plant, larger leaf area index, stronger photosynthesis and more biomass. The conclusion is valuable to increase coverage of vegetation and capability of soil against corrosion in soil wind erosion area of Loess Plateau.
Number of references:26
Main heading:Irrigation
Controlled terms:Ecology - Erosion - Experiments - Forestry - Photosynthesis - Soil moisture
Uncontrolled terms:Deficit irrigation - Drought conditions - Dry matters - Glycyrrhiza - Growing season - Higher plants - Irrigation systems - Leaf Area Index - Loess Plateau - Net photosynthesis rate - Plant height - Soil wind erosion - Soil wind erosion area - Transpiration rates
Classification code:821.3 Agricultural Methods - 821.0 Woodlands and Forestry - 741.1 Light/Optics - 901.3 Engineering Research - 483.1 Soils and Soil Mechanics - 454.3 Ecology and Ecosystems - 407 Maritime and Port Structures; Rivers and Other Waterways - 483 Soil Mechanics and Foundations
DOI:10.3969/j.issn.1002-6819.2010.z1.020
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523655Title:Effects of climate change on agricultural meteorological disaster and crop insects diseases
Authors:Li, Yijun (1); Wang, Chunyi (1); Zhao, Bei (2); Liu, Wenjun (3)
Author affiliation:(1) Chinese Academic Meteorological Sciences, Beijing 100081, China; (2) Meteorological Administration of Taizhou, Taizhou 225300, China; (3) Beijing Meteorological Administration of Haidian District, Beijing 100080, China
Corresponding author:Wang, C.
(wcy@cms1924.org)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:263-271
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Climate changes result in warming air temperature and frequent perturbations in precipitation and along with extreme weather events, which is the great threat to the safety of agricultural production. This paper summarized the occurrence and development trends of agricultural meteorological disaster, and new changes in kinds of crop insects and agricultural meteorological disaster base on previous research results and on the data from "Chinese Agriculture Yearbook" published by National Bureau of Statistics. The results showed that most of agricultural meteorological disaster and crop insects became severe with climate warming, in particular, the high frequency of extreme weather events as a great threat to the safety of food production. The future agricultural disasters and pests will be even more frequently, which make agricultural production unstable, and a positive response should be taken.
Number of references:36
Main heading:Climate change
Controlled terms:Crops - Economic and social effects - Meteorology - Weather information services
Uncontrolled terms:Agricultural disasters - Agricultural meteorological disaster - Agricultural productions - Air temperature - Climate warming - Development trends - Extreme weather events - High frequency - Research results - Safety of food
Classification code:443 Meteorology - 451 Air Pollution - 821.4 Agricultural Products - 971 Social Sciences
DOI:10.3969/j.issn.1002-6819.2010.z1.048
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523648Title:Winter wheat planting area extraction based on MODIS EVI image time series
Authors:Zhang, Xia (1); Shuai, Tong (1); Yang, Hang (1); Huang, Changping (1)
Author affiliation:(1) Institute of Remote Sensing Applications, Chinese Acad. of Sci., Beijing 100101, China; (2) Graduate University of Chinese Acad. of Sci., Beijing 100039, China
Corresponding author:Shuai, T.
(t_shuai@hotmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:220-224
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The vegetation index time series can reflect the growth changes of the vegetation in the time dimension, and this provides a potential way for the land cover classification and cropland area extraction. The field survey data were used to extract sample and validate for MODIS EVI data indirectly by using TM data as the transition data. Considering the winter wheat phenological calendar, the identifiers of winter wheat were parameterized as growth rate, declining rate, ratio of peak to dormancy, and then the winter wheat area of Huabei Plain was extracted. The extraction result was quite consistent with TM-based result with a precision of 89.13%. For the whole Huabei Plain, twelve out of 13 selected counties/cities had errors less than 20% than those from the official statistics data. The errors were caused mostly by the coarse resolution of MODIS and the smaller area of cropland of Huabei Plain.
Number of references:20
Main heading:Vegetation
Controlled terms:Errors - Extraction - Landforms - Radiometers - Remote sensing - Security of data - Time series
Uncontrolled terms:Field surveys - Image time-series - Land cover classification - MODIS EVI - Official Statistics - Parameterized - Planting area - Time dimension - Transition data - Vegetation index - Winter wheat
Classification code:944.7 Radiation Measuring Instruments - 922.2 Mathematical Statistics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 802.3 Chemical Operations - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.z1.040
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523640Title:Regression scale analysis of winter wheat yield estimation by remote sensing
Authors:Chen, Lianqun (1); Zhu, Zaichun (1); Zhang, Jinshui (1); Zhang, Qun (2); Pan, Yaozhong (1)
Author affiliation:(1) State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China; (2) Agricultural Department in Beijing Investigation Corps of National Statistical Bureau, Beijing 100054, China
Corresponding author:Zhang, J.
(zhangjsh@ires.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:169-175
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In the paper, statistic survey and yield estimation by remote sensing were combined by using two kind of ground survey data provided by Beijing Statistical Bureau, including sample village scale and plot scale to predict winter wheat yield. Sample villages, plots and plots stratification were used to estimate yield, and the correlations between predicted yield and statistic data were analyzed on different scales. The results showed that using ground survey data of sample village scale and plot scale both could get high-precision yield in Beijing area; on district-level, using ground survey data of plot scale could get more accurate yield than sample village scale; on the village level, predicting yield with ground survey data of plot scale could fit statistical yield better than sample village scale, and the yield model was more stable. Therefore, using ground survey data of plot scale to build entirety regression and stratified regression model are feasible and effective, both of them can get estimated yield of high-precision on small region level.
Number of references:20
Main heading:Surveys
Controlled terms:Crops - Estimation - Regression analysis - Remote sensing
Uncontrolled terms:Beijing area - Different scale - Ground surveys - High-precision - NDVI - Predicted yield - Regression model - Scale - Scale analysis - Small region - Statistic data - Statistic surveys - Stratification - Winter wheat - Yield estimation - Yield models
Classification code:405.3 Surveying - 731.1 Control Systems - 821.4 Agricultural Products - 921 Mathematics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.z1.032
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523642Title:Cotton leaf image edge detection using Mean-shift algorithm and lifting wavelet transform
Authors:Li, Han (1); Wang, Ku (1); Bian, Haoyi (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agriculture University, Beijing 100083, China
Corresponding author:Li, H.
(emmahanhan@foxmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:182-186
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Based on Mean-shift algorithm and lifting wavelet transform, a novel edge detection algorithm was proposed in this paper, in order to detect the edge of cotton leaf in an image with the presence of clutter and occlusion. Firstly, the color image was smoothed using Mean-shift algorithm. Then the lifting wavelet transform was used to enhance the edge of the smoothed image. Based on Canny operator, the edge of the cotton leaf was detected. The method can greatly reduce non-edge noises, and is able to effectively extract the edges between the overlapping leaves. Comparing with the experimental results of traditional edge detection methods, this approach can robustly detect the edge of the cotton leaf among clutter and occlusion while achieving obvious validity and accuracy.
Number of references:16
Main heading:Edge detection
Controlled terms:Algorithms - Clutter (information theory) - Cotton - Image analysis - Mathematical operators - Wavelet transforms
Uncontrolled terms:Canny algorithm - Canny Operators - Color images - Edge detection algorithms - Edge detection methods - Edge noise - Leaf images - Lifting wavelet transforms - Mean shift algorithm
Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 819.1 Natural Fibers - 921 Mathematics - 921.3 Mathematical Transformations
DOI:10.3969/j.issn.1002-6819.2010.z1.034
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523621Title:Theoretical research and simulation analysis on operating parameters of pneumatic vibration precision seed-metering
Authors:Wang, Shuming (1); Wei, Tianlu (1); Zhou, Haibo (1)
Author affiliation:(1) College of Mechanical Engineering, Jiamusi University, Jiamusi 154007, China
Corresponding author:Zhou, H.
(haibo_zhou@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:56-60
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Basing on experimental research the movement of the pneumatic precision seed-metering device vibrating plate and seeds in theory were analyzed. The correctness of operating parameters in a steady work state was confirmed by using simulation analysis. The pneumatic vibration disk system simplifying single degree of freedom damped forced vibration, to simulate vibration of experimental data was proposed. Simulation results show that the parameters such as system stiffness and damping vibration can be reacted the normal working state. It provides the corresponding operating parameters and theoretical basis for pneumatic vibration-type precise metering device design.
Number of references:16
Main heading:Vibration analysis
Controlled terms:Agricultural machinery - Computational methods - Computer simulation - Equipment - Optimization - Pneumatic materials handling equipment - Pneumatics - Seed
Uncontrolled terms:Damping vibrations - Disk systems - Experimental data - Experimental research - Forced vibration - Metering devices - Operating parameters - Precision seeding - Seed-metering device - Simulation analysis - Simulation result - Single degree of freedoms - System stiffness - Theoretical basis - Theoretical research - Vibrating plate - Working state
Classification code:943.2 Mechanical Variables Measurements - 921.5 Optimization Techniques - 921 Mathematics - 901 Engineering Profession - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 723.5 Computer Applications - 632.4 Pneumatic Equipment and Machinery - 632.3 Pneumatics
DOI:10.3969/j.issn.1002-6819.2010.z1.013
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523651Title:Dynamic expert support degree method for group decision making of agricultural diseases forecasting system
Authors:Li, Jingtao (1); Gu, Lin (1); Xie, Wen (2); Zou, Ping (1); Fu, Yang (3); Yang, Yanli (4); Zhang, Xingtao (2)
Author affiliation:(1) Information and Automation Department, Kunming University of Science and Technology, Kunming 650051, China; (2) Kunming Railway Mechanical School, Kunming 650208, China; (3) Kunming Plant Protection Station, Kunming 650101, China; (4) Plant Protection Department, Yunnan Agricultural University, Kunming 650201, China
Corresponding author:Yang, Y.
(zqccn@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:235-240
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In agricultural diseases forecasting system, it usually uses the method of expert group decision making and the expert support degree to reflect the effect of expert personal decision to the group decision consequence. In this way, the rationality of the group decision consequence can be improved effectively. In this kind of systems, the static expert support degree is always employed, and the expert's personal decision has randomness because of the different environment. Therefore, the randomness could lead to a wrong result. It presented a dynamic method of expert support degree, and set up the model of multi-expert group decision for the agricultural diseases forecasting system, and used the dynamic weight value calculation method to adjust the expert support degree in this system. The method can not only reflect the experience of expert, but also resolve the question from the randomness of the expert's views, and improve the scientificity and the reliability of the group decision making of the agricultural diseases forecasting system. This method has been used in practical project.
Number of references:23
Main heading:Quality assurance
Controlled terms:Agriculture - Behavioral research - Decision making - Forecasting - Random processes - Slope stability - Software engineering - Software reliability
Uncontrolled terms:Calculation methods - Dynamic method - Dynamic weight - Expert group decision - Forecasting system - Group decision - Group Decision Making - Multi-expert - Personal decision - Support degree - The reliability of decision
Classification code:971 Social Sciences - 922.1 Probability Theory - 913.3 Quality Assurance and Control - 912.2 Management - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 723.1 Computer Programming - 406.2 Roads and Streets
DOI:10.3969/j.issn.1002-6819.2010.z1.043
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523650Title:Monitoring vegetation-cover changes based on NDVI dimidiate pixel model
Authors:Liu, Lin (1); Yao, Bo (2)
Author affiliation:(1) School of Science, Anhui Agricultural University, Hefei 230036, China; (2) Geophysical and Geochemical Exploration Institute of Anhui Province, Hefei 230022, China
Corresponding author:Liu, L.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:230-234
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The accuracy and scope of vegetation fraction by NDVI dimidiate pixel model was studied in this paper. Selecting the appropriate NDVIsoil and NDVIveg for urban areas, vegetation fraction values were calculated respectively based on TM of Hefei City, Anhui Province in 2002 and 2007 by NDVI dimidiate pixel model, changes in vegetation fraction were obtained by image - minus method. For Hefei City, during the study period, vegetation coverage in general decreased. The most obvious was the decline in Binhu New Area and Baohe Industrial Park, decreased values were 16.7% and 21.4%, respectively. The sharp reduction of vegetation cover caused by urban expansion is a remarkable ecological problem. Compared with the results of aerophotograph surveying, the value of vegetation fraction obtained by this method is higher in low vegetation-covered area, and which is lower in high vegetation-covered forest area, but the vegetation fraction change calculated by image -minus method can eliminate some system error and achieve higher precision in all areas, so image -minus method based on NDVI dimidiate pixel model can serve as an important means of monitoring vegetation cover.
Number of references:15
Main heading:Vegetation
Controlled terms:Ecology - Pixels - Remote sensing
Uncontrolled terms:Anhui province - Ecological problem - Forest area - Hefei City - Industrial parks - NDVI - System errors - Urban areas - Urban expansion - Vegetation cover - Vegetation coverage - Vegetation fractions
Classification code:454.3 Ecology and Ecosystems - 723.5 Computer Applications - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2010.z1.042
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523661Title:Dynamic analysis of forest land conversion and forest ecological services value in Chaobai River Basin
Authors:Zheng, Jiangkun (1); Yu, Xinxiao (1); Xia, Bing (1); Xin, Zhongbao (1); Jia, Guodong (1); Zheng, Lukun (2)
Author affiliation:(1) Key Laboratory for Soil and Water Conservation and Desertification Combating of Ministry of Edu., Institute of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; (2) Department of Mathematics, University of North Carolina at Charlotte, Charlotte 28223, United States
Corresponding author:Yu, X.
(yuxinxiao@bjfu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:308-314
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Through building an evaluation index, the ecological services value of forests was quantified and evaluated dynamically in Chaobai River Basin with four periods' land-use data and the spatio-temporal Markov chains model to realize green GDP accounting. The results showed that all types of land-use turned to forest land gradually in a whole trend, with the forest land transformation method changing from simple to complex, the frequency changing from small to large, while forest land and other land-use types showed the opposite process of transformation during the four periods from 1972 to 2008 in Chaobai River Basin. The total forest area in 1987, 2000, 2008 increased by 5.4%, 36.9%, 46.7%, and predicted area in 2020, 2030, 2040 would increase by 46.1%, 46.0%, 46.0% compared with that in 1972.The total value of forest ecosystem services increased by 6.2%, 55.5%, 71.2% and 72.1%, 72.9%, 73.6% than that in 1972.Among all the functions, water conservation accounted for the highest percentage of the total value of ecological services, as well as the broad-leaved forests among all the types of forests; the proportion of mixed forests increased remarkably. Coniferous, broadleaf and mixed forests play a dominant role in the changes of the forest ecological value in 1972-1987, 1988-2000 and 2001-2040, respectively. The forest ecosystem service value per unit area has increased by periods and forest structure has got optimized.
Number of references:32
Main heading:Ecosystems
Controlled terms:Dynamic analysis - Environmental engineering - Forestry - Land use - Markov processes - Rivers - Water conservation - Watersheds
Uncontrolled terms:Broad-leaved forests - Ecological services - Ecosystem service value - Evaluation index - Forest area - Forest ecosystem - Forest land - Forest structure - Markov chains model - Mixed forests - Per unit - River basins - Spatio-temporal - Total values
Classification code:821.0 Woodlands and Forestry - 454.3 Ecology and Ecosystems - 454 Environmental Engineering - 922.1 Probability Theory - 444.1 Surface Water - 422.2 Strength of Building Materials : Test Methods - 403 Urban and Regional Planning and Development - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z1.054
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523665Title:Research on food safety information early warning system
Authors:Pan, Chunhua (1); Zhu, Tonglin (1); Zhang, Mingwu (1); Liang, Zaoqing (1)
Author affiliation:(1) College of Informatics, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zhu, T.
(tlzhu@scau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:329-333
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to leverage computer software to support automatic-warning against and intelligent decision-making on risks associated with food safety, the quantitative algorithms for food safety information risk and the implementation using computer software were studied. Based on test data and other regulatory information, a data model being categorized into 5 levels to address the possible risks associated with food safety was put forward. Integrating the instance of milk inspection, the key steps and technology using the data model to realize computer programming. It is proved that the operability and scientificity of the software, which generates early warnings against different food safety events and can ensure the systemic and consistency of early warnings.
Number of references:17
Main heading:Safety engineering
Controlled terms:Alarm systems - Computer programming - Computer software - Decision making - Food products - Health - Models
Uncontrolled terms:5-level - Data models - Early warning - Early Warning System - Food safety - Intelligent decision-making - Test data
Classification code:723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 822.3 Food Products - 902.1 Engineering Graphics - 912.2 Management - 914 Safety Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.058
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523653Title:Research and implement of component library software development-oriented in agriculture
Authors:Gao, Yunbing (1); Chen, Tianen (1); Chen, Liping (1); Wang, Yuansheng (2); Xu, Liyuan (1); Xu, Gang (1); Dong, Jing (1)
Author affiliation:(1) National Research Center for Intelligent Agricultural Equipment, Beijing 100097, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (3) Information Technology Institute, Capital Normal University, Beijing 100048, China
Corresponding author:Gao, Y.
(gybgis@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:246-251
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Aimed at existing problems of duplication, inefficiency in agricultural application software development, the component library technique of agricultural was studied and the agricultural component description model was put forward according to the characteristics of agricultural components. Through analyzing the key problems such as retrieval, release, approval, storage, evaluation and feedback functions in detail, the specific methods of building agricultural component library were given and system of component library that adopts MVC framework was developed. At last, application software development was implemented for experiment and the results showed that component library could effectively improve the quality of software development, and at the same time reduce development costs.
Number of references:19
Main heading:Software design
Controlled terms:Agriculture - Computer software reusability - Computer software selection and evaluation - Models - XML
Uncontrolled terms:Component - Component libraries - Facet - Software Re-use - XML Schema
Classification code:723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 902.1 Engineering Graphics
DOI:10.3969/j.issn.1002-6819.2010.z1.045
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523666Title:Technology of air-impingement drying for fresh cistanche
Authors:Du, You (1); Guo, Yuhai (1); Cui, Xusheng (1); Chen, Xiaoli (1); Zhai, Zhixi (1)
Author affiliation:(1) Chinese Medicinal Herbs Research Center, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author:Guo, Y.
(yhguo@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:334-337
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, effects of the drying conditions such as the air temperature in drying oven, wind speed and slice thickness on the qualities of fresh cistanche which contains color and medicinal compositions during the drying process were studied. To optimize the best drying process, the fresh cistanche was taken as materials, the cistanche slices was dried by gas impact jet flow method, the color of dry cistanche slice was identified by image analysis method, and the contents of galactitol, echinacoside and verbascocide in cistanche were determined by the high performance liquid chromatography method (HPLC). As a result, the best drying process in which the drying temperature was 70°C, the wind speed was 12 m/s, the thickness of the cistanche slice was 2 mm were obtained. Using the technology, cistanche slices were pale yellow and contained more galactitol were finally gotten. In all, the technology can efficiently promote the value of commodities and offer a guide during the drying process of cistanche slices.
Number of references:15
Main heading:Drying
Controlled terms:Color - Curing - Gas chromatography - High performance liquid chromatography - Technology - Wind effects
Uncontrolled terms:Active Ingredients - Agricultual products - Air temperature - Drying condition - Drying process - Drying temperature - Echinacoside - Fresh cistanche pieces - Galactitol - Image analysis method - Jet flow - Slice thickness - Wind speed
Classification code:443.1 Atmospheric Properties - 642.1 Process Heating - 741.1 Light/Optics - 801 Chemistry - 815.1 Polymeric Materials - 901 Engineering Profession
DOI:10.3969/j.issn.1002-6819.2010.z1.059
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523624Title:Analysis on the phenomenon of seed jams in downspouting of thresher and its countermeasure
Authors:Wu, Xiaoqiang (1); She, Yuehui (2)
Author affiliation:(1) College of Information and Engineering, Sichuan Agricultural University, Yaan 625014, China; (2) College of Agronomy, Sichuan Agricultural University, Yaan 625014, China
Corresponding author:Wu, X.
(wxqiang58@sina.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:71-75
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, starting with the jam problem existed in the 5TD-680 thresher which is specially used for threshing soybean seed, and applying the dynamical theory, the mechanism of seed jams in the downspouting of thresher was analyzed. The mechanical formula for the downspouting of thresher was derived by applying mechanical theory and methods. According to the mechanical formula, its countermeasure was proposed. It indicated that the importance of omni-design for thresher which should include rational downspouting, the formula and the way in this paper could supply a reference for the design and research of downspouting of the thresher or other related agricultural implements.
Number of references:20
Main heading:Dynamics
Controlled terms:Agricultural implements - Agricultural machinery - Agriculture - Dynamic models - Research - Seed
Uncontrolled terms:Downspouting - Dynamical theory - Jam - Mechanical theory - Soybean seeds - Thresher
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901.3 Engineering Research - 921 Mathematics - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2010.z1.016
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523674Title:Application of successive projections algorithm to nondestructive determination of pork pH value
Authors:Liao, Yitao (1); Fan, Yuxia (1); Cheng, Fang (1); Wu, Xueqian (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author:Cheng, F.
(fcheng@zju.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:379-383
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Using a few variables from the fresh pork spectra to construct the model of pH prediction is capable of decreasing of calculated amount, which has a vital significance to determine and monitor pork pH values. In this study, successive projection algorithm (SPA) was proposed to select feature wavelength from pork to determine the pH values. The performance of the model which constructed by variables selected of SPA was compared with various models including the model of partial least squares regression (PLSR) based on full spectrum (5000-10440 cm-1), the model constructed by variables selected of stepwise multiple linear regression (SMLR) and the model constructed by variables selected of genetic algorithm (GA). A total of 37 variables, only 2.6 percent in the full spectrum, selected by SPA were employed to construct the model with 0.870 as the correlation coefficient and 0.094 as the root of mean square error of calibration set and 0.892 as the correlation coefficient and 0.085 as the root of mean square error of validation set. While it was nearly to the PLSR model with preprocess of multiplicative signal correction, the SPA-MLR model is more accurate than SMLR model and GA model. The results confirm that SPA can be applied to select few variables from huge information space of NIR spectroscopy to build simple model to determine fresh pork pH values.
Number of references:15
Main heading:Meats
Controlled terms:Feature extraction - Genetic algorithms - Infrared devices - Linear regression - Mean square error - Near infrared spectroscopy - pH
Uncontrolled terms:Correlation coefficient - Feature selection - Fresh pork - Full spectrum - Information spaces - Multiplicative signal correction - Near Infrared - NIR spectroscopy - Non destructive - Nondestructive determination - Partial least-squares regression - pH value - Preprocess - Projection algorithms - Root of mean squares - Stepwise multiple linear regression - Successive projections algorithm
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 822.3 Food Products - 801.1 Chemistry, General - 741.3 Optical Devices and Systems - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television
DOI:10.3969/j.issn.1002-6819.2010.z1.067
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523644Title:Design and development of decision support system for fertilization based on land plot
Authors:Li, Yong (1); Zhao, Jun (1); Xie, Yewei (3); Zhang, Xingyi (1)
Author affiliation:(1) Northeast Institute of Geography and Agroecology, Chinese Acad. of Sci., Harbin 150081, China; (2) Graduate University of Chinese Acad. of Sci., Beijing 100049, China; (3) School of Forestry, Northeast Forestry University, Harbin 150040, China
Corresponding author:Zhao, J.
(zhaojun@neigaehrb.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:192-196
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Farmland has been divided into many smaller blocks, and scattered distribution, so a fertilization decision support system based on land plots is favorable and necessary in China. In this study, a fertilization decision support system was developed based on the long term field experiments in black soil region, northeast China, 723 land plots charged by farming household were taken as fertilization units, and the expert knowledge base was established according to the long term field experiments and soil nutrients balance models. The 500 soil samples with 0-20 cm layer were collected from the crop field with area of 450 ha at Guangrong Village, Hailun County; the soil map, landuse map and 723 land plots map contracted in households also were collected and treated by using ArcGIS. The database was established by the collecting data and farmland fertility survey. The geostatistics and Kriging methods were used in order to analysis the spatial heterogeneity of available nitrogen (AN), available phosphorus (AP) and available potassium (AK) and build soil nutrients maps, and then, the map of fertilization units was built mainly concerned with these soil nutrients. The VB script was used to develop the system on Super Map GIS platform. Using this system, decision makers could know the spatial variability of soil fertility and make decision on soil fertility and crop planting strategy; and farmers could access the system to obtain fertilizer recommendations for each field easily. This research will be very useful to promote the application of agricultural information through GIS.
Number of references:16
Main heading:Soil surveys
Controlled terms:Artificial intelligence - Crops - Decision making - Decision support systems - Decision theory - Experiments - Fertilizers - Geologic models - Knowledge based systems - Nutrients - Phosphorus - Potassium - Software design - Soils
Uncontrolled terms:Available nitrogen - Available phosphorus - Balance model - Black soil - Crop fields - Decision makers - Decision supports - Design and Development - Expert knowledge-base - Geo-statistics - Kriging methods - Long term - Northeast China - Secondary development - Software development - Soil fertility - Soil maps - Soil nutrients - Soil sample - Spatial heterogeneity - Spatial variability - Vb-scripts
Classification code:961 Systems Science - 921 Mathematics - 912.2 Management - 901.3 Engineering Research - 821.4 Agricultural Products - 821.2 Agricultural Chemicals - 804 Chemical Products Generally - 723 Computer Software, Data Handling and Applications - 549.1 Alkali Metals - 483.1 Soils and Soil Mechanics - 481.1 Geology
DOI:10.3969/j.issn.1002-6819.2010.z1.036
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523668Title:Effects of chitosan on post-harvest quality of apricot fruits during storage
Authors:Jiang, Ying (1); Hu, Xiaosong (2); Liu, Qi (1); Ren, Leili (1); Tang, Wenjuan (1)
Author affiliation:(1) Food College of ShiHeZi University, Shihezi 832003, China; (2) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Jiang, Y.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:343-349
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The purpose of this work was to evalute effects of chitosan on keep-freshing of post-harvest apricot. The effects of 0.75g/L chitosan treatment on the post-harvest physiology and cell ultrastructure of apricot fruits were compared with the contrast. The results show that compared with contrast, 0.75 g/L chitosan treatment can reduce the rot ratio of fruit, alleviate fruit's ripening and softening significantly, and maintaine higher total soluble solids content level. It can increase the activity of peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), but decrease the activity of polyphenol (PPO) and superoxide generation rate. It also can alleviate the degeneration of cell wall and chloroplast, and delay ripenning and senescence in the storage of apricot fruits.
Number of references:23
Main heading:Quality control
Controlled terms:Chitin - Chitosan - Chlorophyll - Fruits - Oxygen - Physiology - Walls (structural partitions)
Uncontrolled terms:Apricot - Apricot fruits - Cell walls - Chitosan treatment - Polyphenols - Postharvest - Storage - Superoxide dismutases - Superoxide generation - Total soluble solids content - Ultrastructur
Classification code:402 Buildings and Towers - 461.9 Biology - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.z1.061
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523638Title:Division of rice yield estimation by remote sensing in Hunan Province based on spatial analysis and two-dimension graphics cluster methods
Authors:Peng, Dailiang (1); Huang, Jingfeng (1); Wang, Fumin (5); Sun, Huasheng (6)
Author affiliation:(1) Institute of Agricultural Remote Sensing and Information Application, Zhejiang University, Hangzhou 310029, China; (2) Center for Earth Observation and Digital Earth, Chinese Acad. of Sci., Beijing 100190, China; (3) Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, Zhejiang University, Hangzhou 310029, China; (4) Key Laboratory of Agricultural Remote Sensing and Information System, Zhejiang Province, Hangzhou 310029, China; (5) College of Architectural and Civil Engineering, Zhejiang University, Hangzhou 310058, China; (6) College of Surveying and Mapping, Xuzhou Normal University, Xuzhou 221116, China
Corresponding author:Huang, J.
(hjf@zju.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:156-161
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to improve the accuracy of rice yield estimation by remote sensing, division of rice area in Hunan Province was studied based on rice cropping systems and topographic feature. Rice cropping systems, the ratio between rice area and land, rice unit yield at the county level, topographic feature, and location for each county were selected as the districting factors, and the methods of spatial analysis and two-dimension graphics cluster were developed. The results show two first-grade divisions, including single and double rice division, and five second-grade divisions, two of them belong to single rice division, and others belong to double rice division. These divisions keep the spatial continuation and the administrative district integrity, and the natural economy conditions uniformity inside division. Rice cropping systems, rice unit yield, and topographic feature had the independence between each division. These properties of division are helpful to estimation of rice yield by remote sensing.
Number of references:23
Main heading:Spatial variables measurement
Controlled terms:Agriculture - Estimation - Optimization - Remote sensing
Uncontrolled terms:Belong to - Cluster method - County level - Cropping systems - Division - Hunan province - Rice - Rice yield - Spatial analysis - Topographic features - Two-dimension
Classification code:731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 921.5 Optimization Techniques - 943.2 Mechanical Variables Measurements
DOI:10.3969/j.issn.1002-6819.2010.z1.030
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523634Title:Application of ant colony algorithm based continuous space in optimizing irrigation regime of rice
Authors:Yang, Na (1); Fu, Qiang (1); Li, Rongdong (2); Liu, Zhenchang (2); Ma, Zhenxia (3)
Author affiliation:(1) College of Water Conservancy and Building Engineering, Northeast Agricultural University, Harbin 150030, China; (2) Jiamusi Water Investigation, Design and Research Institute, Jiamusi 154003, China; (3) Water Affairs Bureau of Yicheng District in Zaozhuang City, Zaozhuang 277300, China
Corresponding author:Fu, Q.
(fuqiang100@371.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:134-138
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Putting forward a new ant colony algorithm in the continuous space optimization problems-real coding, coupling ant colony algorithm for optimizing continuous variables and real coding based on accelerating genetic algorithm, and dividing solution domain into some subspaces with ACA, solutions are dispersed widely and the optimal solution for the principle of pheromone positive feedback can be find easily. Using the advantages of the two algorithms, through optimizing irrigation regime of rice in Chahayang irrigation district in 2006, the results show that the new method is convenient and accurate, the model can provide scientific basis for making a reasonable irrigation schedule and improving water efficiency, and may give optimization field a new thought.
Number of references:8
Main heading:Optimization
Controlled terms:Feedback - Genetic algorithms - Irrigation - Real variables
Uncontrolled terms:Ant colony algorithm - Ant colony algorithms - Continuous space optimization - Continuous spaces - Continuous variables - Irrigation districts - Irrigation regimes - Irrigation schedule - Optimal solutions - Positive feedback - Real-coding - Water efficiency
Classification code:731.1 Control Systems - 821.3 Agricultural Methods - 921 Mathematics - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.z1.026
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523657Title:Local outlier index-based method to evaluate soil metal contamination
Authors:Zhou, Jiaogen (1); Zhao, Chunjiang (2); Wang, Jihua (2); Huang, Wenjiang (2)
Author affiliation:(1) Center of Information Technology in Agriculture, Shanghai Academy of Agriculture Science, Shanghai 201106, China; (2) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
Corresponding author:Zhao, C.
(zhaocj@nercita.org.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:279-284
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This paper proposed a local outlier index method to evaluate soil metal contamination. The method calculates local outlier index of samples. The bigger the index is, the more the object has a probability of becoming the contaminated one. Additionally, deep outlier and extensive outlier were introduced to ensure the accuracy of experimental results; a data-filtering method which is based on density-sampling was developed to reduce the algorithm complexity when dealing with massive data, by filtering intensively distributed data and reserving the data of spares regions. On real metal contamination data of farmland soils in suburbs of Beijing, the results of the local outlier index algorithm, which is consistent with that of Nemerow index method, demonstrate its effectiveness of analysis of metal contamination problem.
Number of references:17
Main heading:Soil pollution
Controlled terms:Algorithms - Contamination - Geologic models - Heavy metals - Metals - Pollution detection - Soils
Uncontrolled terms:Algorithm complexity - Distributed data - Farmland soils - Filtering method - Index algorithms - Local outliers - Massive data - Metal contamination - Outlier Detection - Real metals - Soil metals
Classification code:454.2 Environmental Impact and Protection - 481.1 Geology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z1.050
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523659Title:Spatial distribution of soil nutrient in fruit-crop intercropping in Loess Plateau of west Shanxi Province
Authors:Yun, Lei (1); Bi, Huaxing (1); Ma, Wenjing (1); Tian, Xiaoling (1); Cui, Zhewei (1); Zhou, Huizi (1); Gao, Lubo (1)
Author affiliation:(1) Key Laboratory of Soil and Water Conservation and Desertification Combating of Ministry of Education, College of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China
Corresponding author:Bi, H.
(bhx@bjfu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:292-299
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The objective of this study was to investigate the spatial distribution of soil nutrient and inter-effects under different types of fruit-crop intercropping system in the Loess Plateau of west Shanxi Province. Organic matter, total nitrogen, available phosphorus (p) and available potassium (k) in 0-100 cm soil profile were measured and analyzed under three typical fruit-crop intercropping types, i. e., walnut-peanut, walnut-soybean and walnut-maize. The results of this paper showed as follows: Spatial distribution characteristics of soil nutrient in walnut-crop intercropping types showed certain similarity. In vertical direction, soil nutrient was decreasing with the increase of soil depth, and decrease gradient of soil nutrient in vertical direction was decreasing with the increase of the distance from the walnut tree. In horizontal direction, soil nutrient was decreasing with the decrease of the distance from the walnut tree. There were competition for soil nutrient between walnut and crop in walnut-crop intercropping system. The competition was the weakest in the peanut and walnut type, and the strongest in the maize and walnut type. In order to decrease soil nutrient competition between walnut and crop in walnut-crop intercropping system, the following measures should be taken. Enhancing the management of irrigation and fertilization for intercropping system. Increasing the distance of crops from the tree row, and setting root barrier between crops and walnut.
Number of references:34
Main heading:Nutrients
Controlled terms:Competition - Crops - Fruits - Phosphorus - Potassium - Soil surveys - Soils
Uncontrolled terms:Available phosphorus - Loess Plateau - Organic matter - Soil depth - Soil nutrients - Soil profiles - Spatial distribution - Total nitrogen - Vertical direction - Walnut trees
Classification code:483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 804 Chemical Products Generally - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 911.2 Industrial Economics
DOI:10.3969/j.issn.1002-6819.2010.z1.052
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523660Title:Spatial and temporal changes of organic carbon in agricultural soils of Songnen Plain maize belt
Authors:Zhang, Chunhua (1); Wang, Zongming (1); Ren, Chunying (1); Song, Kaishan (1); Zhang, Bai (1); Liu, Dianwei (1)
Author affiliation:(1) Northeast Institute of Geography and Agricultural Ecology, Chinese Acad. of Sci., Changchun 130012, China; (2) Graduate School, Chinese Acad. of Sci., Beijing 100049, China
Corresponding author:Wang, Z.
(zongmingwang@neigae.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:300-307
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In this paper, a database of soil organic carbon in topsoil (0-20 cm) of Songnen Plain maize belt was obtained from the second national soil survey in Jilin Province and its four counties in 1980, and from field measurements in 2003-2006. The density and storage of organic carbon in agricultural topsoil was estimated from different soil types, and then the spatial and temporal variations of soil organic carbon in the past 25 years were analyzed. The results showed that the area-weighted average organic carbon density and storage in agricultural soils had an increasing trend. The significant carbon gains were 33% (4.16 kg/m2), 23.05% (3.79 kg/m2), 16.51% (3.74 kg/m2), and 12.20% (3.77 kg/m2) for Solonetzs, Dark-brown earths, Black soils and Meadow soils, respectively. On the contrary, the soil organic carbon density decreased by 30.79% (2.18 kg/m2) in the chernozems. The spatial distributions of soil organic carbon density were the same for two periods, which was higher in centre and lower in the edge region. There was a significant negative relationship (r=-0.615**, P<0.01) for the carbon changes in the past 25 years to its original contents in 1980, and the turning point of soil organic carbon was at 4.04 kg/m2. Under the current land use patterns and traditional cultivation and tillage, the soil organic carbon sequestration potential would be 0.33Tg/a in Songnen Plain maize belt.
Number of references:31
Main heading:Organic carbon
Controlled terms:Cultivation - Forestry - Land use - Landforms - Soil surveys - Soils
Uncontrolled terms:Agricultural soils - Agricultural topsoils - Black soil - Edge region - Field measurement - Jilin Province - Land use pattern - Soil organic carbon - Soil organic carbon sequestration - Soil types - Songnen plain - Spatial and temporal variation - Spatial distribution - Temporal change - Turning points - Weighted averages
Classification code:403 Urban and Regional Planning and Development - 481.1 Geology - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 821.0 Woodlands and Forestry - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.z1.053
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523672Title:Subsection-fermented process of subsalt-fermented Douchi using multiple strains
Authors:Gao, Yurong (1); Liu, Xiaoyan (1)
Author affiliation:(1) Food College of Heilongjiang Bayi Agricultural University, Daqing 163319, China
Corresponding author:Gao, Y.
(yurongg@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:369-373
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To shorten fermented time and recede in salinity, the process of subsalt-fermented Douchi using multiple strains was researched. The technological conditions for Mucor G-1 starter propagation of inoculum ratio 4.5% and cultivated 60 h at 25°C were determined using protease activity as index and protease activity reached 782.56 U/g in these conditions. And technological conditions for primary fermentation of fermented 10 d at 50°C were determined using amino-acid nitrogen as index. The optimum condition: 1.5% inoculation ratio, 8% salt and fermented at 25°C for 6 d of after-fermentation process by adding zygosaccharomyces rouxii AS 2.181 was obtained using sensory quality as index. By this technique, Douchi had not only Douchi aroma but also strong spiced, alcohol and ester-like flavor. 0.81 g/(100 g) amino-acid nitrogen was obtained and the total produced time was 19 days. The new process for Douchi producing by multiple strains, subsalt and subsection fermented was formed. The different producing phase in this process can be controlled easily and the total fermented time can be shortened and this process may provide basis for modern technique reformation of the traditional fermentation food of Douchi.
Number of references:15
Main heading:Fermentation
Controlled terms:Catalysts - Enzymes - Esters
Uncontrolled terms:Dou-chi - Fermentation process - Mucor - Multiple strains - New process - Optimum conditions - Protease activities - Sensory qualities - Subsalt - Technological conditions - Zygosaccharomyces rouxii
Classification code:802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds
DOI:10.3969/j.issn.1002-6819.2010.z1.065
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523637Title:Analysis of soil erosion on typical forest and grassland in Xihanshui River Basin
Authors:Jia, Yanhong (1); Wang, Zhaoyin (1); Qi, Lijian (1)
Author affiliation:(1) State Key Laboratory of Hydroscience and Engineering of Tsinghua University, Beijing 100084, China
Corresponding author:Wang, Z.
(zywang@tsinghua.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:150-155
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to provide data for agriculture and soil & water conservation efforts, Cesium-137 technique was used to quantify soil erosion on typical forest and grassland in the Xihanshui River Basin, Cesium-137 technique was conducted by three steps: field sampling, nuclide content determination, and erosion rate calculation. The local Cesium-137 reference inventories range from 1600 to 2402 Bq/m2, and the average reference inventory is 2022 Bq/m2. It shows exponential decrease of mass concentration and inventory with depth down to an undisturbed soil profile. For different land use, slight erosion occurs at grass land, deposition or no significant loss occurs at forest, and moderate erosion occurs at revegetated land. The order of soil erosion intensity is as following: forest<grassland<revegetated land. For the same vegetated hillslope, sediment production is in the following order: top>middle>lower. The vegetation cover affects soil erosion and deposition rates, and in general, the rate of soil erosion is inversely proportional to the vegetation cover.
Number of references:16
Main heading:Erosion
Controlled terms:Cesium - Rivers - Soil conservation - Soils - Vegetation - Water conservation - Water content - Watersheds
Uncontrolled terms:Cesium 137 - Content determination - Erosion rates - Field sampling - Forest and grassland - Hillslopes - Mass concentration - River basins - Sediment production - Soil erosion - Tracing analysis - Undisturbed soils - Vegetation cover - Xihanshui River Basin
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 549.1 Alkali Metals - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 444.1 Surface Water - 444 Water Resources - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.z1.029
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523612Title:Design of simulate hand wolfberry picking machine
Authors:Zhou, Bing (1); He, Jing (1)
Author affiliation:(1) Automatic Control Department, Liaoning Machinery-Electricity Vocational-Technical College, Dandong 118002, China
Corresponding author:Zhou, B.
(1304269@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:13-17
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To solve the technical problem like large loss of fruit by picking machine and picking low efficiency, according to the natural characteristics of wolfberry mature fruit, the author designed a lyceum picking machine of simulate hand. The surface of the two rotating set up several relatively salient plastic rings in the hand-picking head. The two rotating body carry on relative motion to realize the simulation hand-picking to pick fruit by the direct current machine transmission. The machine performance test result showed that the quality of the hand-picking head was approximately 300 grams, the rotational speed of the direct current was 120 r/min, it moved steadily, there is no harm to leaves and immature fruit when it picked wolfberry fruit, and did not affect the yield and growth of postharvest. It could pick mature wolfberry 15 to 20 kg/h, however manual picking efficiency was only 2 to 3 kg/h. The machine can meet the need of large picking wolfberry, and its speed is 7 to 8 times that of manual picking.
Number of references:15
Main heading:Machine design
Controlled terms:Fruits - Harvesters - Rotation
Uncontrolled terms:Direct current - Machine performance - Picking efficiency - Picking heads - Picking machine - Plastic rings - Postharvest - Relative motion - Rotating bodies - Rotational speed - Technical problem - Wolfberry
Classification code:601 Mechanical Design - 601.1 Mechanical Devices - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z1.004
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523664Title:Inactivation of polyphenol oxidase by high-intensity pulsed magnetic field and kinetic model
Authors:Ma, Haile (1); Huang, Liurong (1); Zhu, Chunmei (1)
Author affiliation:(1) School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Ma, H.
(mhl@ujs.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:325-328
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to find an effective method to control the activity of polyphenol oxidase (PPO) in vegetable and fruit, the effects of pulsed magnetic field (PMF) on the activity of PPO were investigated. The data were adjusted to different models to study the kinetics of PPO inactivation by PMF. The results showed that when PPO was exposed to PMF at field strengths of 2.5, 3.5 and 4.5 tesla (T) for 5 to 40 pulses, residual activity of PPO decreased with the increase of field strength and number of pulse. The maximum inactivation of PPO was achieved at 4.5 T for 40 pulses, in which 93.10% of the enzyme activity was lost. The inactivation data were fitted by three kinetic models, which were Bigelow Model, Hu&die;lsheger Model and Weibull distribution function. Results showed that Weibull distribution function gave better fittings for the inactivation of PPO by PMF than Bigelow or Hu&die;lsheger models. It can be concluded that PMF is an effective non-thermal food preservation technology to inactivate PPO in vegetable and fruit. Weibull Model fits the inactivation data well, which provides reference for practical application.
Number of references:14
Main heading:Magnetic field effects
Controlled terms:Catalysts - Distribution functions - Enzyme activity - Enzymes - Food preservation - Food preservatives - Fruits - Kinetic theory - Magnetic storage - Vegetables - Weibull distribution
Uncontrolled terms:Field strengths - Kinetic models - Nonthermal - Polyphenol oxidase - Preservation technologies - Pulsed magnetic fields - Residual activity - Storage - Weibull models
Classification code:922.2 Mathematical Statistics - 922.1 Probability Theory - 822.2 Food Processing Operations - 821.4 Agricultural Products - 804.1 Organic Compounds - 931.1 Mechanics - 804 Chemical Products Generally - 708.4 Magnetic Materials - 701.2 Magnetism: Basic Concepts and Phenomena - 461.9 Biology - 461.2 Biological Materials and Tissue Engineering - 803 Chemical Agents and Basic Industrial Chemicals
DOI:10.3969/j.issn.1002-6819.2010.z1.057
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523620Title:Analysis on working mechanism of paddy weeding device
Authors:Niu, Chunliang (1); Wang, Jinwu (1)
Author affiliation:(1) Engineering College, Northeast Agricultural University, Harbin 150030, China; (2) College of Science, Dalian Ocean University, Dalian 116023, China
Corresponding author:Wang, J.
(jinwuw@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:51-55
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To meet the needs of green rice production, a spring-tooth weeding installation which works between seeding lines in paddy field was designed, and the main structure and critical components were designed, and work principle was analysed. Test was carried out in the mechanical planting ground, the line spacing for seedlings was 30 cm, and the spaced in the rows was 14-16 cm. This paper used the 7th day test to discuss, under the help of Design-Expert software to analyze the experiment data, and the interaction effects of cutter rotation speed, forward velocity of the machine, weeding depth on weeding ratio and seeding injury ratio were attained. The primary and secondary factors of effecting weeding quality and the significance of each factors was obtained. Finally, The results showed that the optimum parameters in the 7th day test were: the cutter rotation speed was 186 r/min, the forward velocity was 0.47 m/s, the weeding depth was 37 mm, weeding rate was 75%, and miller injury rate was 3.9%. The results provides a reliable basis for the machine design.
Number of references:14
Main heading:Machine design
Controlled terms:Agricultural machinery - Rotation - Seed
Uncontrolled terms:Critical component - Design-expert - Experiment data - Forward velocity - Injury rate - Inter-weed seedlings - Interaction effect - Line spacing - Main structure - Optimum parameters - Paddy - Paddy fields - Rice production - Rotation speed - Weeding device - Work principle - Working mechanisms
Classification code:601 Mechanical Design - 601.1 Mechanical Devices - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z1.012
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523617Title:Studies and progress on seed production mechanization technology in hybrid rice
Authors:Xu, Qingguo (1); Huang, Feng (2)
Author affiliation:(1) Agricultural College, Hunan Agricultural University, Changsha 410128, China; (2) Library, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Xu, Q.
(huxu0309@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:37-41
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The development course about mechanization of seed production of hybrid rice at home and abroad were reviewed and analyzed in this paper. It was proposed that hybrid rice seed production technology in China could be divided into three development phases: the phase of experience to try to find out and to accumulate about the hybrid rice seed production technology (1973-1980), the phase of technical enhancement and technical consummation (1981-1990), and the phase of the research, adoption and application (1991-until now). The adoption and application of hybrid rice with big area and hybrid rice seed production technology have been also in advance. It was thought that the seed production mechanization technology in hybrid rice must be improved from now to raise its seed quality and the benefit of seed production and the competitive power of seed production technology in China. The seed production mechanization technology in hybrid rice in the weed killer sensitive gene to induct the male parent law, the anti-weed killer gene to induct the female parent law and the method of rice husk color code hybrid rice mixes planting has been carried out until now. The mixes planting seed production mechanization technology of hybrid rice has been obtained success application in small area, other methods also are experimenting and researching. Therefore, the seed production mechanization technology in hybrid rice must be promoted by the rice breeders and the farm machinery experts throughout cooperation closely from now.
Number of references:18
Main heading:Production
Controlled terms:Agricultural machinery - Color - Curricula - Gene transfer - Genes - Herbicides - Mechanization - Research - Seed - Technology
Uncontrolled terms:Chaff colour marker - Competitive power - Development phasis - Farm machinery - Hybrid rice seed - Hybrid seed production - Rice husk - Seed production - Seed quality - Small area - Technical enhancements
Classification code:913.2 Production Control - 901 Engineering Profession - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 803 Chemical Agents and Basic Industrial Chemicals - 741.1 Light/Optics - 601 Mechanical Design - 461.8.1 Genetic Engineering - 461.2 Biological Materials and Tissue Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.009
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523630Title:Effects of surface soil mixed with sand on water infiltration and evaporation in laboratory
Authors:Song, Riquan (1); Chu, Guixin (1); Ye, Jun (1); Bai, Ling (1); Zhang, Ruixi (1); Yang, Jingsong (2)
Author affiliation:(1) Department of Resource and Environmental, College of Agriculture, Shihezi University, Shihezi 832000, China; (2) Institute of Soil Science, Chinese Acad. of Sci., Nanjing 210008, China
Corresponding author:Chu, G.
(chuguixin@gmail.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:109-114
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Employing sand mixed with surface soil is very conventional way in agriculture, it plays a significant role in control soil water infiltration, evaporation as well as inhibition soil salt accumulation in arid region in Xinjiang area. In present research, simulating experiments were conducted to investigate the effects of different sand mixed rate on soil water infiltration and soil evaporation. The soil cylinder incubation treatments were setup including 0 (Control), 25%, 50%, 75% of sand mixing rate, respectively. There were extremely significant power relationships among wetting front distance, accumulated infiltration quantity and infiltration time under different mixing rate of sand treatments. The more sand mixed, the more soil water infiltration capacity observed, i. e., the infiltration capacity order was 75%>50%>25%>0. Moreover, by means of sand mixed with soil exerted obvious positive effects on inhibition of soil evaporation, namely, the more sand mixed, the remarkable less soil water evaporated, especially when sand mixed rate increased above 75%. The relationship between cumulative evaporation and time could be described by the Rose experience formula under different mixing rate of sand, and had closely fitting accuracy during the successive evaporation of 20 days. The soil moisture at deep layers which under sand mixed layer could also be remarkably enhanced by means of soil surface mixed with sand. The more mixing rate of sand, the remarkable higher soil water content obtained.
Number of references:18
Main heading:Sand
Controlled terms:Arid regions - Evaporation - Mixing - Moisture determination - Seepage - Soil mechanics - Soil moisture - Underwater soils - Water content
Uncontrolled terms:Deep layer - Fitting accuracy - In-control - Infiltration capacity - Infiltration time - Mixed layer - Mixing rates - Positive effects - Simulating experiments - Soil surfaces - Soil water - Soil water content - Surface soil - Water infiltration - Wetting fronts - Xinjiang
Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 441 Dams and Reservoirs; Hydro Development - 444 Water Resources - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2010.z1.022
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523647Title:Land-cover classification for Henan Province with time-series MODIS EVI data
Authors:Liu, Xinsheng (1); Sun, Rui (1); Wu, Fang (1); Hu, Bo (1); Wang, Wen (4)
Author affiliation:(1) School of Geography, Beijing Normal University, Beijing 100875, China; (2) State Key Laboratory of Remote Sensing Science, Beijing 100875, China; (3) Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities, Beijing 100875, China; (4) School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
Corresponding author:Sun, R.
(sunrui@bnu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:213-219
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The significance to agriculture, forestry production and environment monitoring is obvious that extraction of land cover information based on remote sensing data. So in this study, focusing on Henan Province, making use of MODIS 16-days composite EVI data at 2005, combining with crop phenology and other reference land cover data, the land-cover classification for Henan Province was performed. The raw EVI data was processed with cloud removing and smoothing, then the support vector machine (SVM) method was adopted for the classification. Refer to the classification result, compared with the statistics of crops acreage of Henan Province in 2005, the area accuracy of classification result was as following: for large-area planted crops, wheat got 81.47%, corn 94.87%, rice 82.43%; while for the economic crops, rape was 39.81%, soybean 93.65%, cotton 95.21%, peanut 74.27%. On the other hand, combining the classified land cover type into 5 types, farmland, woodland, grassland, water body, urban and built-up. The results were further compared with 1:100000 land cover map which was produced by using the Landsat ETM+ and TM data in 2000. The overall accuracy and Kappa coefficient were 78.07% and 0.66, respectively. It turns out that the feasibility of MODIS time-series VI data and classification strategies adopted to extract crops information.
Number of references:16
Main heading:Time series analysis
Controlled terms:Crops - Forestry - Landforms - Radiometers - Remote sensing - Time series
Uncontrolled terms:Classification - EVI - Henan Province - Land cover - SVM
Classification code:481.1 Geology - 731.1 Control Systems - 821.0 Woodlands and Forestry - 821.4 Agricultural Products - 922.2 Mathematical Statistics - 944.7 Radiation Measuring Instruments
DOI:10.3969/j.issn.1002-6819.2010.z1.039
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523675Title:Validation of CHAID growth model of specific spoilage organisms in chilled large yellow croaker
Authors:Xing, Shaohua (1); Zhang, Xiaoshuan (2); Zhang, Haitao (1); Fu, Zetian (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) College of Information and Electric Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Fu, Z.
(fzt@cau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:384-387
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to predict the spoilage of microorganism in frozen fish, it is important to establish the growth model of specific spoilage organisms (SSO). The traditional growth kinetics model decreased accuracy when dealing with default data and has deviation at stable stag of microbial growth. In this paper, CHAID (chi-square automatic interaction detection) method was used to predict SSO growth of large yellow croaker compared with traditional growth kinetics model. The results showed that Vibrio was SSO of large yellow croaker. The accuracy of predicted data changed with the data quantity and the data change rate. CHAID method was less than growth kinetics model at exponential stage, but was more accurate at stable stage and large quantity of data. So modeling for growth of specific spoilage organisms in chilled fish based on CHAID can be used to predict the spoilage of microorganism.
Number of references:17
Main heading:Growth kinetics
Controlled terms:Forecasting - Microorganisms - Spoilage
Uncontrolled terms:Automatic interaction detection - CHAID method - Data change - Data quantity - Frozen fishes - Growth models - Microbial growth - Specific spoilage organisms - Storage
Classification code:461 Bioengineering and Biology - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.z1.068
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213524687Title:Three dimension simulation analysis of flooding for Shifosi reservoir based on GIS
Authors:Yang, Guofan (1); Gu, Jian (1); Chen, Jiachun (3)
Author affiliation:(1) College of Water Resourse, Shenyang Agricultural University, Shenyang 110866, China; (2) Institute of Applied Ecology, Chinese Acad. of Sci., Shenyang 110016, China; (3) Shifosi Reservoir Construction Authority of Liaoning Province, Shenyang 110129, China
Corresponding author:Yang, G.
(81041678@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:258-262
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:It's helpful to realize an efficient migration management for Shifosi Reservoir using three dimension simulation flooding analysis system. The system was established using C++ program on the basis of FLTK and OpenGL GIS. In this system, the DEM (digital elevation model) datum were extracted from 1:2000 topographic map of Shifosi reservoir in Liaoning Province according to GIS technology, remote sensing technology and virtual geographical environment, and three dimension simulation analysis of flooding were realized by overlaying analysis based on remote sensing data of land classification, the administrative divisions, the remote sensing images and DEM datum. This system realized the multiple functions as three dimension roaming in the reservoir area, three dimension profile analysis, land flooding analysis inquiries, presentations for flooding analysis, etc.. Its user-interface was friendly and convenient, and easy to be operated and safeguarded. The system has been applied in Shifosi Reservoir, and it provides the decision-making support for the land compensation of the reservoir of immigrants and helps to achieve the efficient migration management of migration reservoir.
Number of references:15
Main heading:Virtual reality
Controlled terms:Computer software - Decision making - Geographic information systems - Image reconstruction - Information systems - Maps - Remote sensing - Reservoir management - Surveying - User interfaces
Uncontrolled terms:Analysis of flooding - Analysis system - Decision making support - Dem datum - Digital elevation model - Geographic information - GIS technology - Liaoning Province - Multiple function - Profile analysis - Remote sensing data - Remote sensing images - Remote sensing technology - Reservoir area - Shifosi reservoir - Simulation analysis - Three dimensions - Topographic map - Virtual geographical environments
Classification code:912.2 Management - 903.2 Information Dissemination - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723.3 Database Systems - 723 Computer Software, Data Handling and Applications - 722.2 Computer Peripheral Equipment - 512.1.2 Petroleum Deposits : Development Operations - 405.3 Surveying
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523622Title:Plant characteristic research on field rape based on mechanized harvesting adaptability
Authors:Luo, Haifeng (1); Tang, Chuzhou (1); Guan, Chunyun (2); Wu, Mingliang (1); Xie, Fangping (1); Zhou, Yi (1)
Author affiliation:(1) College of Engineering, Hunan Agricultural University, Changsha 410128, China; (2) Institute of Oil, Hunan Agricultural University, Changsha 410128, China
Corresponding author:Tang, C.
(chzhtang2002@sina.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:61-66
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The high loss rate in the rape mechanized harvesting process has restricted the rape production development, and it is difficult to be solved only from the farm machinery aspect. The plant material characteristic research based on mechanized harvesting adaptability for the direct seeding rape was done in this paper, which combined the machinery with agronomy. The whole performance characteristics of plant in field with different density were tested. At the same time the rape silicle abruption strength was tested under the situation of different maturity and the ripener spraying, and the essential date of the plant characteristic in field was obtained. The results showed that the moderate planting density was advantageous to the mechanized harvest work, and the ripener spraying had little influence on the mechanized harvest work. The plant performance characteristic of the direct seeding rape was obtained, which also afford the fundamental research foundation and the reference for the necessary agronomy of the rape mechanized harvesting.
Number of references:16
Main heading:Harvesting
Controlled terms:Agricultural machinery - Agronomy - Mechanization - Research
Uncontrolled terms:Direct-seeding - Farm machinery - Fundamental research - In-field - Loss rates - Mechanized harvesting - Performance characteristics - Plant characteristic - Plant material - Plant performance - Planting density - Production development - Rape
Classification code:601 Mechanical Design - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.z1.014
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523614Title:Fuzzy control implementing and testing on electromechanical flow valve
Authors:Liu, Zhizhuang (1); Hong, Tiansheng (1); Zhang, Wenzhao (2); Fan, Zhiping (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China; (2) Electronics Research Institute, Hunan University of Science and Engineering, Yongzhou 425100, China
Corresponding author:Hong, T.
(tshong@scau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:22-26
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:A flow control valve based on electromechanical method and a flow control system was designed for farm chemical flow control at vehicular variable sprayer according to the requirements of real-time mixing pesticide variable spray. Employing fuzzy control algorithm and relied on STC12C5410AD MCU, the fuzzy controller for farm chemical flow was implemented. Static tracking testing and dynamic response testing were carried out for designed system. The static tracking error was ±3.0%; dynamic response state error was ±3.2%, and response time was about 0.35 s when the initial value was 1.5 mL/s and final value was 3.1 mL/s. The results of measurement and test show that fuzzy controller has good control performance on this flow valve; over-shoot, response time and steady state error are all to achieve control requirements.
Number of references:15
Main heading:Controllers
Controlled terms:Agricultural chemicals - Algorithms - Dynamic response - Flow control - Fuzzy control - Real variables - Response time (computer systems)
Uncontrolled terms:Chemical flow - Control performance - Control requirements - Flow control valves - Flow valves - Fuzzy control algorithms - Fuzzy controllers - Initial values - Over-shoot - Response time - State errors - Static tracking - Steady state errors - Variable spray
Classification code:921 Mathematics - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 732.1 Control Equipment - 722.4 Digital Computers and Systems - 631.1 Fluid Flow, General - 408.1 Structural Design, General
DOI:10.3969/j.issn.1002-6819.2010.z1.006
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523677Title:Relationship between color change and quality of Pu-erh Tea during fermentation
Authors:Wang, Qiuping (1); Gong, Jiashun (1); Zou, Shasha (1)
Author affiliation:(1) Faculty of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
Corresponding author:Gong, J.
(gong199@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:394-399
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The relationship between the chromatism and the quality of Pu-erh Tea in different fermentation stages were investigated in this paper. Sensory quality, quantitative analysis of tea infusion and the content change in tea pigments in different fermentation stages under conditions of constant temperature and humidity or constant temperature and non-constant humidity were determined in Saccharomyces cerevisiae inoculated or noninoculated Pu-erh Teas. It was found that the brightness index L and the brightness index difference ΔL had a positive proportional relationship with the sensory score of tea infusion color. Chromaticity index (a, b) and chromaticity value (Δa, Δb) were significantly positively correlated with sensory value, taste value and total quality value of tea infusion. The values of ΔL and Δb gradually decreased during different fermentation stages, but the value of Δa gradually increased. These findings were consistent with the findings that the contents of thearubigins and theaflavins were gradually reduced and theabrownin was increased. These results indicate that the degree of fermentation of Pu-erh Tea can be controlled by chromatic value and that Pu-erh Tea quality can be improved by a system with constant temperature and humidity.
Number of references:19
Main heading:Quality control
Controlled terms:Color - Fermentation - Humidity control - Yeast
Uncontrolled terms:Fermention - Pu-erh Tea - Quantitative analysis - Sensory evaluation - Tea pigment
Classification code:402 Buildings and Towers - 741.1 Light/Optics - 801.2 Biochemistry - 802.2 Chemical Reactions - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.z1.070
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523643Title:Detection algorithm for crop target multi-lines of the field image based on machine vision
Authors:Cao, Qian (1); Wang, Ku (1); Li, Han (1)
Author affiliation:(1) College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, K.
(wang_ku@263.net)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:187-191
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:When the installing height of camera was different or when the traffic running in the rough fields, there would be more than one crop lines exist in camera, in practical applications. An image algorithm which could determine all orientation lines of the targets in a crop image was proposed. The image algorithm eliminated the malpractice which need determining the number of orientation lines before extract navigation routes in tradition algorithm. The target regions were obtained by analyzing horizontal scan lines in the crop image, and then the improved Hough transformation was used to extract orientation lines. The average time required for a 720×480 pixels color image was 258 ms and the recognition rate reached 98%. The algorithm is availability in accurately detecting the orientation lines under different weathers.
Number of references:15
Main heading:Crops
Controlled terms:Algorithms - Cameras - Carbon fiber reinforced plastics - Computer vision - Hough transforms - Image analysis - Mathematical transformations
Uncontrolled terms:Color images - Crop targets - Detection algorithm - Different weathers - Field images - Horizon-Scan - Horizontal scan line - Hough Transformation - Image algorithms - Multi-centerlines detection - On-machines - Orientation line - Recognition rates - Running-in - Target regions
Classification code:921.3 Mathematical Transformations - 921 Mathematics - 821.4 Agricultural Products - 817.1 Polymer Products - 742.2 Photographic Equipment - 741.2 Vision - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2010.z1.035
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523616Title:Automatic temperature control system of zanthoxylum drying room based on fuzzy-PID
Authors:Ding, Zhuyu (1); Chen, Jian (1); Li, Yunwu (1); Wu, Dake (1)
Author affiliation:(1) College of Engineering and Technology, Southwest University, Chongqing 400716, China
Corresponding author:Chen, J.
(jianchen@swu.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:32-36
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:At present, the temperature of the zanthoxylum drying room is controlled manually in China. It has some disadvantages such as non-uniform drying, slow drying rate and high energy consumption. Therefore, in order to improve the drying quality, an advanced automatic temperature control system based on fuzzy-PID was proposed to apply in drying zanthoxylum. The functional characteristics of PID technology, fuzzy control technology, and fuzzy PID control technology were compared in the paper, and the 32-bit ARM processor was combined with the GPRS technology to realize the automatic control and the remote alarm in the zanthoxylum drying room. The inconvenient communication problem of automatic control equipment was solved. The automatic temperature control system based on fuzzy-PID could provide an effective solution scheme for automatic zanthoxylum drying in the rural area of China.
Number of references:13
Main heading:Fuzzy logic
Controlled terms:Automation - Communication - Control equipment - Curing - Drying - Energy utilization - Fuzzy control - Fuzzy sets - Process control - Remote control - Rural areas - Technology - Temperature control - Three term control systems
Uncontrolled terms:ARM processor - ARM technology - Automatic control - Automatic control equipment - Communication problems - Control technologies - Drying quality - Effective solution - Functional characteristics - Fuzzy PID-control - Fuzzy-PID - GPRS technologies - High energy consumption - Nonuniform - Remote alarm - Slow drying
Classification code:901 Engineering Profession - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 815.1 Polymeric Materials - 732.1 Control Equipment - 921 Mathematics - 731 Automatic Control Principles and Applications - 716 Telecommunication; Radar, Radio and Television - 642.1 Process Heating - 525.3 Energy Utilization - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.3969/j.issn.1002-6819.2010.z1.008
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523615Title:Loss sowing detection in field of pneumatic precision metering device for rapeseed
Authors:Li, Ming (1); Ding, Youchun (1); Liao, Qingxi (1)
Author affiliation:(1) College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Liao, Q.
(liaoqx@mail.hzau.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:27-31
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Acoording to the problem of loss sowing detection of pneumatic rapeseed precision seeder, one detection method based on seeding frequency was put forward. Using frequency measuring equipment the seeding frequency at the outlet of pneumatic metering device was tested at different rotational speeds and different seeder hold blockages and through the frequency three areas, named loss less sowing area, loss sowing area and serious loss sowing area, have been defined to estimate the degree of loss sowing. The method of loss sowing detection in field has been designed. First through smoothness processing for the real-time measuring rotational speed of metering device and interpolation operation of the frequency threshold value which was used to estimate the deep of loss sowing could be obtained. Through comparison with the median filtering measuring frequency and the frequency threshold value, the depth of loss sowing can be estimated. The tests on test-bed indicate that the method based on seeding frequency can effectively detect the degree of loss sowing, and when there is no loss seeding, the accuracy rate can be achieved to 100 percent. While up 8 seeding holes are clogged, the condition of loss seeding could also be detected with the accuracy of 100 percent. The method also can avoid continually alarming problem aroused by occasional loss seeding.
Number of references:16
Main heading:Seed
Controlled terms:Agricultural machinery - Detectors - Equipment - Pneumatics
Uncontrolled terms:Accuracy rate - Detection methods - Frequency method - Frequency threshold - In-field - Measuring equipments - Measuring frequency - Median filtering - Metering devices - Precision metering - Rapeseed - Rotational speed
Classification code:632.3 Pneumatics - 821.1 Agricultural Machinery and Equipment - 821.4 Agricultural Products - 901 Engineering Profession - 914 Safety Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.007
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523654Title:Suitability assessment of Chinese torreya based on GIS and Logistic regression
Authors:Wang, Xiaoming (1); Ao, Weijiu (1); Chen, Lisu (1); Lin, Guoxin (3); Wang, Ke (1)
Author affiliation:(1) Institution of Remote Sensing and Information System Application, Zhejiang University, Hangzhou 310029, China; (2) Research Institute of Subtropical Forestry, Chinese Academy of Forestry Sciences, Fuyang 311400, China; (3) Youxi Forest Bureau, Youxi 365100, China
Corresponding author:Wang, K.
(kwang@zju.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:252-257
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The study on the suitability assessment of Chinese torreya cultivation has the potential for providing guide information for planting and zoning. Based on GIS and Logistic regression, the authors evaluated the suitability for local Chinese torreya planting using Geoscience Database including data such as IKONOS imagery, Digital Elevation Model (DEM), soil, meteorological data and field survey data. The results showed that the acreage of the high and moderate suitable zone for Chinese torreya planting accounted for 61.7% of the total area among which the tamable acreage in the high suitable zone was 183 hectares (11.4% of the total area). The result indicated that the study area showed great potential for cultivation of Chinese torreya. The assessment provides guidance for local government in characteristic development zones of Chinese torreya planting.
Number of references:27
Main heading:Surveying
Controlled terms:Geographic information systems - Geologic models - Information systems - Logistics - Meteorology - Planning - Rating - Regional planning - Regression analysis
Uncontrolled terms:Characteristic development - Chinese torreya - DEM - Digital elevation model - Field surveys - Geographic information - Geosciences - IKONOS imagery - Local government - Logistic regressions - Meteorological data - Study areas - Suitability assessment
Classification code:922.2 Mathematical Statistics - 913 Production Planning and Control; Manufacturing - 912 Industrial Engineering and Management - 903.2 Information Dissemination - 902.2 Codes and Standards - 723.3 Database Systems - 481.1 Geology - 443 Meteorology - 405.3 Surveying - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development
DOI:10.3969/j.issn.1002-6819.2010.z1.046
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523656Title:Nitrate leaching from sunlight greenhouse soils with different cultivation years during summer fallow periods
Authors:Liu, Xiaojun (1); Zhou, Jianbin (1); Chen, Zhujun (1); Wang, Yuan (1); Ding, Xiaolong (1)
Author affiliation:(1) College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Zhou, J.
(jbzhou@nwsuaf.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:272-278
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:Nitrate contents in 13 soil profiles of sunlight greenhouses and their changes during summer fallow periods were determined in two continuous years (2006 and 2007) in Yangling, Shaanxi Province to evaluate the accumulation and leaching loss of nitrate during the summer fallow. After harvesting the vegetable, excessive amount of nitrate was accumulated in the soil profiles. The average residual nitrate in 0-200 cm soil profiles after harvesting in 2006 and 2007 were 667.6 kg/hm2 (in the range of 492.2-800.4 kg/hm2) and 781.8 kg/hm2 (in the range of 491.2-1070.7 kg/hm2), respectively. The contents of nitrate and electronic conductivity (EC) significantly increased after summer fallow in 2006 with less precipitation (65 mm); while the nitrate content and EC significantly decreased after fallow in 2007 with heavy precipitation (214 mm), indicating the leaching of nitrate in this year. The nitrate loss from 0-200 cm soil profiles was 298.5 kg/hm2, with the range of 223.8-658.0 kg/hm2 during summer fallow period in 2007. The extents of nitrate leaching were variable among different cultivated-years greenhouses. On average, the leaching loss of nitrate followed the order of greenhouses of 1998 >greenhouses of 2004 > greenhouses of 2002. It is concluded that the amount of precipitation during summer fallow is the key factor controlling the leaching loss of nitrate accumulated in soil profile of greenhouse.
Number of references:22
Main heading:Soil surveys
Controlled terms:Greenhouses - Leaching - Nitrates - Soils
Uncontrolled terms:Electronic conductivity - Greenhouse soil - Heavy precipitation - Key factors - Leaching loss - Nitrate leaching - Nitrate loss - Shaanxi provinces - Soil profile - Soil profiles - Summer fallow
Classification code:402.1 Industrial and Agricultural Buildings - 483.1 Soils and Soil Mechanics - 533.1 Ore Treatment - 804.2 Inorganic Compounds
DOI:10.3969/j.issn.1002-6819.2010.z1.049
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523678Title:Allelopathy of paulownia and poplar leaves aqueous extracts on crop seed germination
Authors:Zhao, Yong (1); Chen, Zhen (1); Wang, Keju (1); Wang, Qian (1); Fan, Wei (2)
Author affiliation:(1) College of Forestry, Henan Agricultural University, Zhengzhou 450002, China; (2) Henan Forestry Academy, Zhengzhou 450003, China
Corresponding author:Zhao, Y.
(zhaoyonghnnd@163.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:400-405
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to study the effects of the tree species on the germination of corp seed in agro-forestry ecosystem, chosing the paulownia and poplar as research object, the leach liquor from paulownia and poplar leaves was extracted through the way of whipping and liquation. The leaves aqueous extracts were used to study allelopathic effects on the germination of wheat, corn and soybean. The results showed that: (1) it obviously produced inhibition on germination rate of soybean once the density of paulownia and poplar leaves aqueous extracts to the point of 50 mg/mL; when the density of poplar leaves aqueous extracts to 10 mg/mL and the density of paulownia leaves aqueous extracts over 20 mg/mL, it caused the obviously inhibition on germination rate of wheat and corn. (2) the allelopathic effects of poplar leaves aqueous extracts on the three kinds of crops (RI=15.147) were more than paulownia(RI=13.973); (3) the allelopathic inhibitory effects of poplar and paulownia leaves aqueous extracts were ranked as: wheat>corn>soybean. With the increasing of density of poplar and paulownia leaves aqueous extracts, the allelopathic inhibitory effects become more and more powerful and the germination rate of crops get lower.
Number of references:27
Main heading:Solvent extraction
Controlled terms:Crops - Ecosystems - Forestry - Leaching - Seed
Uncontrolled terms:Agroforestry - Allelopathic effects - Allelopathy - Aqueous extracts - Germination rates - Inhibitory effect - Leach liquors - Paulownia - Poplar - Research object - Seed germination - Tree species - Water extract
Classification code:454.3 Ecology and Ecosystems - 802.3 Chemical Operations - 821.0 Woodlands and Forestry - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.z1.071
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523670Title:Extraction of polysaccharides from Laminaria Japonica by ultrasonic-associated enzyme method and its antimicrobial activity
Authors:Xu, Yang (1); Yang, Baowei (1); Chai, Bohua (1); Zhang, Jing (1); Li, Yanli (1); Meng, Jianghong (1)
Author affiliation:(1) College of Food Science and Engineering, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Yang, B.
(ybwsheng@nwsuaf.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:356-362
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:The optimum condition of extraction of polysaccharides by ultrasonic-associated enzyme method and the antimicrobial activity of the polysaccharides as well as their chemical modified products to common foodborne pathogens were studied to provide information to application of polysaccharides in food additives and biological control. Single-factor and orthogonal experiments were used to determined the optimum conditions of polysaccharides extraction by ultrasonic-associated cellulase and neutral proteinase method. The oxidation depolymerization and acetylation were acquired by chemical modified polysaccharides. The antibacterial activity of polysaccharides, oxidation depolymerization and acetylation to 8 different foodborne pathogens, including 3 kinds of molds and 5 kinds of bacteria, were determined by disk-diffusion method. The optimum parameters of ultrasonic-associated enzyme method were pH at 4.5, extracting temperature at 50°C, enzyme compounds including cellulose and neutral proteinase with a ratio of 2:1 value at 2.25% accompanied to extract with 75 min, under this condition, polysaccharides extraction rate was up to 8.64%. Laminaria japonica polysaccharides can inhibit the growth of Escherichia coli, Salmonella, Staphylococcus aureus and Enterococcus faecalis in a certain extent, but have no inhibitory effects on Shigella. The oxidation depolymerization and acetylated fucoidan of Laminaria japonica polysaccharides show more significant inhibitory activity against those foodborne pathogens than Laminaria japonica polysaccharides, and has inhibitory effect on Shigella. However, three polysaccharides have no inhibitory activity on 3 experimental molds, namely Penicillium, Rhizopus and Aspergillus niger.
Number of references:26
Main heading:Polysaccharides
Controlled terms:Acetylation - Catalysts - Chemical contamination - Chemical modification - Enzymes - Escherichia coli - Microorganisms - Molds - Oxidation - Ultrasonic waves - Ultrasonics
Uncontrolled terms:Anti-bacterial activity - Anti-microbial activity - Aspergillus niger - Biological controls - Diffusion method - Enterococcus faecalis - Extraction rate - Food-borne pathogens - Fucoidans - Inhibitory activity - Inhibitory effect - Laminaria japonica - Modified products - Optimum conditions - Optimum parameters - Orthogonal experiment - Staphylococcus aureus
Classification code:816.2 Plants and Machinery for Plastics and Other Polymers - 804.1 Organic Compounds - 804 Chemical Products Generally - 822.3 Food Products - 803 Chemical Agents and Basic Industrial Chemicals - 753.1 Ultrasonic Waves - 461.9 Biology - 802.2 Chemical Reactions
DOI:10.3969/j.issn.1002-6819.2010.z1.063
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523669Title:Experiments on osmotic dehydration of carrot at vacuum pressure
Authors:Xu, Yingying (1); Yuan, Yuejin (1); Zhang, Yanhua (1); Li, Shigang (2); Dang, Xin-An (1)
Author affiliation:(1) College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; (2) Beijing Vocational College of Labour and Social Security, Beijing 100029, China
Corresponding author:Dang, X.-A.
(dangxa@sust.edu.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:350-355
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:In order to obtain the optimum process conditions of carrot vacuum osmotic dehydration, the effects of slice thickness, vacuum degree, solute liquid concentration and temperature on carrot vacuum osmotic dehydration were investigated by experiment. The results indicated that the osmotic dehydration efficiency was improved obviously at vacuum condition. The carrot dehydration and solid gain rate increased with decreasing slice thickness and increasing vacuum degree, concentration and temperature of sucrose solution. The increasing rate of solid gain rate was higher than the dehydration rate obviously when the vacuum degree was decreased to about 10 kPa. The optimized technological parameters of carrot osmotic dehydration at pulsed vacuum pressure were 4mm slice thickness, 30 kPa vacuum degree, 60% solute liquid concentration and 40°C temperature. The weight loss rate reached 40.1% under the above conditions and osmotic dehydration time 240 minute. These research results provided technical basis for carrot drying pretreatment.
Number of references:15
Main heading:Dehydration
Controlled terms:Agricultural products - Dewatering - Experiments - Liquids - Osmosis - Sugar (sucrose) - Vacuum - Vacuum technology
Uncontrolled terms:Dehydration rates - Drying pretreatment - Liquid concentration - Optimum process conditions - Osmotic dehydration - Pulsed vacuum - Research results - Slice thickness - Sucrose solution - Technological parameters - Vacuum condition - Vacuum degree - Vacuum pressure - Weight loss rates
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 822.3 Food Products - 821.4 Agricultural Products - 802.3 Chemical Operations - 802.2 Chemical Reactions - 633 Vacuum Technology
DOI:10.3969/j.issn.1002-6819.2010.z1.062
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523639Title:Potential productivity of wheat and maize in grain production center of Henan Province based on GIS
Authors:Ma, Xinming (1); Zhang, Hao (2); Xiong, Shuping (1); Xu, Xin (2); Zhao, Qiaomei (3)
Author affiliation:(1) College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China; (2) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China; (3) Weather Bureau of Xuchang City, Xuchang 461000, China
Corresponding author:Ma, X.
(xinmingma@126.com)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:162-168
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:With mechanism method, natural potential productivity (light, temperature, water and soil) of wheat and maize in the grain core area of Henan Province was studied. The results showed that there is larger potential to increase the yield of wheat and maize. Furthermore, the potential to increase the yield of maize was much higher than that of wheat, for each potential index for maize productivity was higher than that of wheat, including temperature, weather, and soil. The counties with medium maize yield have larger potential of photosynthesis and temperature than counties with higher and lower maize yield, and the later regions have larger potential of weather and soil than the former. Though the preponderant region of each potential index for wheat and maize was completely different, the general trend was that the largest potential and realistic yield were both in the north and middle region of Henan Province, followed by the east and south-east region, and the lowest potential was in the west and south-west region. The key of building the grain core area of Henan Province is to develop the weather and soil potential of wheat and maize productivity.
Number of references:23
Main heading:Grain (agricultural product)
Controlled terms:Crops - Geographic information systems - Productivity - Soils
Uncontrolled terms:Core area - Geographic information - Henan Province - Maize - Natural potential - Wheat
Classification code:483.1 Soils and Soil Mechanics - 723.3 Database Systems - 821.4 Agricultural Products - 913.1 Production Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.031
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523631Title:Response of physiological characteristics of pepper leaf to different light intensities and soil moisture contents
Authors:Peng, Qiang (1); Liang, Yinli (1); Chen, Chen (1); Jia, Wenyan (1); Tian, Zhiguo (1); Hao, Wanglin (1); Wu, Xing (1)
Author affiliation:(1) College of Foresty, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, China
Corresponding author:Liang, Y.
(liangyl@ms.iswc.ac.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:115-121
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:This study object was to define the influences of different light intensities and soil moisture contents on the leaf relative water content (RWC), chlorophyll (Chl) content, activity of protective enzymes, free proline and malondialdehyde content (MDA) with hot pepper plants. The results showed that: 1) RWC and Chl content increased gradually with the enhancement of shading and soil moisture. The increased of soil moisture was mainly beneficial to the increase in chlorophyll a, while shading contributed mainly to the increment in chlorophyll b. Carotenoids contents depressed with the increasing of shading and the decline of soil moisture. MDA content increased under drought stress, and existed quadratic trend with the increase of shading levels. In the same light level, protective enzymes activity and proline content showed degrees of increase under drought and high water condition, but decreased with the increased of the shading in the same soil moisture conditions, and the protective enzyme sensitivity to light intensity was: SOD>CAT>POD. 2) There was a significantly positive correlation between protective enzyme and MDA, and a significantly negative correlation between protective enzyme and Chlorophyll content. Conclusively, taking shading 30% and soil relative water content of 70%-85% as the appropriate shading and irrigation indicators are scientific and rational.
Number of references:21
Main heading:Water content
Controlled terms:Aldehydes - Amino acids - Catalysts - Chlorophyll - Drought - Enzyme activity - Enzymes - Lipids - Moisture determination - Oxidation - Physiological models - Physiology - Plants (botany) - Soil moisture
Uncontrolled terms:Chlorophyll a - Chlorophyll contents - Drought stress - Free proline - High water - Hot pepper plants - Leaf relative water contents - Light intensity - Light level - Malondialdehyde - Membrane lipid peroxidation - Moisture conditions - Negative correlation - Pepper - Physiological characteristics - Positive correlations - Protective enzymes - Relative water content - Soil moisture content
Classification code:944.2 Moisture Measurements - 804.1 Organic Compounds - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.2 Chemical Reactions - 483.1 Soils and Soil Mechanics - 461.9 Biology - 461.1 Biomedical Engineering - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.z1.023
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

Accession number:20105213523635Title:Effects of soil surface roughness on sheet erosion and change under different rainfall conditions
Authors:Zheng, Zicheng (1); He, Shuqin (4); Wu, Faqi (2)
Author affiliation:(1) College of Resources and Environment, Sichuan Agricultural University, Yaan 625014, China; (2) College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; (4) College of Forestry, Sichuan Agricultural University, Yaan 625014, China
Corresponding author:Zheng, Z.
(zichengzheng@yahoo.com.cn)

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:SUPPL. 1
Issue date:October 2010
Publication year:2010
Pages:139-145
Language:Chinese
ISSN:10026819
CODEN:NGOXEO
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China
Abstract:To further determine the effects of soil surface roughness on sheet erosion, changes of soil surface roughness were obtained under the single and continuous rainfall intensities based on the artificial rainfall simulation experiments. The results showed that under the rainfall intensity of 0.67 mm/min, the runoff amount and sediment yield of each slope decreased firstly, and then the stable change with the increasing soil surface roughness. Soil surface roughness declined for other artificial management practices except for hoeing cropland, opposite to the changes of contrast slope. Under the rainfall intensity of 1.63 mm/min, the runoff amount and sediment yield of each slope decreased with the increasing soil surface roughness. Soil surface roughness decreased for the slope of digging cropland and contour tillage, consistent to the changes of contrast slope. While soil surface roughness increased for the slope of hoeing cropland and raking cropland, opposite to the changes of contrast slope. Under the continuous rainfall intensity, the runoff amount and sediment yield of artificial management practices decreased gradually with the increasing soil surface roughness, and were lower than those of the contrast slope at the first and second rainfall. The changes of runoff amount and sediment yield were comparatively complex, and sediment yields of the slope with artificial management practices were higher than those of contrast slope at the third rainfall. The results will provide theory basis for posing the erosion nature of roughness, and at the same time, it will serve for harnessing soil and water loss of the slope farmland in Loess Plateau.
Number of references:25
Main heading:Rain
Controlled terms:Agriculture - Erosion - Metal analysis - Roughness measurement - Runoff - Sedimentology - Soils - Surface properties - Surface roughness
Uncontrolled terms:Artificial rainfall - Loess Plateau - Management practices - Rainfall condition - Rainfall intensity - Sediment yields - Sheet erosion - Soil and water loss - Soil surfaces
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 801 Chemistry - 531 Metallurgy and Metallography - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 481.1 Geology - 444.1 Surface Water - 443.3 Precipitation - 407 Maritime and Port Structures; Rivers and Other Waterways - 406 Highway Engineering
DOI:10.3969/j.issn.1002-6819.2010.z1.027
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

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