<RECORD 1>

Accession number:20104313334613Title:Measurement and analysis of precompression stress of soil in rice field
Authors:Li, Chunlin (1); Ding, Qishuo (1); Chen, Qingchun (1)
Author affiliation:(1) Collage of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Ding, Q.
      (qsding@njau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:141-144
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:Pre-consolidation pressure was usually measured by fast uni-axial compression test on confined cylindrical soil, the determination of which provided a basis reference for soil structure protection and a theoretical foundation for the correct selection of axial load, as well as the design and field application of agricultural machineries. A field experiment was conducted in Nanjing Jiangpu farm to measure the pre-consolidation pressure. Its value was 58.84-69.19 kPa for undisturbed soil and 69.15-100.1 kPa for compacted soil with a tractor. The results showed that wheel rolling increased soil pre-consolidation pressure and thus destroyed soil structure. The currently used agricultural machineries usually have a contacting pressure of 70 kPa above, while the measured value was around 60 kPa. It is concluded that the application of these machineries will caused soil compaction and soil structure destruction.
Number of references:30
Main heading:Soil surveys
Controlled terms:Agricultural machinery - Compaction - Compression testing - Instruments - Machine design - Soil mechanics - Soil testing - Soils - Stress measurement
Uncontrolled terms:Compacted soil - Field application - Field experiment - Measurement and analysis - Nanjing - Pre-compression - Preconsolidation pressure - Rice fields - Soil compaction - Soil structure  - Theoretical foundations - Undisturbed soils - Uni-axial compression - Void ratios - Wheel rolling
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 821.1 Agricultural Machinery and Equipment - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 601 Mechanical Design - 483.1 Soils and Soil Mechanics - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 536.1 Powder Metallurgy Operations
DOI:10.3969/j.issn.1002-6819.2010.08.024
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 2>

Accession number:20104313334617Title:Retrieving the spatial-explicit harvest index for winter wheat from NDVI time series data
Authors:Ren, Jianqiang (1); Chen, Zhongxin (1); Zhou, Qingbo (1); Tang, Huajun (1)
Author affiliation:(1) Key Laboratory of Resources Remote Sensing and Digital Agriculture, Ministry of Agriculture, Beijing 100081, China; (2) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Corresponding author:Chen, Z.
      (zxchen@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:8
Issue date:August 2010
Publication year:2010
Pages:160-167
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:Crop harvest index (HI) is critical to crop yield estimation and prediction. In this paper, a novel technique to extract spatial-explicit HI information for winter wheat from remotely sensed data was developed. Based on the understanding of the intrinsic features of HI and crop phenology expressed by NDVI time series data, a derivative index HI<inf>NDVI-SUM</inf> for the inversion of HI from remotely sensed data was devised. HI<inf>NDVI-SUM</inf> was defined as the ratio between accumulated 10-day NDVI for reproductive and vegetative stages of winter wheat. Then the relationship between HI<inf>NDVI-SUM</inf> and the in-situ HI of winter wheat was tested in the study area in North China Plain. Finally, the established relationship to retrieve the spatial-explicit crop harvest index information from remote sensing data was applied in the study area. After validation, the accuracy of the retrieved HI of winter wheat was satisfactory. The mean relative error of the retrieved crop HI was only 2.40% and RMSE was only 0.02. It was shown that the method developed to construct HI<inf>NDVI-SUM</inf> and extract the harvest index for winter wheat from MODIS NDVI time-series data was feasible and reliable.
Number of references:30
Main heading:Crops
Controlled terms:Harvesting - Remote sensing - Time series
Uncontrolled terms:Crop phenology - Crop yield - Harvest index - In-situ - Intrinsic features - Mean relative error - NDVI - NDVI time series - North China Plain - Novel techniques  - Remote sensing data - Remotely sensed data - Study areas - Time-series data - Winter wheat - Yield
Classification code:731.1 Control Systems - 821.3 Agricultural Methods - 821.4 Agricultural Products - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.08.028
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 3>

Accession number:20104313334616Title:Influences of vegetation coverage and residual stubble height on preventing resistance to wind erosion effect of conservation tillage farmland
Authors:Sun, Yuechao (1); Ma, Shuoshi (2); Chen, Zhi (2); Zhao, Yonglai (1); Su, Jie (1)
Author affiliation:(1) Vocational and Technical College, Inner Mongolia Agricultural University, Baotou 014109, China; (2) College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China
Corresponding author:Chen, Z.
      (chz6653@sohu.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:156-159
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 quantitatively evaluate the preventing wind erosion effect of conservation tillage farmland affected by vegetation coverage and residual stubble height, aerodynamics roughness and resistance to wind erosion efficiency were made as evaluation index. In-situ test was conducted at conversation tillage and autumn-ploughed farmland by using movable wind erosion tunnel in Wuchuan County in Inner Mongolia. It is showed that aerodynamics roughness and resistance to wind erosion efficiency increase and the effect on preventing wind erosion strengthens with the increase of vegetation coverage and residual stubble height. The average resistance to wind erosion efficiency of conversation tillage farmland can reach 80.55%. It has a good resistance to wind erosion efficiency, when the residual stubble height is 30 cm and vegetation coverage is 50%. So, conservation tillage farmland should have more than 50% vegetation coverage and 30 cm residual stubble height to prevent and treatment soil wind erosion of farmland efficiently.
Number of references:18
Main heading:Soil conservation
Controlled terms:Aerodynamics - Agricultural machinery - Erosion - Farms - Soils - Vegetation - Wind effects
Uncontrolled terms:Conservation tillage - Efficiency increase - Evaluation index - In-situ test - Inner Mongolia - Soil wind erosion - Stubble height - Vegetation coverage - Wind erosions
Classification code:821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 651.1 Aerodynamics, General - 483.1 Soils and Soil Mechanics - 483 Soil Mechanics and Foundations - 443.1 Atmospheric Properties - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.08.027
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 4>

Accession number:20104313334630Title:Scale optimization of greenhouse agricultural rainwater harvesting and utilization project
Authors:Ji, Wenhua (1); Cai, Jianming (1); Wang, Zhiping (3); Wang, Kewu (3)
Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; (2) College of Resources Environment and Earth Sciences, Yunnan University, Kunming 650091, China; (3) Beijing Agro-Technical Extension Centre, Beijing 100029, China
Corresponding author:Cai, J.
      (caijm@igsnrr.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:248-253
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:Rainwater harvesting project by agricultural greenhouse could provide reliable water source for urban agriculture around water scarce cities. However, guiding theory of optimal size for water storage pool is absent. It will lower the efficiency and benefit of rainwater harvesting project. To provide water for agriculture and enhance economic feasibility of rainwater harvesting project, principle and methodology for optimizing storage pool was developed in this paper. Research on existing agricultural rainwater harvesting project showed that rainwater harvesting efficiency was influenced by difference of daily rainfall and size of storage pool. In the case of certain rainfall and catchment area, the amount of rainwater harvested increases with increasing of storage pool. But the amount by unit volume of storage pool decreased. Cost-benefit analysis showed that the ratio of benefit to cost of the project was relatively high when design daily rainfall is around 25-40 mm. And rainwater harvested could almost meet water need. A case study showed, in normal year, the actual rainwater harvesting rate was slightly lower than the designed rainwater harvesting rate due to temporal distribution of rainfall and agricultural water use. And the ratio of benefit to cost was far lower than that of the project at optimal scale. Thus properly reduction of size of the storage pool could improve the economy of the project. The methodology can provide theory and practical guidance for agricultural rainwater harvesting project.
Number of references:19
Main heading:Cost benefit analysis
Controlled terms:Catchments - Cost effectiveness - Costs - Greenhouses - Harvesting - Lakes - Optimization - Rain - Water supply
Uncontrolled terms:Agricultural greenhouse - Agricultural water use - Catchment area - Daily rainfall - Economic feasibilities - Efficiency and benefit - Optimal scale - Optimal size - Practical guidance - Rain water harvesting  - Storage pool - Temporal distribution - Unit volume - Water needs - Water scarce - Water source - Water storage
Classification code:921.5 Optimization Techniques - 911.2 Industrial Economics - 911 Cost and Value Engineering; Industrial Economics - 821.6 Farm Buildings and Other Structures - 821.3 Agricultural Methods - 446.1 Water Supply Systems - 444 Water Resources - 443.3 Precipitation - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.08.042
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 5>

Accession number:20104313334596Title:Effects of wide-ridge and narrow-row no-till cultivation on soil water and maize yield
Authors:Wang, Qingjie (1); Li, Hongwen (1); He, Jin (1); Li, Wenying (1); Liu, Andong (2)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) Liaoning Institute of Agricultural Mechanization Technology Extension, Shenyang 110034, China
Corresponding author:Li, H.
      (lhwen@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:8
Issue date:August 2010
Publication year:2010
Pages:39-43
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 resolve the problems faced while no-till seeding on the original ridge and to avoid instability of planter, the furrow was covered by soil to form wide-ridge. The field experiment was conducted at Sujiatun in Liaoning Province in 2007-2009, and the effects of wide-ridge with wide-narrow row no-till cultivation on soil bulk density, soil water content, maize growth and water use efficiency were also studied. The results indicated that wide-ridge with wide-narrow row no-till seeding could increase the capacity of water storage and water content by 9.39%-11.03% in the seeding stage. Compared with average ridge row, the population structure was improved effectively under wide-ridge with wide-narrow row no-till cultivation. From the study it was also found that the growth of individual plants was better, dry matter accumulation and LAI were enhanced. The yield was increased by 6.70%-9.49%, and the soil water use efficiency was improved by 4.96%-8.56%. It was a perfect planting mode for conservation tillage in the northeast of China.
Number of references:12
Main heading:Soil conservation
Controlled terms:Agriculture - Moisture determination - Seed - Soil moisture - Underwater soils - Water content - Water supply
Uncontrolled terms:Maize - Ridge till - Wide-narrow row - Wide-ridge - Yield
Classification code:444 Water Resources - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 944.2 Moisture Measurements
DOI:10.3969/j.issn.1002-6819.2010.08.006
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 6>

Accession number:20104313334649Title:Application of electron spin resonance spectroscopy in detection of irradiated grapes
Authors:Li, Weiming (1); Ha, Yiming (1); Wang, Feng (1); Zhang, Yanli (2)
Author affiliation:(1) Institute of Agro-Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (2) National Institute of Metrology P.R. China, Beijing 100013, China
Corresponding author:Ha, Y.
      (hayiming@sina.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:363-367
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 detect irradiated grapes by electron spin resonance(ESR)spectroscopy, the grape skins, grape stalks and grape seeds were used as test materials to study the feature changes of ESR spectrum and the relationship between ESR intensity and irradiation dose in the range of 0 to 10 kGy. The results showed that the ESR spectra of grape skins, grape stalks and grape seeds were obviously different before and after irradiation, the intensity of ESR signal increased with the increasing of the absorbed dose. The grape stalks which had the minimum detection limit (0.25 kGy) could be used as an ideal experimental material to identify whether or not grapes had been irradiated. By comparing the dose effect curves of grape skins, grape stalks and grape seeds, it was concluded that grape stalk curves showed the most accurate (R²=0.9943). The ESR intensity of three kinds of irradiated samples all decreased during the storage time (15 d), grape skins showed severest attenuation (attenuation 80%). The results could provide the technical basis for the application of ESR spectroscopy in detecting irradiated grapes.
Number of references:18
Main heading:Electron spin resonance spectroscopy
Controlled terms:Electrons - Fruits - Irradiation - Paramagnetic resonance - Resonance - Seed - Signal detection - Spin dynamics
Uncontrolled terms:Absorbed dose - Before and after - Detection limits - Dose effects - Electron spin resonance - ESR spectra - ESR spectroscopy - Experimental materials - Grape seeds - Grape skin  - Grape stalk - Irradiated samples - Irradiation dose - Signal intensities - Storage - Storage time - Test materials
Classification code:701 Electricity and Magnetism - 711.1 Electromagnetic Waves in Different Media - 716.1 Information Theory and Signal Processing - 801 Chemistry - 801.4 Physical Chemistry - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.08.061
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 7>

Accession number:20104313334648Title:Effects of different cooling methods on core browning and membrane fatty acid components of postharvest Yali pears with different harvest periods
Authors:Yan, Shijie (1); Liang, Liya (1); Chen, Jiluan (2); Li, Xiaodan (1); Hu, Xiaosong (3)
Author affiliation:(1) Food Science Department, Tianjin Agricultural University, Tianjin 300384, China; (2) Food College, Xinjiang Shihezi University, Shihezi 832003, China; (3) College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Hu, X.
      (huxiaos@hotmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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:In order to investigate the mechanism that slow cooling inhibits the browning of Yali pears after harvest, the effect of different cooling methods on membrane fatty acid components, contents, phase transition temperature, lipoxygenase (LOX) activity and browning of core of Yali pears with different harvest period were studied. The results showed that fatty acid components of core contained lauric acid, tetradecanoic acid, palmitic acid, palmitoleic acid, perlatolic acid, stearic acid, oleic acid, linoleic acid, linolenic acid. And the contents of linoleic acid, palmitic acid and oleic acid were more. Slow cooling increased linolenic acid and linoleic acid relative contents and unsaturated-saturated fatty acid ratio (U/S) value, reduced the phase transition temperature, significantly inhibited LOX activity and browning of the core of early harvested Yali pears. Late harvest increased the U/S value, reduced the phase transition temperature of the core. But because the harvest period was later, fruits senesced more quickly, LOX activity rose quickly in the late period, and membrane lipid peroxidation got serious. All these changes mentioned above finally made the late harvested fruits much easier to get browning. In a word, early harvesting and slow cooling could increase the contents of unsaturated fatty acid and U/S value, restrain the core browning of Yali pear after harvest.
Number of references:19
Main heading:Phase transitions
Controlled terms:Cooling - Fruits - Harvesting - Oleic acid - Stearic acid - Temperature
Uncontrolled terms:Cooling methods - Late harvest - Lauric acid - Linoleic acid - Linolenic acids - Lipoxygenases - LOX activity - Membrane lipid peroxidation - Palmitic acid - Palmitoleic acid  - Phase transition temperatures - Postharvest - Saturated fatty acid - Slow cooling - Storage - Tetradecanoic acid - Unsaturated fatty acids - Yali pear
Classification code:641.1 Thermodynamics - 641.2 Heat Transfer - 804.1 Organic Compounds - 821.3 Agricultural Methods - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.08.060
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 8>

Accession number:20104313334619Title:Extracting oasis landscape multi-seasonal characteristics with linear spectral mixture analysis
Authors:Liu, Na (1); Li, Hong (2); Sun, Danfeng (1); Zhou, Liandi (2)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (2) Institute of System Comprehensive Development, Beijing Academy of Agriculture and Forest Science, Beijing 100097, China
Corresponding author:Sun, D.
      (sundf@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:8
Issue date:August 2010
Publication year:2010
Pages:174-182
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 frangibility of eco-environment and interference of socio-economy in arid and semi-arid areas often causes high tendency to land degradation and distinct variations in regional landscape between seasons. Moreover, constrained to the spatial resolution of remotely sensed data, high spatial heterogeneity of landscape indicating desertification status often exists in the form of mixture pixels with remote sensing assessment. Hence, traditional methods including pixel-based classification have their limitations. This paper taking Minqin as an example expanded the linear mixture analysis based on multi-seasonal data for extracting seasonal characteristics of desertification heterogeneity including determination of types of end-members, selection of multi-seasonal representative end-members and optimization of end-member spectra. The results indicated that the multi-seasonal linear mixture model allowing for the comparability between seasons and physical meaning of decomposition results could be interpreted physically and effectively simulate the distribution of landscape elements in Minqin oasis and the estimated end-member fractions of seasons could describe seasonal variations of oasis landscape, which could offer support for land desertification dynamic assessment.
Number of references:28
Main heading:Principal component analysis
Controlled terms:Arid regions - Climatology - Image processing - Imaging systems - Mixtures - Optimization - Pixels - Remote sensing - Weathering
Uncontrolled terms:End-member type - Linear spectral mixture analysis - Minqin oasis - Principal Components - Seasonal characteristics - Spectral optimization
Classification code:922.2 Mathematical Statistics - 921.5 Optimization Techniques - 802.3 Chemical Operations - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723.5 Computer Applications - 443 Meteorology - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.08.030
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 9>

Accession number:20104313334642Title:Optimized parameters and quality analysis of salty and crisp peanut by far-infrared roasting
Authors:Chen, Tuanwei (1); Kang, Binbin (2); Chen, Shaojun (1); Chen, Huibin (1); Lin, Hetong (1)
Author affiliation:(1) College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (2) Department of Bio-engineering, Fujian Polytechnic Institute, Fuzhou 350002, China
Corresponding author:Lin, H.
      (hetonglin@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:320-325
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 quality of salty and crisp peanut, the optimized parameters of salty and crisp peanut by far-infrared roasting using orthogonal design, and the quality changes of salty and crisp peanut during roasting were investigated. The results showed as follows: the optimized parameter for far-infrared roasting was 0.312 kg/kW peanut roasted at 130&deg;C for 2.5 h. During peanut roasting, the acid value (AV) and peroxide value (POV) in salty and crisp peanut increased slowly, which would not significant affect its quality under the optimized parameter by far-infrared roasting. Whereas, contents of reducing sugars and free amino acids decreased for maillard reaction during roasting, which was beneficial to roasting flavor of salty and crisp peanut, and activities of lipoxygenase (LOX) and the anti-nutritional factors such as trypsin inhibitor in peanut (PTI) also declined. LOX activity was completely inactivated when salty and crisp peanut roasted at 130&deg;C for 0.5 h, and PTI activity was almost completely inactivated when salty and crisp peanut roasted at 130&deg;C for 2.5 h. The inactivation of activities of LOX and PTI could improve storing stability and edible quality of salty and crisp peanut.
Number of references:18
Main heading:Quality control
Controlled terms:Agricultural products - Amino acids - Calcination - Optimization - Sugar (sucrose)
Uncontrolled terms:Acid value - Anti-nutritional - Far-infrared - Free amino acids - Lipoxygenases - LOX activity - Maillard reaction - Optimized parameter - Orthogonal design - Peroxide value  - Quality analysis - Quality change - Reducing sugars - Salty and crisp peanut - Trypsin inhibitor
Classification code:461 Bioengineering and Biology - 802.3 Chemical Operations - 821.4 Agricultural Products - 822.3 Food Products - 913.3 Quality Assurance and Control - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.08.054
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 10>

Accession number:20104313334614Title:Numerical analysis of intake uniformity of biogas engine
Authors:Zhang, Qiang (1); Li, Na (2)
Author affiliation:(1) Department of Energy and power Engineering, Shandong University, Jinan 250061, China; (2) Department of Mechanical Engineering, Shandong University, Jinan 250022, China
Corresponding author:Zhang, Q.
      (sduzq01@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:145-149
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:Exploring high-power gas engines to generate electricity by burning biogas as well as other green energy sources has been an important task in current internal combustion enginec industry. The gas engines are sensitive to equality of the charge of every cylinder. The power, emissions and reliability of the gas engines are influenced by the unequal charge frequently. The flow field of intake system of CW6200 gas engine was simulated in this paper by using CFD technique. The intake uniformity of each cylinder was studied by analyzing the pressure field and velocity field of the flow area, and the flow resistance of the intake system was also researched. The optimized intake system was designed by analyzing the calculation results. The numerical analysis and performance tests of the gas engine showed that the gas engine had better power performance when adopting two-stage resonance system. The absolute value of the flow nonuniformity of each cylinder was less than 3 percent, and the absolute value of the exhaust temperature nonuniformity of every cylinder is less than 2.5 percent. So the conclusion can be reached that the two-stage resonance system can improve the intake uniformity of the premixing gas engine effectively and enhance the performance of the engine.
Number of references:18
Main heading:Gas engines
Controlled terms:Alternative fuels - Biogas - Computational fluid dynamics - Engines - Gas emissions - Intake systems - Numerical analysis - Resonance
Uncontrolled terms:Absolute values - Biogas engines - CFD technique - Exhaust temperature - Flow area - Flow resistance - Generate electricity - Green energy sources - High-power - Intake uniformity  - Internal combustion - Nonuniformity - Performance tests - Power performance - Premixing - Pressure field - Two stage - Velocity field
Classification code:921.6 Numerical Methods - 701 Electricity and Magnetism - 631.1 Fluid Flow, General - 612.3 Gas Turbines and Engines - 612 Engines - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 451.1 Air Pollution Sources
DOI:10.3969/j.issn.1002-6819.2010.08.025
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 11>

Accession number:20104313334639Title:Farmland use right transfer and its driving factors in agro-pastoral interlaced region
Authors:Hao, Haiguang (1); Li, Xiubin (1); Tian, Yujun (1); Chen, Yuqi (1)
Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; (2) Graduate University of Chinese Academy of Science, Beijing 100049, China
Corresponding author:Hao, H.
      (haohg.08b@igsnrr.ac.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:302-307
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:Farmland use right transfer between households is essential to the agricultural modernization and national food security and has aroused a wide concern. This article takes Taipusiqi County, Inner Mongolia as an example of agro-pastoral interlaced region, and uses binary logistic model to analyze the driving factors of farmland land transfer due to differences between farmers. Result showed that nearly half of the households in Taipusiqi County transfered in or out cultivated land. Households with more on-farm labors, more agricultural machinery, higher proportion of farming income and husbandry income, were more likely to transfer in farmland, and had much less possibility to transfer out their cultivated land. Because of substitution effect of machinery to labor, off-farm employment promoted farmers to transfer in land. Older farmers were reluctant to expand their farming acreage, while because of the stronger dependence on the land, older farmers also were reluctant to transfer out of their farmland. Educated level and cultivated area per labor had no significant effects on land transfer. So, the implementation of the policy to increase more subsidies for agricultural machinery is significant to promote land use right transfer and large-scale agriculture.
Number of references:26
Main heading:Farms
Controlled terms:Agricultural machinery - Food supply - Land use
Uncontrolled terms:Agro-pastoral interlaced region - Binary logistic model - Cultivated lands - Driving factors - Farm labor - Farmland transfer - Inner Mongolia - Land transfer - National Foods - Off-farm employment  - Regressive analysis - Substitution effect
Classification code:403 Urban and Regional Planning and Development - 404.2 Civil Defense - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment
DOI:10.3969/j.issn.1002-6819.2010.08.051
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 12>

Accession number:20104313334652Title:Construction of cold chain decision support system for aquatic products
Authors:Liu, Lu (1); Yue, Jun (2); Zhang, Jian (3); Fu, Zetian (1)
Author affiliation:(1) College of Engineering, China Agricultural University, Beijing 100083, China; (2) College of Information Science and Engineering, Ludong University, Yantai 264000, China; (3) Economic and Management College, Beijing Information Science and Technology University, Beijing 100192, China
Corresponding author:Fu, Z.
      (zhj001@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:8
Issue date:August 2010
Publication year:2010
Pages:379-384
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 lack of analysis of the relationship between the environmental information and the quality information for the fish in the cold chain, this paper takes the information of aquatic product cold-chain logistics as application object, which could be decomposed into two sets of events and status parameters by the time-temperature data to describe the information during processing, storage and transportation. The decision support information could be acquired by applying this description by the events and states data sets. A diagnostic threshold model for operation standerd criteria and a quality evaluation method according to the time-temerature were proposed to meet the safety analysis of the cold chain. At last, takeing the cold chain logistics of Tilapia as example, the decision-making program of cold chain was constructed. The quality of tilapia could be divided into 5 intervals. Selecting the fourth interval (0.2-0.4) as the safe quality of tilapia by the model, the shelf life of tilapia was 18 days, which was compared with the actual shelf life for 17.13 days by less errors.The results showed that the information of cold chain could be managed effectively by this information analysis method.
Number of references:17
Main heading:Quality control
Controlled terms:Artificial intelligence - Decision making - Decision support systems - Decision theory - Food storage - Health - Information analysis - Quality management
Uncontrolled terms:Aquatic products - Cold chain - Data sets - Decision supports - Environmental information - Food safety - Quality evaluation - Quality evaluation method - Quality information - Safety analysis  - Shelf life - Threshold model - Time-temperature
Classification code:921 Mathematics - 914.3 Industrial Hygiene - 913.3 Quality Assurance and Control - 961 Systems Science - 912.2 Management - 822.1 Food Products Plants and Equipment - 723.4 Artificial Intelligence - 903.1 Information Sources and Analysis
DOI:10.3969/j.issn.1002-6819.2010.08.064
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 13>

Accession number:20104313334625Title:Simulation of fuzzy control for greenhouse temperature based on ANFIS
Authors:Ge, Jiankun (1); Luo, Jinyao (1); Li, Xiaoping (1); Wang, Xueying (1)
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Corresponding author:Ge, J.
      (007gjk007@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:216-221
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 paper deals with the problem of modeling and control of greenhouses inside climate defined by the temperature. According to the thermal balance principle in greenhouse, a non-linear differential model for the air temperature in the greenhouse was constructed. The corresponding fuzzy control system for greenhouse temperature was established by using ANFIS tools of MATLAB, including the choosing of variables, definition of fuzzy sets, quantification of the domain, choosing of membership functions and controller training. After the combination between controller and the controlled object by Simulink, simulations were carried out to analyze the performance of the system. The simulation results testify the validity and reasonability of the fuzzy control strategy for the temperature control in the greenhouse, and the achievement has certain reference value for the development in intelligent control of the greenhouse microclimate.
Number of references:17
Main heading:Computer simulation
Controlled terms:Climate control - Controllers - Fuzzy control - Fuzzy sets - Greenhouse effect - Greenhouses - Membership functions - Temperature control
Uncontrolled terms:Air temperature - ANFIS - Controlled objects - Differential models - Fuzzy control strategy - Greenhouse microclimate - Greenhouse temperature - Modeling and control - Non-linear - Reasonability  - Reference values - Simulation model - Simulation result - Simulink - Thermal balance
Classification code:921 Mathematics - 732.1 Control Equipment - 731.3 Specific Variables Control - 723.5 Computer Applications - 451 Air Pollution - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.08.037
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 14>

Accession number:20104313334637Title:Influence of caragana-straw as nursery substrate on growth and dry matter accumulation of watermelon seedlings
Authors:Qu, Jisong (1); Guo, Wenzhong (1); Zhang, Lijuan (1); Feng, Haiping (1); Yang, Dongyan (1)
Author affiliation:(1) Institute of Germplasm Resources, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750002, China; (2) Center of Ningxia Research on Facility Agricultural Engineering, Yinchuan 750002, China
Corresponding author:Guo, W.
      (guowzh70@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:291-295
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:Influence on the growth and accumulation of dry matter of watermelon seedlings based on caragana-straw as nursery substrate in studies, it used to determine the feasibility of caragana-straw as nursery substrate, to provide theoretical basis for the development of caragana resource and follow-up industry. With "Zhuangmiao-2" nursery for the control matrix, through the matrix physical and chemical properties, seedling growth, dry matter accumulation, parameters of chlorophyll fluorescence induction dynamics and other indicators, effects of two seedlings were compared. The results showed that caragana straw and Zhuangmiao-2 were basically the same of the physical properties, available nutrient content of caragana straw was significantly greater than Zhuangmiao-2, plant height, stem diameter, leaf number, root length, shoot fresh weight, shoot dry weight, root fresh weight, root dry weight, total fresh weight, total dry weight, root/shoot ratio of two seedlings were tends to be uniform, seedling index of caragana-straw seeding was higher than seedling index of Zhuangmiao-2 seeding 9.76%, at the same time the former light use efficiency slightly higher than the latter. Caragana-straw have potential to replace peat as nursery substrate raw material, which will be developed and utilized to be nursery substrate of industrial seedling in northwest arid regions.
Number of references:26
Main heading:Substrates
Controlled terms:Arid regions - Chemical properties - Chlorophyll - Curing - Ecology - Forestry - Indicators (chemical) - Porphyrins - Seed - Weighing
Uncontrolled terms:Caragana Korshinskii - Chorofluroescence - Ecological effect - Growth - Seedling
Classification code:821.4 Agricultural Products - 821.0 Woodlands and Forestry - 815.1 Polymeric Materials - 804.1 Organic Compounds - 804 Chemical Products Generally - 943.3 Special Purpose Instruments - 801 Chemistry - 454.3 Ecology and Ecosystems - 444 Water Resources - 443 Meteorology - 423 Non Mechanical Properties and Tests of Building Materials - 461 Bioengineering and Biology
DOI:10.3969/j.issn.1002-6819.2010.08.049
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 15>

Accession number:20104313334626Title:Detection of navel oranges canker based on hyperspectral imaging technology
Authors:Li, Jiangbo (1); Rao, Xiuqin (1); Ying, Yibin (1); Wang, Dongting (1)
Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author:Rao, X.
      (xqrao@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:8
Issue date:August 2010
Publication year:2010
Pages:222-228
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:Feature bands principal component analysis method and band ratio algorithm were proposed to fast differentiate citrus canker from normal fruit skin and other surface defects based on hyperspectral imaging technology. Navel oranges with cankerous, normal and other nine kinds of common defects were studied. First, region of interests (ROIs) spectral features of various defected peel areas were analyzed and combined with principal component analysis method to determined five optimal bands (i.e. 630, 685, 720, 810 and 875 nm). Next, principal component analysis was again performed based on feature wavelengths and the fifth principal component (PC-5) was used to classify and identify canker lesions on navel oranges. The overall classification success rate was 80% regardless of the presence of other confounding defects. In order to improve classification success rate, feature bands principal component analysis method and band ratio algorithm were combined to detect canker on the surface of navel oranges with an accuracy of 95.4%. The study results show that the hyperspectral imaging technology can be used to effectively classify and identify navel oranges with canker lesions.
Number of references:15
Main heading:Principal component analysis
Controlled terms:Fruits - Image recognition - Imaging techniques - Surface defects
Uncontrolled terms:Canker - Defects inspections - Dual-band - Hyperspectral Imaging - Navel orange - Principal Components
Classification code:951 Materials Science - 922.2 Mathematical Statistics - 821.4 Agricultural Products - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 716 Telecommunication; Radar, Radio and Television - 421 Strength of Building Materials; Mechanical Properties
DOI:10.3969/j.issn.1002-6819.2010.08.038
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 16>

Accession number:20104313334597Title:Soil water conservation effect, yield and income increments of conservation tillage measures on dryland wheat field
Authors:Mao, Hongling (1); Li, Jun (2); Jia, Zhikuan (2); Wang, Lei (3)
Author affiliation:(1) College of Forestry, Northwest Agriculture and Forestry University, Yangling 712100, China; (2) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China; (3) College of Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Li, J.
      (junli@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:8
Issue date:August 2010
Publication year:2010
Pages:44-51
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 study the experiment about effects of different conservation tillage measures on soil water retention in summer fallow and its impact on winter wheat yields and economic returns were conducted on continuous cropping wheat field of Weibei Highland. A field experiment was carried out in 2007-2009 on dryland wheat fields of Weibei Highland. The study included the effects of three tillage treatments (no-tillage, sub-soiling and deep plowing) on soil water conservation in summer fallow, as well as its effects on soil water dynamic during wheat growth period, wheat yield and economic returns under three tillage treatments combined with three fertilizer treatments (balanced fertilization, traditional fertilization and low fertilization). The results showed that no-tillage and sub-soiling had better soil moisture conservation effects than deep plowing in summer fallow. During summer fallow of three trial, average soil water content in 0-300 cm soil layer of no-tillage and sub-soiling treatments were 0.6 and 0.5 percentile higher than that of deep plowing, and average water storage increased 24.2 mm and 21.5mm, respectively. During winter wheat growth period, average water storage in 0-200 cm soil layer of no-tillage and sub-soiling treatments increased 17.7 mm and 14.4 mm, respectively, compared to deep plowing treatment in two wheat growth seasons. Sub-soiling combined with balanced fertilization was the highest yield treatment among all treatments. Its average yield in two wheat production seasons was 5033.1 kg/hm², and it was 5.5% and 6.3% higher than deep plowing and no-tillage combined with balanced fertilization treatments, respectively. No-tillage combined with balanced fertilization was the highest economic benefit treatment among all treatments. Its average net return in two wheat production seasons was 5553.7 yuan/hm², and it was 3.3% and 9.2% higher than sub-soiling and plowing combined with balanced fertilization, respectively. This study comprehensively concluded that considering soil water retention effect, wheat yield increment and economic benefit, sub-soiling combined with balanced fertilization treatments were the preferable conservation tillage and fertilization combination treatments on continuous cropping of dryland wheat field in Weibei Highland.
Number of references:19
Main heading:Soil conservation
Controlled terms:Agricultural machinery - Crops - Experiments - Moisture control - Moisture determination - Soil moisture - Underwater soils - Water conservation - Water content - Water supply
Uncontrolled terms:Average yield - Combination treatments - Conservation tillage - Dryland - Economic benefits - Economic returns - Field experiment - Growth period - Growth season - Moisture conservation  - Net return - No tillage - Soil layer - Soil water content - Soil water dynamics - Soil water retention - Soil-water conservation - Summer fallow - Tillage treatment - Water storage  - Water use efficiency - Wheat fields - Wheat production - Wheat yield - Winter wheat - Yield
Classification code:944.2 Moisture Measurements - 901.3 Engineering Research - 821.4 Agricultural Products - 821.1 Agricultural Machinery and Equipment - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.007
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 17>

Accession number:20104313334623Title:Design and realization of remote monitoring system for soil moisture in citrus orchards
Authors:Fan, Zhiping (1); Hong, Tiansheng (2); Liu, Zhizhuang (2); Li, Jianian (2); Wen, Tao (2)
Author affiliation:(1) College of Computer Science and Educational Software, Guangzhou University, Guangzhou 510006, China; (2) School of Engineering, South China Agricultural University, Guangzhou 510642, 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:8
Issue date:August 2010
Publication year:2010
Pages:205-210
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 finding a way to retrieve, transmit and store data in large-scale, full-coverage soil moisture in citrus orchards, remote monitoring system based on ZigBee and J2EE technology was developed and tested. The XBee-PRO unit with ZigBee wireless data transfer function and soil moisture sensor EC-5 unit as the core of the senor node, and used to take charge of data sampling, preprocessing and wireless transmitting collected data transmitted through the gateway based on ARM9 to the host web. Remote monitoring centre system could achieve data analysis and remote, real-time monitoring. Packet delivery rate (PDR) and time-consuming experiment results indicated that, a stable data transmission was achieved since PDR had a high success rate at 98% and time-consuming less than 100 ms.
Number of references:15
Main heading:Monitoring
Controlled terms:Data reduction - Data transfer - Design - Gateways (computer networks) - Moisture control - Moisture determination - Orchards - Remote control - Soil moisture - Soil surveys
Uncontrolled terms:Citrus orchards - Data analysis - Data sampling - Data transmission - Packet delivery rates - Real time monitoring - Remote monitoring - Remote monitoring system - Soil moisture sensors - Wireless data transfer  - Zig-Bee - ZigBee technology
Classification code:944.2 Moisture Measurements - 731.1 Control Systems - 821.3 Agricultural Methods - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 723.2 Data Processing and Image Processing - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 483.1 Soils and Soil Mechanics - 408 Structural Design - 723 Computer Software, Data Handling and Applications
DOI:10.3969/j.issn.1002-6819.2010.08.035
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 18>

Accession number:20104313334624Title:Simulation and realization of farmland wireless sensor networks nodes deployment
Authors:Sun, Yuwen (1); Shen, Mingxia (1); Zhou, Liang (1); Xiong, Yingjun (1); Lin, Xiangze (1)
Author affiliation:(1) College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Shen, M.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:211-215
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 farmland information collection system which based on the wireless sensor networks, effective deployment of nodes becomes one of the research priorities, due to the is large number of sensor nodes laid in wide area of farmland. NS2 software executed the simulation comparison from the following aspects such as packet loss rate, average delay, the remaining energy of sensor nodes. The hexagonal plan was determined as the final deployment one, and experiments were carried out in the fields. Results showed that the system could achieve seamless coverage, and acquire the field information stably and reliably, which laid the solid foundation for further application infield wireless sensor networks.
Number of references:15
Main heading:Wireless sensor networks
Controlled terms:Computer simulation - Computer software - Environmental testing - Farms - Sensor networks - Sensor nodes - Telecommunication equipment - Wide area networks
Uncontrolled terms:Average delay - Information collections - Node deployment - NS2 software - Packet loss rates - Research priorities - Simulation comparison - Wide area - Wireless sensor
Classification code:732 Control Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 722.3 Data Communication, Equipment and Techniques - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 722 Computer Systems and Equipment - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 454 Environmental Engineering - 718 Telephone Systems and Related Technologies; Line Communications
DOI:10.3969/j.issn.1002-6819.2010.08.036
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 19>

Accession number:20104313334635Title:Effects of rural domestic sewage treatment in Taihu Lake Valley by wetland of plant floating island
Authors:Zhang, Wenyi (1); Yao, Lirong (1); Wang, Liyan (1); Zhao, Tingting (1); Li, Dinglong (1)
Author affiliation:(1) School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
Corresponding author:Zhang, W.
      (zwy@jpu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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:The treatment effects of rural domestic sewage were researched by wetland of plant floating island, choosed four land plants which were Ligustrum lucidum, Ligustrum quihoui Carr, Ilex purpurea Hassk and Cymbidium faberi Rolfe were chosen to make wetland of plant floating island. The results showed that the removal rates of COD, TP and NTU could reach 60%, 65%, 60% and 70%, respectively, in 6 days of retention time under natural conditions simulated. Furthermore, all the removal rates except TP could increase to 80% above and then the retention time could decrease to 5 days by aerating intermittently. The dynamic analysis indicated that the reaction of COD removal followed the first-order reaction in the system of plant floating island with intermittent aerating, and the reaction rate constant K of plants were -0.591 (Ligustrum lucidum) and -0.978 (Cymbidium faberi Rolfe). On the other hand, the degradation process of NH<inf>3</inf>-N met the zero-order reaction. The removal rates of single plant were 46.32 mg/d (Ligustrum lucidum) and 43.76 mg/d (Cymbidium faberi Rolfe). Synergistic effects of plant roots and the biomembrane of the plant surface were good for the degradation of pollutants in sewage. The demonstration project after working continuously for more than a year indicated that the wetland of plant floating island had a better purifying capacity to treat rural domestic sewage in every moment at each season of the year, the effluent water could meet Grade B discharge demands of integrated wastewater discharge standard (GB8978-1996). The study could guide valuably some regions which were analogous or located near south of the Yangtze River to adopt the wetland of plants floating islands to treat rural domestic sewage.
Number of references:19
Main heading:Effluents
Controlled terms:Catchments - Degradation - Dynamic analysis - Lakes - Rate constants - Rural areas - Sewage - Sewage treatment - Sewage treatment plants - Wastewater  - Wastewater treatment - Water analysis - Wetlands
Uncontrolled terms:Biomembranes - COD removal - Constructed wetlands - Cymbidium faberi - Degradation of pollutants - Degradation process - Demonstration project - Domestic sewage - Domestic sewage treatment - Effluent waters  - First order reactions - Floating islands - Grade B - Land plants - Natural conditions - Order reactions - Plant roots - Plant surfaces - Plants - Removal rate  - Retention time - Single plants - Synergistic effect - Taihu lakes - Treatment effects - Wastewater discharge - Yangtze River
Classification code:802.2 Chemical Reactions - 801 Chemistry - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 444 Water Resources - 422.2 Strength of Building Materials : Test Methods - 407 Maritime and Port Structures; Rivers and Other Waterways - 442.2 Land Reclamation
DOI:10.3969/j.issn.1002-6819.2010.08.047
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 20>

Accession number:20104313334618Title:Remote sensing monitoring models of soil salinization based on NDVI-SI feature space
Authors:Wang, Fei (1); Ding, Jianli (1); Wu, Manchun (1)
Author affiliation:(1) College of Resource and Environmental Science, Xinjiang University, Urumqi 830046, China; (2) Key Laboratory for Oasis Ecology, Xinjiang University, Urumqi 830046, China; (3) Graduate School of Xinjiang University, Urumqi 830046, China
Corresponding author:Ding, J.
      (watarid@xju.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:168-173
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 vegetation and soil information, remote sensing model was established for extracting soil salinization. In this paper, the Delta oasis of Yutian in the south of Tarim Basin was chosen as the case study for its long-term research accumulation. The relationship between salinization index (SI) and normalized difference vegetation index (NDVI) was analyzed synthetically. Through experimental analysis and theoretical derivation, the research proposed a conception of NDVI-SI feature space and discussed its biophysical characteristics. Analysis revealed that location could be used to improve the current strategies for salinization in the NDVI-SI feature space. The research presented a model of salinization detection index (SDI) to monitor severity of salinization. The results showed that the correlation between the SI and soil salt content had a higher accuracy about 0.8596. The SDI values of non-salinized soil, slightly salinized soil, moderately salinized soil and severely salinized soil were 0.399, 0.763, 0.974 and 1.201, respectively. Results of difference matrix indicated that the SDI had a higher separability in difference scale of soil salinization. The SDI demonstrates a much better performance in measuring salinity soil since it takes into account both topsoil spectrum and halophytic vegetation growth condition in the modeling process. The SDI has the potential to provide a simple and low-cost monitoring tool for assessment of salt-affected areas.
Number of references:15
Main heading:Geologic models
Controlled terms:Monitoring - Remote sensing - Research - Soils - Space optics - Vegetation
Uncontrolled terms:Affected area - Biophysical characteristics - Cost monitoring - Difference matrix - Experimental analysis - Feature space - Modeling process - Normalized difference vegetation index - Remote sensing models - Remote sensing monitoring  - Salinization index (SI) - Soil salinization - Soil salt content - Tarim Basin - Vegetation growth
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 901.3 Engineering Research - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 483.1 Soils and Soil Mechanics - 481.1 Geology - 741.1 Light/Optics
DOI:10.3969/j.issn.1002-6819.2010.08.029
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 21>

Accession number:20104313334646Title:Effects of storage temperature on quality changes of cold break tomato paste during storage
Authors:Liu, Fengxia (1); Zhou, Linyan (1); Cao, Xiamin (1); Wang, Houyin (2); Liao, Xiaojun (1)
Author affiliation:(1) Key Laboratory of Fruit and Vegetable Processing Ministry of Agriculture, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) China National Institute of Standardization, Beijing 100088, China
Corresponding author:Liao, X.
      (liaoxjun@hotmail.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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 effects of temperature (0, 25, and 37&deg;C) and storage time (150 days) on the quality changes of cold break tomato paste (CBTP) were investigated in this study, and kinetic analysis to the key indices were carried out to guide the storage of CBTP. Amino acids, total sugar, sucrose, fructose, Vitamin C and color indices (L^*, a^* and b^*) in CBTP stored at 25 and 37&deg;C decreased significantly, while 5-hydroxymethylfurfural (HMF), browning degree (BD) and total color difference &Delta;E increased significantly. The changes of total amino acids, total sugar, Vitamin C, HMF and BD followed a first-order reaction well, and there was linear correlation between HMF and BD. Lycopene and total soluble solids showed no significant changes during storage, while the titratable acidity of the CBTP increased with increasing the storage temperature and time. Vitamin C in CBTP stored at 0&deg;C decreased significantly, while changes of other indices were not significant. All the results indicated that higher storage temperature significantly decreased the quality of CBTP, while lower temperature protected its quality well.
Number of references:27
Main heading:Quality control
Controlled terms:Amino acids - Fruits - Sugar (sucrose) - Temperature
Uncontrolled terms:5 hydroxymethyl furfurals - Color index - Effects of temperature - First order reactions - Kinetic analysis - Linear correlation - Lycopenes - Quality change - Storage - Storage temperatures  - Storage time - Titratable acidity - Tomato paste - Total color difference - Total soluble solids - Total sugars - Vitamin C
Classification code:461 Bioengineering and Biology - 641.1 Thermodynamics - 821.4 Agricultural Products - 822.3 Food Products - 913.3 Quality Assurance and Control
DOI:10.3969/j.issn.1002-6819.2010.08.058
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 22>

Accession number:20104313334611Title:Experimental study on applying biofan to cultivate Penaeus vannamei
Authors:Ding, Xiangwen (1); Zhang, Shuge (1); Sun, Xinchao (2); Zhao, Wanli (3); Gao, Zhenjiang (2)
Author affiliation:(1) Agricultural Mechanization Technology Development and Promotion Station, Ministry of Agriculture, Beijing 100079, China; (2) College of Engineering, China Agricultural University, Beijing 100083, China; (3) Zhuhai Scenery Biofan Environmental Protection Technology Compang Limted, Zhuhai 519015, China
Corresponding author:Zhang, S.
      (sgzhangde@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:8
Issue date:August 2010
Publication year:2010
Pages:130-135
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 a new way in aquaculture, a Penaeus vannamei comparative test was conducted by using Biofan in this paper. In one breeding cycle, water environmental factors such as dissolved oxygen, temperature, pH and nitrite, Penaeus vannamei growth and quality and economic efficiency were analyzed. The results show that comparing with aquaculture without biofan, the method improves water dissolved oxygen uniformity, temperature uniformity and increases the dissolved oxygen content of the pond; maintains the water pH value between 7.6-8.9; reduces the nitrite content in water; improves the Penaeus vannamei growth speed and quality; saves 56.9% on power consumption, 15.5% on bait, 45.4% on drug; increases yield by 20.1% per unit area. Test and analysis results showed that using Biofan can improve water environment, reduce aquaculture costs and increase aquaculture production and income, so it has high value of practical application.
Number of references:15
Main heading:Dissolved oxygen
Controlled terms:Agricultural machinery - Aquaculture - Biochemical oxygen demand - Dissolution - Water content - Water pollution - Water quality
Uncontrolled terms:Biofan - Comparative tests - Dissolved oxygen contents - Economic efficiency - Environmental factors - Experimental studies - Growth speed - Penaeus vannamei - Per unit - pH value  - Power Consumption - Temperature uniformity - Test and analysis - Water environments
Classification code:444 Water Resources - 453 Water Pollution - 453.2 Water Pollution Control - 802.3 Chemical Operations - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods
DOI:10.3969/j.issn.1002-6819.2010.08.022
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 23>

Accession number:20104313334628Title:Construction and implementation of distributed pollution-free agricultural products digital certification system
Authors:Xi, Lei (1); Zhang, Hao (1); Guo, Wei (1); Guo, Yufeng (1); Zhang, Longlong (1); Wen, Nuan (2); Ding, Baohua (3); Ma, Xinming (4)
Author affiliation:(1) College of Information and Management Science, Henan Agricultural University, Zhengzhou 450002, China; (2) College of Economics and Management, Henan Agricultural University, Zhengzhou 450002, China; (3) Agriculture Product Quality Safety Center, Ministry of Agriculture, Beijing 100081, China; (4) Agronomy College, Henan Agricultural University, Zhengzhou 450002, 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:8
Issue date:August 2010
Publication year:2010
Pages:236-242
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:Aiming at the key issue of agricultural product quality safety certification, the integrated workflow of origin cognizance and product certification of pollution-free agricultural products was studied so as to construct a digital certification system of pollution-free agricultural products from the perspective of information technology, with the aim of achieving normalization of the certification flow and improving working efficiency. Through the analysis of certification activities, the authors established the domain environment of two-level nodes of the certification flow, constructed centralized distributed topological structure among the node domains, designed system functions flow under the distributed environment, and discussed the key technologies; Declarer, detection mechanism and administrative departments at all levels oriented digital certification system of distributed pollution-free agricultural products was developed with the combined use of meta-data, workflow and Web Service technology. The system provides the functions of declaration management, certification workflow management, and certification information resource service to achieve the electronic management of full flow and orientation of pollution-free agricultural products certification. After pilot application in Henan Province and the Ministry of Agriculture, the results show that the system has achieved cross-sectoral and cross-boundary teamwork, as well as high efficient management of certification information, having a good prospect of application and popularization.
Number of references:18
Main heading:Agricultural products
Controlled terms:Data flow analysis - Management - Occupational risks - Pollution detection - Registration of engineers - Topology - Web services - Work simplification
Uncontrolled terms:Certification systems - Detection mechanism - Distributed environments - Distributed systems - Electronic management - Henan Province - Information resource - Integrated workflow - Key issues - Key technologies  - Pilot applications - Product certification - Product quality - System functions - Topological structure - Web service technology - Workflow - Workflow managements - Working efficiency
Classification code:454.2 Environmental Impact and Protection - 723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 821.4 Agricultural Products - 912 Industrial Engineering and Management - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.3969/j.issn.1002-6819.2010.08.040
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 24>

Accession number:20104313334593Title:Trends of Chinese dry-wet condition based on wetness index
Authors:Zhao, Junfang (1); Guo, Jianping (1); Xu, Jingwen (2); Mao, Fei (1); Yang, Xiaoguang (3); Zhang, Yanhong (4)
Author affiliation:(1) Chinese Academy of Meteorological Sciences, Beijing 100081, China; (2) College of Resource and Environment, Sichuan Agricultural University, Yaan 625014, China; (3) College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; (4) National Meteorological Center, Beijing 100081, China
Corresponding author:Zhao, J.
      (zhaojf@cams.cma.gov.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:18-24
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:Predicting the temporal and spatial change of Chinese dry-wet condition in the future can provide important theoretical support for developing the national response strategy on climate change, and adjusting the distribution of agricultural production layout. Based on the daily data of A2 climate scenario (2011-2050) and baseline climate condition (1961-1990) from the regional climate model PRECIS with resolution of 50 km &times; 50 km, reference crop evapotranspiration and the wetness index were both calculated and analyzed according to Penman-Monteith equation recommended by FAO. In terms of grades of wetness index from Chinese Climate Classification Criterion, China is classified into severe arid, arid, semi-arid, semi-humid and humid zones, respectively. The possible temporal-spatial changes of dry-wet condition over the country from 2011 to 2050 were analyzed from an agricultural view. The results showed that: the amount of precipitation and reference crop evapotranspiration in the most regions would increase from 2011 to 2050 compared with the baseline climate conditions from 1961 to 1990. However, the inter-regional difference was significant; In the next 40 years, Chinaese climate showed a warming and drying trend in general; The area's reducing trend in the arid and extreme arid region and the expanding trend in the semi-arid region during 2011 to 2050 would be obvious compared with the baseline climatic conditions. Climate would turn wetter in the northwest part of Xinjiang and the areas along the Great Wall and Inner Mongolia; while part of the semi-arid region e.g. southeast Loess Plateau and the central part of Qinghai-Tibet Plateau would become drier.
Number of references:20
Main heading:Climate change
Controlled terms:Arid regions - Climate models - Crops - Curing - Evapotranspiration - Moisture determination - Soil moisture - Water supply
Uncontrolled terms:Agricultural productions - Classification criterion - Climate condition - Climate scenarios - Climatic conditions - Climatic scenarios - Humid zones - Inner Mongolia - Loess Plateau - Penman-Monteith equations  - Qinghai Tibet plateau - Reference crop - Reference crop evapotranspirations - Regional climate models - Regional differences - Semi arid - Semi-arid region - Spatial changes - Temporal and spatial changes - Wet conditions  - Wetness index - Xinjiang
Classification code:921 Mathematics - 821.4 Agricultural Products - 815.1 Polymeric Materials - 483.1 Soils and Soil Mechanics - 944.2 Moisture Measurements - 451 Air Pollution - 444.1 Surface Water - 444 Water Resources - 443 Meteorology - 446.1 Water Supply Systems
DOI:10.3969/j.issn.1002-6819.2010.08.003
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 25>

Accession number:20104313334595Title:Laboratory experiment and simulation on canal seepage through sand interlayer
Authors:Sun, Mei (1); Mao, Xiaomin (1); Chen, Jian (1); Feng, Shaoyuan (1)
Author affiliation:(1) Center for Agricultural Water Research in China, College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Mao, X.
      (maoxiaomin@tsinghua.org.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:33-38
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 understand the canal seepage process under the canal bed with sand interlayer, laboratory experiments were carried out to study the canal seepage in a soil tank with homogenous (sandy loam) and layered (with sand interlayer between the sandy loam layers) canal bed, respectively. The infiltration process and the advancement of wetting front were monitored under different canal water level for the two cases. Mathematical model was established accordingly. Using the saturated-unsaturated flow software HYDRUS-2D, the processes were simulated and examined. The results indicate that the soil water movement model based on traditional Richards Equation is able to depict the soil dynamics with sand interlayer, although the enclosed air may retard the advance of wetting front and bring error to the simulation result; the wetting front would become discontinuous if there was sand interlayer in the canal bed; the sand interlayer show some degree of hampering effect on infiltration if the canal water level is low, however with the increase of canal water level, the sand interlayer tend to enhance the canal seepage.
Number of references:17
Main heading:Canals
Controlled terms:Computer simulation - Experiments - Geologic models - Hydraulic structures - Mathematical models - Numerical analysis - Sand - Seepage - Soil conditioners - Soil mechanics  - Soil moisture - Solute transport - Underwater soils - Water levels - Wetting
Uncontrolled terms:Canal water - HYDRUS-2D - Infiltration process - Laboratory experiments - Layered soils - Richards Equation - Sandy loams - Saturated-unsaturated flow - Simulation result - Soil dynamics  - Soil water movement - Wetting fronts
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 921 Mathematics - 901.3 Engineering Research - 723.5 Computer Applications - 611 Hydroelectric and Tidal Power Plants - 483.1 Soils and Soil Mechanics - 481.1 Geology - 441 Dams and Reservoirs; Hydro Development - 407.2 Waterways - 407 Maritime and Port Structures; Rivers and Other Waterways
DOI:10.3969/j.issn.1002-6819.2010.08.005
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 26>

Accession number:20104413336128Title:Inversion for crop height by small-footprint-waveform Airborne LIDAR
Authors:Zhou, Mengwei (1); Liu, Qinhuo (1); Liu, Qiang (1); Xiao, Qing (1)
Author affiliation:(1) State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences, Beijing Normal University, Beijing 100101, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Corresponding author:Liu, Q.
      (qhliu@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:8
Issue date:August 2010
Publication year:2010
Pages:183-188
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:Due to limited vertical resolution, the waveform of vegetation whose height is relatively low will superpose on soil waveform. Therefore, LIDAR full-waveform data is mainly used in forestry, but no research in the crops. In this paper, in order to derive crop height, a gaussian decomposition algorithm based on transmitting waveform was adopted to distinguish the crop waveform from soil waveform, and to extract peak location and pulse width from raw waveform data. The method was proved a reliable and high accurate decomposition algorithm. Moreover, the decomposition algorithm lays the proper foundation for obtaining other crop biophysical parameters.
Number of references:21
Main heading:Crops
Controlled terms:Algorithms - Gaussian distribution - Optical radar - Soils - Waveform analysis
Uncontrolled terms:Airborne LiDAR - Biophysical parameters - Crop height - Decomposition algorithm - Full-waveform data - Gaussian decomposition - LIDAR - Pulse width - Vertical resolution - Wave forms  - Waveform data
Classification code:483.1 Soils and Soil Mechanics - 716.2 Radar Systems and Equipment - 821.4 Agricultural Products - 921 Mathematics - 922.1 Probability Theory
DOI:10.3969/j.issn.1002-6819.2010.08.031
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 27>

Accession number:20104313334615Title:Effects of rotational tillage on soil physical properties and winter wheat yield
Authors:Kong, Fanlei (1); Chen, Fu (1); Zhang, Hailin (1); Huang, Guanghui (1)
Author affiliation:(1) Key Laboratory of Crop Cultivation and Farming System, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, China
Corresponding author:Chen, F.
      (chenfu@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:8
Issue date:August 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:Conservation tillage in Northern China was very common. However, many problems occurred for winter wheat fields with long-term no tillage, which was not favorable to winter wheat growth. In order to solve those problems, rotational tillage was introduced in this study. Rotational tillages were conducted in the winter wheat field with five years no-tillage under the wheat/corn double-cropping system. Treatments were NT (NT-NT), CT (NT-CT) and RT (NT-RT), respectively. The treatments were cultivated before sowing the winter wheat. Results showed as follows: Rotational tillages (CT, RT) after long-term no tillage significantly reduced soil bulk density; RT significantly reduced the soil bulk density at 0-10 cm layer While CT decreased at 0-20 cm soil layer. Differences of bulk density decreased with the growth of winter wheat. Rotational tillages significantly increased the soil total porosity at 0-10 cm layer, while CT significantly increased at the 10-20 cm soil layer. CT and RT increased soil capillary porosity at 5-10 cm layer. The soil saturated hydraulic conductivity at 0-10 cm soil layer was significantly higher for CT and RT than that for NT at 5% level, while that from the highest to the lowest were CT, RT, NT at 10-20 and 20-30 cm soil layers. And the soil saturated hydraulic conductivity of CT at 10-20 cm soil layer was significantly higher than NT at 5% level. The soil saturated hydraulic conductivity showed a significant negative linear correlation with soil bulk density. Rotational tillages significantly increased the effective panicle number and it was 24.1% higher in CT, 22.3% higher in RT compared with the NT. Yields from the highest to the lowest were RT, CT, NT. The yield of winter wheat was 11.8% higher in CT, 16.9% higher in RT compared with the NT treatment. After long-term no-tillage soil tillage can improve soil physical properties and increase crop yield.
Number of references:22
Main heading:Soils
Controlled terms:Agricultural machinery - Agriculture - Hydraulic conductivity - Physical properties - Soil conservation
Uncontrolled terms:Bulk density - Capillary porosity - Conservation tillage - Crop yield - Cropping systems - Linear correlation - No tillage - Northern China - Panicle number - Reduced soils  - Rotational tillage - Saturated hydraulic conductivity - Soil bulk density - Soil layer - Soil physical property - Soil tillage - Total porosity - Winter wheat - Winter wheat field
Classification code:483.1 Soils and Soil Mechanics - 632.1 Hydraulics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2010.08.026
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 28>

Accession number:20104313334627Title:Remote sensing monitoring severity level of cotton verticillium wilt based on partial least squares regressive analysis
Authors:Jing, Xia (1); Huang, Wenjiang (2); Ju, Cunyong (3); Xu, Xingang (2)
Author affiliation:(1) College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China; (2) National Engineering Research Center For Information Technology In Agriculture, Beijing 100097, China; (3) College of Forestry, Northeast Forestry University, Harbin 150040, China
Corresponding author:Huang, W.
      (huangwj@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:8
Issue date:August 2010
Publication year:2010
Pages:229-235
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 estimate the severity level of cotton verticillium wilt using high spatial resolution satellite data and partial least-squares regressive analysis. Firstly, remote sensing factors for monitoring cotton verticillium wilt were picked out by the pre-processed IKONOS image. Then the variable factors were selected according to an approach of Variable Importance in Projection, and used to establish the severity estimating model of cotton verticillium wilt using partial least squares (PLS) regression analysis. Finally the model was applied to calculate the severity level of each pixel in the region of cotton verticillium wilt. The results show that these vegetation indices, i.e. enhanced vegetation index (EVI), renormalized difference vegetation index (RDVI), global environment monitoring index (GEMI), difference vegetation index (DVI), modified soil adjusted vegetation index (MSAVI) and normalized difference vegetation index (NDVI), are sensitive factors for monitoring severity level of cotton verticillium wilt. The model based on those variables achieves better accuracy since precision assessment indices such as determination coefficient (R²), root mean square error (RMSE) and relative error (RE) which are 0.78, 0.45 and 9.2% respectively. Severity level of cotton verticillium wilt can be effectively estimated utilizing high spatial resolution image and partial least squares regression analysis and the result presents an important reference approach for further monitoring crop pests and diseases at large scale using airborne and airspace remote sensing data.
Number of references:27
Main heading:Vegetation
Controlled terms:Cotton - Image resolution - Monitoring - Regression analysis - Remote sensing
Uncontrolled terms:High spatial resolution - Partial least squares - Remote sensing monitoring - Severity level - Verticillium wilt
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.2 Mathematical Statistics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821.4 Agricultural Products - 742 Cameras and Photography - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.3969/j.issn.1002-6819.2010.08.039
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 29>

Accession number:20104313334600Title:Effects of different irrigation methods on water distribution and nitrate nitrogen transport of cucumber in greenhouse
Authors:Wei, Yan (1); Sun, Liping (1); Wang, Shuzhong (2); Wang, Yongquan (2); Zhang, Zhenxian (1); Chen, Qingyun (1); Ren, Huazhong (1); Gao, Lihong (1)
Author affiliation:(1) College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China; (2) Beijing Agro-Technical Extension Station, Beijing 100101, China
Corresponding author:Gao, L.
      (gaolh@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:8
Issue date:August 2010
Publication year:2010
Pages:67-72
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 reveal the effects of different irrigation methods on water distribution and nitrate nitrogen transport in solar greenhouse, border irrigation, drip irrigation and subsurface irrigation were evaluated by using cucumber Jinyu No.5. Irrigation water distribution, nitrate leaching, root zone nitrate nitrogen transport, root distribution, yield and water use efficiency were conducted in the current study. The experiments showed that the amount of leaching and evaporation decreased but transpiration increased under drip irrigation and subsurface irrigation. As the results, compared to border irrigation, the above irrigation systems saved water by 25.9% and 32.0%, cucumber yield increased by 11.6% and 15.3% and water use efficiency (WUE) increased by 49.9% and 68.7%, respectively. The drip irrigation and subsurface irrigation also reduced the amount of nitrate leaching, and it was important to protect groundwater.
Number of references:14
Main heading:Subirrigation
Controlled terms:Greenhouses - Groundwater - Leaching - Nitrates - Nitrogen - Transpiration - Water supply - Water supply systems
Uncontrolled terms:Border irrigation - Cucumber - Drip irrigation - Irrigation methods - Irrigation systems - Irrigation waters - Nitrate leaching - Nitrate nitrogen - NO<inf>3</inf>-N - Root distribution  - Root zone - Solar greenhouse - Water distributions - Water-use efficiency - WUE - Yield
Classification code:821.3 Agricultural Methods - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 821.6 Farm Buildings and Other Structures - 643 Space Heating, Ventilation and Air Conditioning - 446.1 Water Supply Systems - 444.2 Groundwater - 533.1 Ore Treatment
DOI:10.3969/j.issn.1002-6819.2010.08.011
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 30>

Accession number:20104313334612Title:Construction technology on RAS for shrimp culture
Authors:Yang, Jing (1); Ni, Qi (1); Zhang, Yulei (1); Xu, Baorong (3)
Author affiliation:(1) Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, China; (2) Laboratory of Fishery Equipment and Engineering, Ministry of Agriculture, Shanghai 200092, China; (3) Qingdao Baorong Aquatic Science and Technology Development Company, Qingdao 266318, China
Corresponding author:Yang, J.
      (yjing0312@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:136-140
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 paper is focused on the construction technology of an economical recirculating aquaculture systems used for raising shrimp (Lieopenaeus vanamei) with microalgae. Original water used for the system was sea water, which would be oxygenated in the pond outside. Culture density was 500 spieces/m². By the culture test, an economical mode was developed. In the early period, blower was used for aeration to supply the oxygen demand and the water was not reused. In the middle period, after about 15 days, all the water treatment devices were started and the water was fully reused. In the last period, oxygenation was added into the system. During the culture period, about 90 days, average dissolved oxygen concentration in the water was about 5.1 mg/L, TAN concentration changed between 0.002-0.15 mg/L, pH 7.62-8.29. The cultural test has obtained a good result, final shrimp output in the cultural tank were about 4.6 kg/m², and the cost was very low. For raising 1 kg shrimp, 1000 L water and 2.16 kW &middot h electricity was cost.
Number of references:25
Main heading:Wastewater reclamation
Controlled terms:Aquaculture - Biochemical oxygen demand - Dissolved oxygen - Oxygen supply - Oxygenation - Seawater - Water treatment
Uncontrolled terms:Construction technologies - Dissolved oxygen concentrations - Micro-algae - Oxygen demand - Recirculating aquaculture - Recirculating aquaculture system - Shrimp - Shrimp culture - System
Classification code:804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 471.5 Sea as Source of Minerals and Food - 471.4 Seawater, Tides and Waves - 453 Water Pollution - 452.4 Industrial Wastes Treatment and Disposal - 445.1 Water Treatment Techniques - 445 Water Treatment - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.023
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 31>

Accession number:20104313334609Title:Energy consumption analysis of electro-hydraulic power steering system based on hardware-in-loop simulation test
Authors:Chen, Yong (1); Chang, L&#252; (2); Xia, Jingjing (2)
Author affiliation:(1) School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Department of Transportation Engineering, Huaiyin Institute of Technology, Huaian 223002, China
Corresponding author:Chen, Y.
      (chenyong94@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:117-122
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 factors of the energy consumption in the EHPS (electro-hydraulic power steering) system, hardware-in-loop simulation test bench was built. The test bench included a master platform, a steering wheel driving module, a test system module and steering resistance's hydraulic loading modules. Energy consumption of main components of a certain type of EHPS system was tested by the bench, and the key factors of the energy consumption were studied by simulating the country road situation. The results showed that the energy consumption in EHPS system were significantly impacted by standby power, hydraulic oil temperature, viscosity, pressure drop of steering valve, as well as power of the steering rack. The research is benefit to development of new energy-saving EHPS system.
Number of references:15
Main heading:Automobile steering equipment
Controlled terms:Automobile parts and equipment - Energy conservation - Energy utilization - Hydraulic machinery - Hydraulics - Leakage (fluid) - Steering - Vehicle parts and equipment
Uncontrolled terms:Country roads - Electro-hydraulic power steering - Energy consumption - Energy consumption analysis - Energy saving - Hardware-in-loop simulation - Hydraulic loading - Hydraulic oil - Key factors - Main component  - Standby power - Steering racks - Steering wheel - Test benches - Test systems
Classification code:663.2 Heavy Duty Motor Vehicle Components - 663.1 Heavy Duty Motor Vehicles - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 525.3 Energy Utilization - 525.2 Energy Conservation - 452.3 Industrial Wastes
DOI:10.3969/j.issn.1002-6819.2010.08.020
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 32>

Accession number:20104313334594Title:Effects of irrigation times and sea-ice water with different salt concentrations on soil water and yield of cotton
Authors:Wu, Xueping (1); Zheng, Yan (1); Liu, Enke (2); Wang, Xiaobing (1); Zhao, Quansheng (1); Cha, Yan (1); Cai, Dianxiong (1); Bai, Yang (1); Hu, Yujiao (1)
Author affiliation:(1) Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (2) Key Laboratory of Dryland Farming, Ministry of Agricultural of China, Beijing 100081, China; (3) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, 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:8
Issue date:August 2010
Publication year:2010
Pages:25-32
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 sea-ice water irrigation technology in the region near Bohai of China, the field micro-plot experiment was conducted to research soil moisture change and cotton yields using sea-ice water with different irrigation times and five salt concentrations (1, 3, 5L, 7 and 9 g/L) in 2008. The results showed that sea-ice water irrigation could improve soil moisture, especially during preplanting and seedling stage. The soil moisture content increased by about 22.85%-31.32% compared with CK (no irrigation) under the irrigation amount of 450 m³/hm² each time could effectively relieve spring drought in cotton field. The cotton yields, boll number per plant and boll weight were the highest with sea-ice water of 1 g/L salt concentration (irrigated 3 times), which increased cotton yields by 38.63% compared with CK. The sea ice water of 3 g/L salt content (irrigated 2 times) increased yields by 29.8%. The cotton yields had decreasing trends with increased salt concentration of sea ice water used. The yields reduction rate with sea-ice water of 9 g/L salt concentration (irrigated 3 times) was 28.48% compared with CK (no irrigation). considering the desalinization technology, which and the long effects of salt concentrations of sea-ice water on soil and cotton yields, the results showed that sea-ice water of 3 g/L salt concentration could be used for cotton irrigation, in combination with drainage practices. In normal rain years, the sea-ice water could be irrigatted for cotton crops two times (before seedtime and at seedling stage) and irrigaton quantity was 450 m³/hm² each time.
Number of references:25
Main heading:Seawater
Controlled terms:Concentration (process) - Cotton - Irrigation - Moisture determination - Oceanography - Salinity measurement - Sea ice - Soil moisture - Underwater soils - Water content
Uncontrolled terms:Boll weights - Cotton yield - Ice water - Reduction rate - Salinity water - Salt concentration - Salt content - Soil moisture content - Soil water - Yield
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 802.3 Chemical Operations - 944.2 Moisture Measurements - 483.1 Soils and Soil Mechanics - 471.1 Oceanography, General - 444 Water Resources - 471.4 Seawater, Tides and Waves
DOI:10.3969/j.issn.1002-6819.2010.08.004
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 33>

Accession number:20104313334603Title:Prediction for soil moisture in tobacco fields based on PCA and RBF neural network
Authors:Chen, Changhua (1); Tan, Jun (2); Yin, Jiankang (3); Zhang, Fei (3); Yao, Jin (1)
Author affiliation:(1) School of Business Administration, Sichuan University, Chengdu 610065, China; (2) School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China; (3) Tobacco Companies of Sichuan Liangshan Prefecture, Xichang 615000, China
Corresponding author:Yao, J.
      (jinyao163@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:85-90
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 build prediction model of the soil moisture so as to easy to plan and manage tobacco planting for tobacco fields, authors presented a method with the principal component analysis (PCA) and radial basis function (RBF) neural network model for predicting the soil moisture of tobacco fields. Firstly, the PCA was used to eliminate the correlation of the initial input layer data so that the problem of efficiency caused by too many input parameters and by too large network scale in neural network modeling could be solved. And then, the prediction model of soil moisture was built through taking the results of PCA as inputs of the RBF neural network. The research result showed that the model proposed had a better prediction accuracy that the average prediction accuracy reached 96.02%, and enhanced 5.20% and 6.06% compared with the conventional back propagation (BP) network and RBF network respectively, which met the requirements of actual tobacco-growing area planting planning and provided a theoretical reference for other types of soil moisture forecasting.
Number of references:20
Main heading:Neural networks
Controlled terms:Attitude control - Backpropagation - Forecasting - Geologic models - Mathematical models - Moisture determination - Principal component analysis - Radial basis function networks - Soil moisture - Tobacco
Uncontrolled terms:Backpropagation network - Input layers - Input parameter - Large networks - Neural network modeling - Prediction accuracy - Prediction model - Principal component analysis (PCA) - Radial basis function neural networks - Radial basis functions  - RBF Network - RBF Neural Network - Research results
Classification code:922.2 Mathematical Statistics - 921 Mathematics - 821.4 Agricultural Products - 944.2 Moisture Measurements - 723.4 Artificial Intelligence - 483.1 Soils and Soil Mechanics - 481.1 Geology - 656.1 Space Flight
DOI:10.3969/j.issn.1002-6819.2010.08.014
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 34>

Accession number:20104313334644Title:Optimization of spray drying technology in processing banana powder
Authors:Chen, Qicong (1); Huang, Huihua (1); Wang, Juan (1); Hu, Kai (1); Zeng, Linlin (1)
Author affiliation:(1) College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China
Corresponding author:Huang, H.
      (fehhuang@scut.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:331-337
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 order to establish the processing technology of banana powder, effects of three spray drying technological parameters, namely inlet air temperature, drying air flow rate and compressed air flow rate, as well as drying aid content, on spray drying of banana powder were analyzed by Box-Behnken response surface methodology. Results showed that the productivity was highest and reached 44.28% under the optimal processing parameters of the inlet air temperature 170.0&deg;C, drying air flow rate 36.08 m³/h and compressed air flow rate 489.70 L/h, with 60% maltodextrin and 1% gum arabic were used as drying aid, and the qualities of the product were good. Thus it can be concluded that it is possible to produce banana powder efficiently with the technology of spray drying.
Number of references:19
Main heading:Glass transition
Controlled terms:Atmospheric temperature - Cold storage - Compressed air - Curing - Fruits - Glass - Inlet flow - Optimization - Pneumatics - Pressure vessels  - Spray drying - Surface properties - Technology - Thermal load
Uncontrolled terms:Box-Behnken - Drying air - Glass transition temperature - Gum arabic - Inlet air temperatures - Maltodextrins - Optimal processing parameters - Processing technologies - Response surface - Response Surface Methodology  - Spray drying technology - Technological parameters
Classification code:951 Materials Science - 812.1 Ceramics - 812.3 Glass - 815.1 Polymeric Materials - 821.4 Agricultural Products - 901 Engineering Profession - 921.5 Optimization Techniques - 804 Chemical Products Generally - 643.1 Space Heating - 632.3 Pneumatics - 631.1 Fluid Flow, General - 619.2 Tanks - 443.1 Atmospheric Properties - 694.4 Storage
DOI:10.3969/j.issn.1002-6819.2010.08.056
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 35>

Accession number:20104313334636Title:Kinetic model for nitrate removal from saline water using polybutylene succinate as energy source
Authors:Lai, Caisheng (1); Tan, Hongxin (1); Luo, Guozhi (1); Ruan, Yunjie (1); Li, Ping (1); Zhou, Wei (1); Sun, Dachuan (1)
Author affiliation:(1) College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
Corresponding author:Tan, H.
      (hxtan@shou.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:285-290
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 insoluble biodegradable polymers pellets that constituted with polybutylene succinate were investigated as the simultaneous solid carbon source and the biofilm carrier for the nitrate removal in synthetic saline wastewater. The denitrification performance and kinetic procedure were evaluated as plug-flow mode in order to provide the technical parameters for potential-applications in recirculating aquaculture system (RAS). The experimental results indicated that hydraulic retention time played an important role on the nitrate removal efficiency. The maximum nitrate volumetric removal rate of 0.21 kg/(m³ &middot d) was achieved at an influent loading rate of 0.32 kg/(m³ &middot d), when the temperature was (29 &plusmn; 1)&deg;C and the nitrate concentrations of 25-236 mg/L, respectively. Under influent loading rate below 0.32 kg/(m³ &middot d), the nitrate volumetric removal rate increased linearly with the influent loading rate, and the maximum nitrate volumetric removal rate was achieved at 0.21 kg/(m³ &middot d) when the influent loading rate at 0.32 kg/(m³ &middot d). Further increasing of loading rate results in the declined performance and nitrite accumulate in effluent, respectively. The kinetic results show that the denitrification procedure of polybutylene succinate as the solid carbon source and the biofilm carrier follow first-order rate. Based on the kinetics characteristics, constants n and K were deduced by used of Eckenfelder model, which could be applied successfully for the prediction of effluent nitrate concentration. The verification of kinetic model was demonstrated validly that could be applied for the design and management of the RAS.
Number of references:21
Main heading:Nitrogen removal
Controlled terms:Biodegradable polymers - Biofilms - Denitrification - Dewatering - Effluents - Kinetic theory - Loading - Nitrates - Saline water - Wastewater
Uncontrolled terms:Biofilm carriers - Energy source - First-order rates - Flow modes - Hydraulic retention time - Kinetic models - Kinetics characteristics - Kinetics models - Loading rate - Nitrate concentration  - Nitrate removal - PBS - Polybutylene succinate - Recirculating aquaculture system - Removal rate - Saline wastewater - Solid carbon source - Solid carbon sources
Classification code:931.1 Mechanics - 804.2 Inorganic Compounds - 802.3 Chemical Operations - 802.2 Chemical Reactions - 672 Naval Vessels - 462.5 Biomaterials (including synthetics) - 454 Environmental Engineering - 452.3 Industrial Wastes - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.048
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 36>

Accession number:20104313334591Title:Risk assessment of flood and drought in major grain-producing areas based on information diffusion theory
Authors:Liu, Yabin (1); Liu, Liming (1); Xu, Di (2); Zhang, Shaohui (2)
Author affiliation:(1) College of Resources and Environment, China Agricultural University, Beijing 100193, China; (2) China Institute of Water Resources and Hydropower Research, Beijing 100048, China
Corresponding author:Liu, L.
      (liulm@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:8
Issue date:August 2010
Publication year:2010
Pages:1-7
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:Flood and drought are important factors which influence stable supply of major grain-producing areas, and threat food self-sufficient security in China. In this paper, flood and drought risk of 13 major grain-producing provinces were assessed by using information diffusion theory. Flood and drought risk level was analyzed under four different of hazard context. At the same time, flood and drought risk conditions were systematically compared, as well as time-space distribution. The results showed that, pressures of flood and drought risk in 13 major grain-producing provinces were all bigger, and drought risk was more serious than flood risk. Flood risk was more serious in southern major grain-producing province and drought risk was more serious at northern and the Yellow-Huaihe-Haihe Plain in major grain-producing province of China. The study on risk assessment of flood and drought provides support for risk prevention and decision-making.
Number of references:18
Main heading:Floods
Controlled terms:Decision making - Diffusion - Drought - Risk assessment
Uncontrolled terms:Flood risks - Information diffusion - Major grain-producing areas - Risk levels - Risk prevention - Time-space distribution
Classification code:444 Water Resources - 912.2 Management - 914.1 Accidents and Accident Prevention - 922.1 Probability Theory - 931.1 Mechanics
DOI:10.3969/j.issn.1002-6819.2010.08.001
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 37>

Accession number:20104313334592Title:Simulation and prediction of rotational irrigation with salty and fresh water in the Hetao irrigation area of Inner Mongolia
Authors:Yang, Shuqing (1); Ye, Zhigang (1); Shi, Haibin (1); Lan, Youting (2)
Author affiliation:(1) Water Conservancy and Civil Engineering College of Inner Mongolia Agricultural University, Hohhot, 010018, China; (2) Hulunbeier Design Institute of Water Conversation and Hydroelectric Engineering Exploration, Hulunbeier 021000, China
Corresponding author:Yang, S.
      (nmndysq@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:8-17
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:For exploring a rotational irrigation model with the salty and fresh water which fits the feature of the Hetao irrigation area in Inner Mongolia and affects the regional soil and underground water enviroment most lightly, with the prediction of the regional enviroment variety with long-term salty and fresh water irrigation, coupling model and algorithm described unsaturated-saturated soil water and salt movement is established, based on the field experiment and spatial structural zone by soil water and salt information. The verification of calibration results to the coupling model turns out that the values calculated by model and the measured actual fit well. Coupling model can make circulation calculation smoothly, with error below allowable range, as shows the great reliability of the coupling model. Numerical simulation study of irrigation model with the salty and fresh water, based on the coupling model, indicates that "fresh-salty-salty" Rotational Irrigation pattern minimizes the effect environmental impact to regional soil and underground water environment to other patterns. Adopting "fresh-salty-salty" pattern as long-term light salty water irrigation, the desalting amount in growth period is larger than that in non-fertile period. The salt mainly drains away the region via ditch system. The soil is desalting generally. The level of underground water declines little in the stimulating period. Salinity of underground water and salt in the aquifer are downtrend. With the reduction of the Yellow River water, "fresh-salty-salty" pattern provides a way to maintain the sustainable development of regional environment. The coupling model provides reference and simple practical way for the implement to the region where the water-saving improvement project is implement and the prediction of the regional water and soil environment with utilization of the brackish water.
Number of references:26
Main heading:Geologic models
Controlled terms:Aquifers - Computer simulation - Desalination - Environmental impact - Forecasting - Irrigation - Soil moisture - Underwater soils - Water - Water conservation
Uncontrolled terms:Brackish water - Coupling models - Field experiment - Fresh Water - Growth period - Inner Mongolia - Irrigation area - Irrigation patterns - Numerical simulation studies - Rotational irrigation model with the salty and fresh  - Salty water - Saturated soils - Soil environment - Soil water - Underground water - Water environment effect - Water-saving - Yellow river
Classification code:921 Mathematics - 821.3 Agricultural Methods - 723.5 Computer Applications - 483.1 Soils and Soil Mechanics - 481.1 Geology - 454.2 Environmental Impact and Protection - 445.1 Water Treatment Techniques - 444.2 Groundwater - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.002
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 38>

Accession number:20104313334629Title:Distributed generation optimal placing approach in rural power network
Authors:Meng, Xiaofang (1); Piao, Zailin (1); Xie, Dongguang (2); Shi, Minghui (1)
Author affiliation:(1) College of Information and Electric Engineering, Shenyang Agricultural University, Shenyang 110161, China; (2) College of Electric Engineering, Northeast Danli University, Jilin 132012, China
Corresponding author:Piao, Z.
      (piaozl@china.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:242-247
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 power quality, reliability, economical and energy efficiency. It is inevitable developing trend that distributed generation (DG) is applied in the rural power network .The type of DG adapted to our country was given, and a method of placing DG was advanced in rural distribution systems. After building integrated evaluating model to node voltage, power network loss and short-circuit current, the node priority was employed to describe the DG's effect. According to the annual minimum electric power loss and economic benefit after placing DG, the sitting and sizing of DG was determined under certain node priority. The method proposed was applied to a real main line in rural distribution systems for illustration, based on the same total capacity, effects of electric power loss and node voltage were calculated and compared by single, double and three sites of DG. The results showed that the power loss was significantly reduced, the node voltage was greatly improved, and it was lightly affected the operation of rural power grid. The results illustrate the correctness and availability of the proposed algorithm to place DG in rural power network.
Number of references:17
Main heading:Electric generators
Controlled terms:Electric lines - Electric losses - Electric network analysis - Energy efficiency - Galerkin methods - Power generation - Switching circuits
Uncontrolled terms:Distributed generations - Economic and social benefit - Electric networks - Node priority - Rural distribution systems
Classification code:721.3 Computer Circuits - 706.2 Electric Power Lines and Equipment - 706 Electric Transmission and Distribution - 921.6 Numerical Methods - 705.2 Electric Generators - 701.1 Electricity: Basic Concepts and Phenomena - 525.2 Energy Conservation - 703.1.1 Electric Network Analysis
DOI:10.3969/j.issn.1002-6819.2010.08.041
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 39>

Accession number:20104313334602Title:Maize crop-water model under condition of supplemental irrigation with harvested rainwater
Authors:Li, Xing (1); Gou, Mangmang (2); Cheng, Manjin (2); Wang, Yong (1)
Author affiliation:(1) Inner Mongolia Engineering Research Center for Water-saving Agriculture, Inner Mongolia Normal University, Hohhot 010022, China; (2) Institute of Water Conservancy Science, Inner Mongolia, Huhhot 010020, China
Corresponding author:Li, X.
      (lixingmm@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:8
Issue date:August 2010
Publication year:2010
Pages:80-84
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:There are some ecological problems in semi-arid areas of the Loess Plateau,such as abominable ecological environment, heavy soil and water loss,unbalanced annual rainfall. Meanwhile rainwater is very limit to collect and store by using rainwater-harvesting engineering and the amount of supplementary irrigation was 18 mm each time. The purposes of this paper were to study the influence degree about supplementary irrigation on maize yield in very independent growth period and find out sensitive period of under supplemental irrigation with water harvesting, to response relationships between yield and water under different stages by mathematical model. Taking ET<inf>min</inf>/ET<inf>a</inf> as relative evapotranspiration (deformed based on Jensen Model), the effects of some factors on model were eliminated by using relative yield and relative evapotranspiration. Relative yield and evapotranspiration were taken as input and output sample of BP Neural Network model, through a large number of compared training and analyzing, to establish model of maize response to water under supplemental irrigation with water harvesting. Meanwhile, compared and verified among the measured value, BP Neural Network model and the deformed Jensen model were coupled in this model. The results showed that simulation accuracy of the BP Neural Network model was higher obviously than the deformed Jensen model, which could reflect sensitivity of water demand in each growing stage and forecast maize yield. The disadvantages of the model were also discussed in the paper.
Number of references:19
Main heading:Computer simulation
Controlled terms:Arid regions - Crops - Ecology - Evapotranspiration - Flow of water - Harvesting - Heavy water - Irrigation - Mathematical models - Neural networks  - Runoff - Water conservation - Water supply
Uncontrolled terms:Annual rainfall - BP neural network model - Ecological environments - Ecological problem - Growth period - Influence degree - Input and outputs - Loess Plateau - Maize yield - Semiarid area  - Simulation accuracy - Soil and water loss - Supplemental irrigation - Water demand - Water harvesting - Water models
Classification code:821.4 Agricultural Products - 821.3 Agricultural Methods - 804 Chemical Products Generally - 723.5 Computer Applications - 723.4 Artificial Intelligence - 921 Mathematics - 631.1.1 Liquid Dynamics - 446.1 Water Supply Systems - 444.1 Surface Water - 444 Water Resources - 443 Meteorology - 454.3 Ecology and Ecosystems
DOI:10.3969/j.issn.1002-6819.2010.08.013
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 40>

Accession number:20104313334605Title:Effects of polyacrylamides with different hydrolysis degrees and molecular weights on water holding capacity of sandy yellow soil
Authors:Wang, Yongmin (1); Li, Junying (1); Wang, Dingyong (1)
Author affiliation:(1) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, College of Resource and Environment, Southwest University, Chongqing 400716, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing 400716, China
Corresponding author:Wang, D.
      (dywang@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:8
Issue date:August 2010
Publication year:2010
Pages:96-101
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 simulation experiment was carried out to identify the optimal polyacrylamide (PAM) formulations (hydrolyis degree, HD; molecular weight, MW) for increasing the water holding capacity of sandy yellow soil distributing widely in Chongqing City. The results indicated that different formulations of PAM could maintain the soil moisture and reduce soil water evaporation rate to some extent. Compared with the control, the treatments amended by PAMs having a MW of 8 million but with different HDs of 10%, 20%, 30%, and 40% reduced the cumulative evaporation rate from sandy yellow soil by a range of 7.76% to 20.17%, while increased the mean soil moisture by a range of 2.65% to 5.96%, with the PAM having a HD of 40% showing the maximum water holding capacity. On the other hand, the treatments amended by PAMs having a HD of 40% but with different MWs of 4, 6, 8, 10 million reduced the cumulative evaporation rate from sandy soils by 14.37% to 20.74%, but increased the mean soil moisture by 4.85% to 6.11% when compared to the control, with the PAM of 10 million MW showing the maximum capacity to hold soil water. Therefore, with the dosage of 0.02% the PAM product with a HD of 40% and a MW of 10 million can be recommended as the optimal formulation for increasing water retention in sandy yellow soil.
Number of references:24
Main heading:Soil moisture
Controlled terms:Evaporation - Hydrolysis - Moisture determination - Molecular weight - Optimization - Phase interfaces - Polyacrylates - Underwater soils
Uncontrolled terms:Chongqing cities - Evaporation rate - Hydrolysis degree - Optimal formulation - Polyacry lamide - Polyacrylamides - Sandy soils - Simulation experiments - Soil water - Soil water evaporation  - Water holding capacity - Water retention - Yellow soil
Classification code:921.5 Optimization Techniques - 815.1.1 Organic Polymers - 802.3 Chemical Operations - 944.2 Moisture Measurements - 802.2 Chemical Reactions - 801 Chemistry - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry
DOI:10.3969/j.issn.1002-6819.2010.08.016
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 41>

Accession number:20104313334601Title:Effects of alternate partial rootzone irrigation on roots activity, stem sap flow and fruit of apple
Authors:Yang, Sumiao (1); Li, Baoguo (1); Qi, Guohui (1); Guo, Suping (1); Hu, Zhiwei (1)
Author affiliation:(1) College of Forestry, Agricultural University of Hebei, Baoding 071000, China
Corresponding author:Li, B.
      (lbg888@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:73-79
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 save irrigation water and improve irrigation patterns, field experiment was conducted in the Taihang Mountain gneiss orchards to evaluate the effects of different irrigation patterns, i.e, 3/4, 1/2, 1/4 alternate partial root-zone irrigation, 1/2 fixed partial root-zone irrigation, conventional border irrigation and non-irrigation on roots activity, stem sap flow, fruit yield and quality of Changfu-2 apple. The results showed that the root activities of which under irrigation area of alternate partial root zone irrigation were higher than that of conventional border irrigation in all period, the average root activity of which under 3/4 alternative irrigation was the highest, and had no significant difference with that of 1/2 alternating irrigation and conventional border irrigation; stem sap flow flux gradually decreased with the reduction of irrigation volume, the minimum irrigation volume to maintain stem sap flow was 1/2; Fruit yield per plant of 1/2 alternating irrigation had reduced by 7.10% as compared to conventional border irrigation, but had no significant difference compared with 3/4 alternative irrigation, and sugar-acid ratio of 1/2 alternating irrigation was the highest. This research suggests that 1/2 alternating irrigation has the potential for use as a high-quality efficient irrigation pattern in gneiss mountain orchards.
Number of references:19
Main heading:Irrigation
Controlled terms:Acids - Fruits - Landforms - Orchards - Quality control - Sugar (sucrose) - Water conservation - Water supply
Uncontrolled terms:Acid ratio - Alternate partial root-zone irrigation - Apple - Border irrigation - Field experiment - Fruit yield - High quality - Irrigation area - Irrigation patterns - Irrigation waters  - Roots activity - Sap flow - Taihang Mountains
Classification code:913.3 Quality Assurance and Control - 822.3 Food Products - 821.4 Agricultural Products - 821.3 Agricultural Methods - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 481.1 Geology - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.012
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 42>

Accession number:20104313334645Title:Design of maize ear solar heating air aeration-drying system based on two-stage drying process
Authors:Zhang, Fengwei (1); Dai, Fei (1); Zhang, Keping (1); Zhao, Wuyun (1); Wang, Fene (1); Feng, Yongzhong (3); Han, Zhengsheng (2)
Author affiliation:(1) School of Engineering, Gansu Agricultural University, Lanzhou 730070, China; (2) College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; (3) College of Agronomy, Northwest Agriculture and Forestry University, Yangling 712100, China
Corresponding author:Han, Z.
      (hanzhengsheng@gsau.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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 use abundant photothermal and the dry air resources to save the energy consumption of the hot- air blast in Northwest China, a set of maize ear solar heating air aeration-drying system based on two-stage drying process was designed, the system was installed on dump flat grain bed to facilitate drying and unloading of maize ear. According to temperature changes in the drying bin, the system could achieve automatic control of the air aeration-drying system. Experiments showed that the system could dry maize ear in short time. It could save 18 hours when compared to traditional drying technology and the average drying rate was also proved to 60.8%. The design of this system provides references for the research of the breeding drying process and the corresponding equipment.
Number of references:15
Main heading:Curing
Controlled terms:Automation - Control - Drying - Energy utilization - Heating - Solar collectors - Solar energy - Solar heating - Unloading
Uncontrolled terms:Automatic control - Dry air - Drying process - Drying rates - Drying systems - Drying technology - Energy consumption - Grain bed - Hot air - Maize ear  - NorthWest China - Photo-thermal - Temperature changes - Two stage
Classification code:815.1 Polymeric Materials - 732 Control Devices - 731 Automatic Control Principles and Applications - 702.3 Solar Cells - 674.1 Small Marine Craft - 643.1 Space Heating - 642.1 Process Heating - 615.2 Solar Power - 525.3 Energy Utilization
DOI:10.3969/j.issn.1002-6819.2010.08.057
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 43>

Accession number:20104313334651Title:Experiment on inhibition of watermelon juice browing by compressed carbon dioxide
Authors:Liu, Ye (1); Zhang, Chao (2); Zhao, Xiaoyan (2); Ma, Yue (2); Li, Wu (2); Liao, Xiaojun (1); Hu, Xiaosong (1)
Author affiliation:(1) Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (2) Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Corresponding author:Hu, X.
      (caucfsne@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:8
Issue date:August 2010
Publication year:2010
Pages:373-378
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:In order to study the inactivation of peroxidase (POD) from watermelon juice by non-thermal technology, the effects of high pressure carbon dioxide (HPCD) treatment on POD activity, color, browning degree, lycopene content, and total polyphenol content of watermelon juice were investigated. In this study, HPCD treatment was performed at 50&deg;C under 8, 15, 22, and 30 MPa, and the treatment time of 2.5, 5, 10, 20, 30 min was applied at each pressure compared to thermal treatment of 50&deg;C. Results showed that HPCD treatment not only inactivated POD activity, but also reduced browning degree of watermelon juice. After HPCD treatment, the content of lycopene reduced slightly (P &lt;0.05), total phenol remained constant (P &gt; 0.05). Moreover, the correlation analysis presented that browning degree of watermelon juice showed positive relation with its POD residual rate, and negative relation with its L^* value. And HPCD treatment of 50 &deg;C, 30 MPa, and 30 min was the better production condition of watermelon juice. Hence, HPCD treatment could inhibit browning of watermelon juice by inactivating POD activity in production.
Number of references:23
Main heading:Quality control
Controlled terms:Agricultural products - Carbon dioxide - Color - High pressure effects - Phenols
Uncontrolled terms:Browning degree - Correlation analysis - High-pressure carbon dioxide - Lycopene content - Lycopenes - Non-thermal technology - Peroxidase (POD) - Polyphenol content - Production condition - Thermal treatment  - Total phenols - Treatment time - Watermelon juice
Classification code:741.1 Light/Optics - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 913.3 Quality Assurance and Control - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.3969/j.issn.1002-6819.2010.08.063
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 44>

Accession number:20104313334650Title:Application of characteristic wavelengths selection in determination of pear firmness by near infrared (NIR) spectroscopy
Authors:Zhu, Weixing (1); Jiang, Hui (1); Chen, Quansheng (2)
Author affiliation:(1) College of Electronic and Information Engineering, Jiangsu University, Zhenjiang 212013, China; (2) School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Chen, Q.
      (chenjiang0518@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:8
Issue date:August 2010
Publication year:2010
Pages:368-372
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 detecting precision and robustness in determination of pear firmness by the FT-NIR spectroscopy, in this research, Synergy interval partial least square coupled with genetic algorithm (siPLS-GA) was used to select the efficient spectral regions and wavelengths in calibrating model. The number of components and the number of variables were implemented by the cross-validation. The performance of the final model was evaluated according to the root mean square error of prediction (RMSEP) and correlation coefficient (R) in prediction and calibration sets. The optimal model based on siPLS-GA was obtained with 10 PLS factors, while 4 spectral regions and 96 variables were selected, respectively. The results of final model show that the optimal model can obtain correlation coefficient of 0.9083, and RMSEP of 0.1573 respectively by a prediction set. The research demonstrated that pear firmness could be determined by NIR spectroscopy technique is feasible, and siPLS-GA the superiority in calibrating model.
Number of references:14
Main heading:Genetic algorithms
Controlled terms:Forecasting - Fruits - Infrared devices - Near infrared spectroscopy - Optimization - Principal component analysis
Uncontrolled terms:Correlation coefficient - Cross validation - Firmness - FT-NIR spectroscopy - Interval partial least squares - NIR spectroscopy - Number of components - Optimal model - Pear - Root-mean-square error of predictions  - Spectral region
Classification code:723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.08.062
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 45>

Accession number:20104313334622Title:Research and application of control system for variable rate fertilizer applicator based on CPLD
Authors:Zhang, Shuhui (1); Qi, Jiangtao (1); Liao, Zongjian (3); Xu, Yan (1)
Author affiliation:(1) Key Laboratory of Bionic Engineering, Jilin University, Changchun 130025, China; (2) Nanjing Institute of Industry Technology, Nanjing 210046, China; (3) Bosch Automotive Products (Suzhou) Co., Ltd, Suzhou 215024, China
Corresponding author:Xu, Y.
      (xuyan@jiu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:200-204
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 performance of the variable rate fertilizer applicator's control system, a control system for a variable rate fertilizer applicator based on the CPLD (complex programmable logic device) was designed and applied in field. Under automatic mode, the system judged the position and the ground speed for the variable rate fertilizer applicator by means of collecting GPS signals. At manual mode, the system judged the ground speed by speed sensor. This system controlled the fertilizer output through combination of a ground speed of fertilizer applicator and prescription data which were given by the Expert System according to the nutrient levels in soil and the theory of yield goal. This system has been applied in the field covering 72 hm² totally in the past 4 years. The error of this system was less than 6%, when the fertilizer sowing amount was 150-600 kg/hm².
Number of references:13
Main heading:Applicators
Controlled terms:Control theory - Expert systems - Fertilizers - Logic devices - Programmable logic controllers - Speed
Uncontrolled terms:Automatic mode - Complex programmable logic device - GPS - GPS signals - Ground speed - In-field - Manual modes - Nutrient levels - Research and application - Speed sensors  - Variable rate fertilization - Variable rate fertilizer applicators
Classification code:931.1 Mechanics - 804 Chemical Products Generally - 732.1 Control Equipment - 731.1 Control Systems - 723.4.1 Expert Systems - 721.2 Logic Elements - 601 Mechanical Design
DOI:10.3969/j.issn.1002-6819.2010.08.034
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 46>

Accession number:20104313334598Title:Study on continuous days of water logging and excessive soil water as drainage index of wheat
Authors:Shao, Guangcheng (1); Yu, Shuang'en (1); Liu, Na (3); Xu, Libo (4)
Author affiliation:(1) Lab. of High-Effective Irrigat. and Drainage and Agric. Water and Soil Environ. in Southern China, Hohai University, Nanjing 210098, China; (2) College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China; (3) School of Economics and Management, Nanjing University of Information Science and Technology, Nanjing 210044, China; (4) Water Affairs and Fishery Industry Bureau of Dingyuan County, Dingyuan 233200, China
Corresponding author:Shao, G.
      (sgcln@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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:To explore the possibility of taking continuous stress-day from surface and subsurface water logging (CSDI) as drainage index during the heading and flowering period of winter wheat, influence of different continuous stress-day from surface and subsurface water logging during heading and flowering period on yield of winter wheat by test pits was studied. Model about relative crop yield and CSDI was established. The results showed that water logging and excessive soil water markedly inhibited leaf photosynthesis stomatal conductance and transpiration rate. The bigger of continuous dynamic state of groundwater, the more serious yield reduction was at the same cumulative depth of surface water. The relative yield decreased with the increase of continuous dynamic state of groundwater, however, the difference among the treatments was not significant. There was better linear relationship between crop relative yield and SEW<inf>50</inf> and CSDI. Weight coefficient of water logging (CW) was a state variable which changed with status of surface and subsurface water logging. It was showed that the utilization of CSDI was reasonable in determination of controlled drainage index under the condition of continuous stress from surface and subsurface water logging.
Number of references:15
Main heading:Geologic models
Controlled terms:Crops - Flood damage - Groundwater - Soil moisture - Underwater soils
Uncontrolled terms:Continuous dynamics - Controlled drainage - Crop yield - Heading and flowering period - Leaf photosynthesis - Linear relationships - Soil water - State variables - Stomatal conductance - Subsurface waters  - Transpiration rates - Water logging - Weight coefficients - Wheat - Winter wheat - Yield reduction
Classification code:406 Highway Engineering - 444.2 Groundwater - 481.1 Geology - 483.1 Soils and Soil Mechanics - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.08.009
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 47>

Accession number:20104313334643Title:Non-destructive detection method of watermelon maturity based on BMV features
Authors:Gao, Guandong (1); Teng, Guifa (2); Xiao, Ke (1); Zhang, Xiaoru (3)
Author affiliation:(1) College of Information Science and Technology, Hebei Agricultural University, Baoding 071001, China; (2) Graduate School, Hebei Agricultural University, Baoding 071001, China; (3) Modern Education Technology Center, The Central Institute for Correctional Police, Baoding 071000, China
Corresponding author:Teng, G.
      (tguifa@heinfo.net)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:326-330
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:Maturity of watermelons is hard to evaluate by non-destructive methods. In this paper, a watermelon maturity non-destructive detection method based on band magnitude vector (BMV) features of acoustic impulse response was introduced. BMV feature of audios was presented for melon mature detection. A simple acoustic collection platform was built for testing the correlation of BMV and ripeness stages, and it was compared with four acoustic features that already were used in watermelon non-destructive detection. Then, the influence of acoustic response and BMV feature was researched in different impacting strength. BMV features from two varieties of melons were detected for ripeness stages by PNN algorithm. Experimental results showed that the correlation of BMV and ripeness was the highest in all of the features, the influence of impacting strength was little for BMV, and the method had high accuracy for detecting maturity of two melon varieties.
Number of references:12
Main heading:Impulse response
Uncontrolled terms:Acoustic features - Acoustic impulse - Acoustic response - Band magnitude vectors - Nondestructive detection - Nondestructive methods - Watermelon maturity
Classification code:408.1 Structural Design, General
DOI:10.3969/j.issn.1002-6819.2010.08.055
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 48>

Accession number:20104313334606Title:Development of a twin-screw oil press with double-step multiple-stage squeezing chamber
Authors:Li, Shilong (1); Zhang, Yonglin (1); Liu, Xiefang (2)
Author affiliation:(1) School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China; (2) Wuhan New Concept Agriculture Machine Manufacture Co. Ltd, Wuhan 430030, China
Corresponding author:Li, S.
      (long6710@whpu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:102-107
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 new twin-screw press was developed for expressing oil from high oil content seeds or special oil seeds. Its squeezing chamber adopted double-step and multiple-stage form, in which two counter-rotating parallel screws were horizontally assembled, with one directly beneath another. The worms in the feed section took the form of partially meshing that means clearance existed between each meshing flights in the longitudinal direction but they overlapped in the transverse direction; in the ram section, non-intermeshing form was taken. Design of the main parameters of the twin-screw press was introduced. Its application effect in some oil mills was investigated which showed the practical production capacity was above 74% of the rated output, the oil recovery was above 92% and the oil-in-cake rate could be as low as 3.5%. So it could reduce 30%-40% of the energy consumption compared with a single-screw press. It is suitable for both hot and cold pressing.
Number of references:14
Main heading:Screws
Controlled terms:Design - Energy utilization - Hot pressing - Presses (machine tools)
Uncontrolled terms:Application effect - Cold pressing - Counter rotating - Double-step - Energy consumption - Feed sections - Longitudinal direction - Main parameters - Oil contents - Oil recoveries  - Oil seeds - Practical production - Presses - Screw press - Transverse directions
Classification code:408 Structural Design - 525.3 Energy Utilization - 603.1 Machine Tools, General - 605 Small Tools and Hardware - 812.1 Ceramics
DOI:10.3969/j.issn.1002-6819.2010.08.017
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 49>

Accession number:20104313334632Title:Evolution profiles of gases evolved during slow pyrolysis of elm sawdust
Authors:Deng, Chunjian (1); Liu, Ronghou (1)
Author affiliation:(1) Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (2) School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
Corresponding author:Liu, R.
      (liurhou@sjtu.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:260-264
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 grasp elm sawdust pyrolysis behavior, slow pyrolysis of elm sawdust at the heating rate 20&deg;C/min was studied in this paper by utilizing thermal analysis coupled with mass spectrometry technique. The evolution profiles of seven kinds of small-molecule gases including water vapor, methane, hydrogen, carbon monoxide, carbon dioxide etc. were discussed. Gases emission and mass loss occurred at the heating stage. Gases emission tended to take place under higher isothermal temperature. Results also showed that the emission peak of these gases was located at about 350&deg;C when the elm sawdust was heated to 380&deg;C and 480&deg;C and then was kept isothermal state 1.5 hours. Relative volume percentage of the gases was compared by calculating their peak area of mass spectrum. It was found that water vapor, carbon monoxide and carbon dioxide had a much higher amount of relative volume percentage. The water content was more than 50%. The relative volume percentage of hydrogen, methane, ethane and propene were rather small.
Number of references:15
Main heading:Gas fuel analysis
Controlled terms:Carbon dioxide - Carbon monoxide - Ethane - Gases - Heating - Hydrogen - Mass spectrometry - Methane - Propylene - Pyrolysis  - Thermoanalysis - Water content - Water vapor
Uncontrolled terms:Emission peaks - Heating stage - Isothermal temperature - Mass loss - Mass spectra - Peak area - Slow pyrolysis - Small molecules - Spectrometry technique - Thermal analysis  - Volume percentage
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 804 Chemical Products Generally - 802.2 Chemical Reactions - 801 Chemistry - 643.1 Space Heating - 641 Heat and Mass Transfer; Thermodynamics - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.044
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 50>

Accession number:20104313334608Title:Detection method on feed density for rice combine
Authors:Pan, Jing (1); Shao, Lushou (1); Wang, Ke (1)
Author affiliation:(1) Institute of Engineering, Anhui Agricultural University, Hefei 230036, China
Corresponding author:Shao, L.
      (shaolush@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:113-116
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 realize control of suitable feed quantity and decrease breakage and lose rate,feed density should be obtained firstly. According to RGB color image spectral analysis of rice, 2R+G color feature parameters were used as the feature of feed density of combine. Functional relationships between 2R+G color feature parameters and actual feed density was established. Results showed that fitting curves were obtained to the remarkable level by the differences of variety and growth period. Feed density of the correlation coefficient of all models was higher than 0.88. This method can provide references to the control of feed quantity.
Number of references:12
Main heading:Color
Controlled terms:Curve fitting - Densitometers - Density measurement (optical) - Density measurement (specific gravity) - Image processing - Imaging systems - Spectrum analysis - Spectrum analyzers
Uncontrolled terms:Color features - Color images - Correlation coefficient - Density Measurements - Detection methods - Fitting curves - Functional relationship - Growth period - Rice
Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.3 Optical Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 746 Imaging Techniques - 741.1 Light/Optics - 741 Light, Optics and Optical Devices - 921 Mathematics
DOI:10.3969/j.issn.1002-6819.2010.08.019
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 51>

Accession number:20104413336127Title:Effects of different irrigation methods on production of precision hill-direct-seeding super rice
Authors:Zheng, Tianxiang (1); Tang, Xiangru (1); Luo, Xiwen (2); Li, Guoxi (1); Wang, Zaiman (2); Shu, Shifu (1); Chen, Weitong (2)
Author affiliation:(1) College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (2) College of Engineering, South China Agricultural University, Guangzhou 510642, China; (3) Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Tang, X.
      (tangxr@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:8
Issue date:August 2010
Publication year:2010
Pages:52-55
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:The object of this study was to explore the total water requirement of precision hill-direct-seeding super rice daring the entire growth period and the effect of different irrigation amounts on the yield components of super rice, the field experiment was conducted to study the effect of different irrigation methods on the production of precision hill-direct-seeding super rice, Yuxiangyouzhan (super inbred rice) and Peizataifeng (super hybrid rice). The results showed that: although the water amounts of precision hill-direct-seeding sub irrigation less than that of Precision Hill-direct-seeding conventional irrigation by 23.51%, and less than that of transplanting conventional irrigation by 30.46%, there was no significant difference on their yield between precision hill-direct-seeding sub irrigation and precision hill-direct-seeding conventional irrigation, the theoretical yield of them was higher than transplanting conventional irrigation by 7.75% and 9.62% respectively, the real yield was higher than transplanting conventional irrigation by 9.18% and 8.09% respectively. The dry weight and leaf area index of precision hill-direct-seeding sub irrigation was higher than other treatments. These results showed that the sub irrigation was beneficial to high yield formation of precision hill-direct-seeding super rice.
Number of references:15
Main heading:Irrigation
Controlled terms:Seed - Water conservation
Uncontrolled terms:Direct-seeding - Dry weight - Leaf Area Index - Rice - Water saving irrigation - Yield
Classification code:444 Water Resources - 821.3 Agricultural Methods - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.08.008
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 52>

Accession number:20104313334621Title:Hyperspectral diagnosis of leaf N concentration of maize and variety difference
Authors:Zhou, Lili (1); Feng, Hanyu (1); Yan, Zhongmin (1); Liu, Ke (1); Zhou, Shunli (1)
Author affiliation:(1) Key Laboratory of Farming System, Ministry of Agriculture/College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Corresponding author:Zhou, S.
      (zhoushl@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:8
Issue date:August 2010
Publication year:2010
Pages:195-199
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 accurate, rapid and timely monitoring and diagnosis of maize nitrogen (N) nutrition is the base of the reasonable application of N fertilizer. By using the method of potted plant experiment to precisely control the supply of N, the sensitive spectral band and diagnosis model of three kinds of maize (hybrid) for leaf N concentration (LNC) monitoring and their variety difference were studied. The results show that: 1) There is variety difference in correlation between the LNC and the leaf spectrum reflectance within the range of 350-2500 nm, but it presents significant negative correlation at F=0.01 between 500-649 nm and 691-730 nm for all the three varieties (hybrid), and gets the highest correlation coefficient at the same wavelength. All of those show that an unified spectral band can be used to diagnose LNC in different varieties. 2) The quantitative equations of different varieties are established between maize LNC and normalized difference spectral index (NDSI) or ratio spectral index (RSI). The fitting degree is the best based on NDSI (714, 554) and RSI (714, 554) and is significantly at F=0.01 for the linear and exponential equations, so the derived regression models can be reliably used for estimating LNC in maize. 3) The deviation of estimation for maize LNC is the lowest when using the regression model derived from the same variety, but the deviation increases when using a model derived from multi-varieties or other variety. The maximum deviation of up or down estimation are 35.6% and 32.7%, respectively. The variety difference should be taken account, when using hyperspectral technique to diagnose the maize plant N status in researches and applications.
Number of references:17
Main heading:Estimation
Controlled terms:Concentration (process) - Nitrogen - Nitrogen fertilizers - Reflection - Regression analysis
Uncontrolled terms:Estimation models - Leaf nitrogen concentration - Maize - Spectral reflectances - Variety difference
Classification code:711 Electromagnetic Waves - 802.3 Chemical Operations - 804 Chemical Products Generally - 921 Mathematics - 922.2 Mathematical Statistics
DOI:10.3969/j.issn.1002-6819.2010.08.033
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 53>

Accession number:20104313334610Title:Design and experiment for flexible cutter of litchi denucleating machine
Authors:Cheng, Hongsheng (1); Li, Changyou (1); Bao, Yanhua (3); Zhang, Ye (1); Li, Xiaowen (1)
Author affiliation:(1) Key Laboratory of Key Technology on Agriculture Machine and Equipment, South China Agriculture University, Guangzhou 510642, China; (2) Chinese Academy of Agricultural Engineering, Beijing 100125, China; (3) Guangdong University of Business Studies, Guangzhou 510310, China
Corresponding author:Li, C.
      (Lichy@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:8
Issue date:August 2010
Publication year:2010
Pages:123-129
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:In view of the low denucleating rate and serious damage in existing litchi denucleating machine, a kind of four-blade nylon cutter was designed based on the analysis of litchi structure ,material characteristics and the stress state in denucleating process. Considered the evaluating parameters, such as denucleating success rate, pulp and syrup loss rate and stone breaking rate, orthogonal experiments were selected to test the machine. Results showed that, according to priority, the greatest three influencing factors order to denucleating effect were cutter inner diameter, feed depth and cutter shaft speed. The best test result was taken with cutter inner diameter at 10 mm, feed depth at 2 mm, and cutter shaft speed at 12 r/min. The cutter has strong adaptability, good effect and easy fabrication. This research has important meanings for the design of litchi denucleating machine.
Number of references:19
Main heading:Cutting
Controlled terms:Cutting equipment - Experiments - Machine design
Uncontrolled terms:Easy fabrication - Flexible cutters - Flexible strucure - Influencing factor - Inner diameters - Lichi - Loss rates - Material characteristics - Orthogonal experiment - Shaft speed  - Stress state - Test results
Classification code:601 Mechanical Design - 604.1 Metal Cutting - 901.3 Engineering Research
DOI:10.3969/j.issn.1002-6819.2010.08.021
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 54>

Accession number:20104313334641Title:Quality characteristics of rice grains with different kernel thickness and specific density
Authors:Li, Yinian (1); Wang, Jun (2)
Author affiliation:(1) School of Engineering, Nanjing Agricultural University, Nanjing 210031, China; (2) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
Corresponding author:Wang, J.
      (jwang@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:8
Issue date:August 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:In order to homogenize the quality characteristics of rice, rice grains were fractionated by kernel thickness and then separated by kernel specific density. Results indicated that if moisture content of rice was less than 20%, rice grains with different moisture content could not be fractionated by kernel thickness and separated by kernel specific density. Milling quality, physical and chemical properties and pasting characteristics of rice with greater kernel thickness and specific density were better than those of rice with less kernel thickness and specific density. The greater kernel specific density was, the lower broken rate was, and also the greater maximum three-point breaking force was. Rice grains are graded through kernel thickness fractionating and kernel specific density separating according to quality of rice grains and the quality of rice is also homogenized, so added value of rice with high quality is increased.
Number of references:21
Main heading:Grain (agricultural product)
Controlled terms:Chemical properties - Density (specific gravity) - Force measurement - Milling (machining) - Moisture - Moisture determination - Physical properties - Quality control
Uncontrolled terms:Breaking force - Grain - Milling physical properties - Pasting characteristics - Rice
Classification code:944.2 Moisture Measurements - 943.2 Mechanical Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 913.3 Quality Assurance and Control - 821.4 Agricultural Products - 801.4 Physical Chemistry - 801 Chemistry - 604.2 Machining Operations - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.3969/j.issn.1002-6819.2010.08.053
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 55>

Accession number:20104313334631Title:Effects of cooling, dehumidification and transpiration water recycling of closed micro-environment in greenhouse
Authors:Li, Xia (1); Xie, Yingge (2); Xue, Xuzhang (1); Wang, Guodong (2); Li, Shao (1); Zhang, Min (1); Chen, Fei (1)
Author affiliation:(1) National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China; (2) College of Science, Northwestern Agriculture and Forestry University, Yangling 712100, China; (3) Jiangsu Province Key Lab of Crop Genetics and Physiology, Yangzhou 225009, China
Corresponding author:Xue, X.
      (xuexz@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:8
Issue date:August 2010
Publication year:2010
Pages:254-259
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 study, temperature and humidity inside closed micro-environment were regulated through setting completely closed pot in greenhouse, dehumidifying, cooling air and recycling transpiration water within the closed pot based on energy exchange due to temperature disparity. The results showed that effects of dehumidifying and cooling were remarkable based on water-air temperature disparity. Compared to the closed check pot, the temperature of treated pot decreased by 3&deg;C and relative humidity decreased by 7% around 12:30. In other time, effect of dehumidifying and cooling was not so significant. However, temperature, relative humidity decreased on average by 2.4&deg;C and 5% in the daytime, respectively, with transpiration water gathered in a U-tube. Based on energy exchange due to soil-air temperature difference, air was pushed through soil using air pump to dehumidify, cool air and recycle transpiration water in the closed micro-environment. During the experiment, cooling effect was not significant at night, compared to the closed check pot, temperature and relative humidity decreased meanly by 2.5&deg;C and 10%, respectively, in the daytime. Around 12:30, dehumidifying and cooling were very significant; with temperature decreased 5&deg;C compared to the check pot, temperature difference inside and outside the micro-environment was only 1.5&deg;C, relative humidity reduced by 15%. Condensed water from cooling was pushed by high speed air flow to the pot. In general, cooling and dehumidifying can be realized through utilization of temperature difference between water-air and soil-air in the micro-environment and transpiration water could be recycled as well.
Number of references:10
Main heading:Water recycling
Controlled terms:Atmospheric humidity - Atmospheric temperature - Cooling - Greenhouses - Humidity control - Pumps - Soils - Transpiration - Wastewater reclamation
Uncontrolled terms:Air flow - Air pumps - Air temperature - Condensed water - Cool air - Cooling air - Cooling effects - Coverage - Energy exchanges - High speed  - Pot culture - Relative humidities - Temperature and relative humidity - Temperature differences
Classification code:643 Space Heating, Ventilation and Air Conditioning - 641.2 Heat Transfer - 618.2 Pumps - 483.1 Soils and Soil Mechanics - 452.4 Industrial Wastes Treatment and Disposal - 444 Water Resources - 443.1 Atmospheric Properties - 402.1 Industrial and Agricultural Buildings - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.08.043
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 56>

Accession number:20104313334647Title:Kinetics of colour changes of dehydrated spinaches during storage
Authors:Diao, Enjie (1); Li, Xiangyang (1); Ding, Xiaowen (2)
Author affiliation:(1) College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China; (2) College of Food Science, Southwest University, Beibei 400716, China
Corresponding author:Diao, E.
      (dej2008@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:8
Issue date:August 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 study the relationship between chlorophyll changes and visual green colour loss in dehydrated spinaches, fresh spinaches were freeze-dried and packed after being blanched. Chlorophyll and colour loss of dehydrated spinaches were investigated for deciding their kinetics during storage at 25, 35, 45 and 55&deg;C. The results showed that chlorophyll degradation and colour loss followed a first-order reaction. A significant relationship was found between the colour loss and chlorophyll destruction (R² &gt; 0.95, p &lt; 0.05) whether or not blanching prior to dehydration. The activation energies for chlorophyll degradation were determined as 39.99 kJ/mol and 41.44 kJ/mol for unblanched and blanched spinaches, respectively. For unblanched samples, the activation energies of colour loss determined on the basis of a^* and h values were 18.20 kJ/mol and 44.04 kJ/mol, while those for blanched samples determined as 18.93 kJ/mol and 48.08 kJ/mol, respectively. It was highly more susceptible to chlorophyll degradation for unblanched dehydrated spinaches than blanched ones, due to lower activation energy. Blanching prior to dehydration was favorable for extending the shelf life of dehydrated spinaches. The rate constants of chlorophyll degradation, a^* and h values of dehydrated spinaches were all increased with the rise of set storage temperature at the same pre-treated conditions. Storage at low temperature was good for extending the shelf life of dehydrated spinaches. The shelf life of dehydrated spinaches were 168 days (unblanched) or 465 days (blanched) during storage at 20&deg;C.
Number of references:23
Main heading:Activation energy
Controlled terms:Blanching - Chlorophyll - Color - Degradation - Dehydration - Dewatering - Porphyrins - Rate constants
Uncontrolled terms:Chlorophyll degradation - Colour change - Dehydrated spinach - First order reactions - Low temperatures - Shelf life - Storage - Storage temperatures
Classification code:741.1 Light/Optics - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 822.2 Food Processing Operations
DOI:10.3969/j.issn.1002-6819.2010.08.059
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 57>

Accession number:20104313334607Title:Design and analysis of an axial thrust balancing device for multistage centrifugal pumps
Authors:Ma, Xudan (1); Wu, Dazhuan (1); Wang, Leqin (1)
Author affiliation:(1) Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China
Corresponding author:Wu, D.
      (wudazhuan@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:8
Issue date:August 2010
Publication year:2010
Pages:108-112
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:Axial thrust balancing device is an important component for high-pressure multistage pump stable operations. In order to satisfy special reliability of structure and operation for high-pressure pumps used in reverse osmosis seawater desalination systems, a new kind of axial thrust balancing device was designed for multistage centrifugal pumps. Balancing device's inner flow field and its mechanism were researched based on computational fluid dynamics method. Different axial and radial clearances' performances as well as different length-diameter ratios were analyzed. The results indicate that inner flow field of sliding bearing clearance and support mechanism of bearing change greatly as inlet and outlet pressure conditions change; there is nonlinear relationship between balance force and axial and radial clearances, while there is linear relationship for length-diameter ratios and negative linear relation for relative leakages. A new device which axial clearance is 0.2 mm, radial clearance is 0.3 mm and length-diameter ratio is 1 is designed by above analyses. This optimized device can well balance the axial force and improve the reliability of multistage high-pressure centrifugal pumps obviously.
Number of references:15
Main heading:Pumps
Controlled terms:Bearings (machine parts) - Centrifugal pumps - Computational fluid dynamics - Desalination - Flow fields - Fluid dynamics - Fluids - Hydraulic machinery - Inlet flow - Pumping plants  - Seawater - Water filtration
Uncontrolled terms:Axial clearance - Axial forces - Axial thrust - Axial thrust balancing device - Balance forces - Computational fluid - Computational fluid dynamics methods - Design and analysis - High pressure pumps - High-pressure centrifugal pumps  - Inner flow field - Length-diameter ratios - Linear relation - Linear relationships - Multi-stage - Multistage centrifugal pumps - Multistage pumps - New devices - Non-linear relationships - Optimized devices  - Outlet pressures - Radial clearance - Seawater desalination systems - Sliding bearing - Stable operation - Support mechanism
Classification code:632.2 Hydraulic Equipment and Machinery - 631 Fluid Flow - 618.2 Pumps - 601.2 Machine Components - 471.4 Seawater, Tides and Waves - 446 Waterworks - 445.1 Water Treatment Techniques
DOI:10.3969/j.issn.1002-6819.2010.08.018
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 58>

Accession number:20104313334604Title:Melting of seasonal snow cover and its influence on soil temperature conditions of shallow layer
Authors:Zhang, Xiaolei (1); Zhou, Zhimin (2); Liu, Jiliang (1)
Author affiliation:(1) State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; (2) College of Environment and Planning, Hennan University, Kaifeng 475001, China
Corresponding author:Zhang, X.
      (skyxlzhang@126.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:91-95
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 order to clarify the melting of seasonal snow cover and its influence on shallow layer soil temperature conditions, the authors studied the process of seasonal snow cover melting, and its influence on temperature conditions of 0, 5, 10, 20, 30 and 50 cm soil layers based on the data from the field test in the northeast of China. Main findings of authors' study were as follows: The rate of seasonal snow cover melting was closely related to temperature changes, but there was no significant difference of daily snow cover melting among different snow covers; The soil temperature amplitude at snow covered area was significantly less than that at the area without snow, and the time both of soil temperature respond to air temperature and the thawing delayed with the increasing of snow depth; The energy exchange between soil and atmosphere had been cut off due to the seasonal snow cover, this caused the depth which was directly influenced by air temperature reduced, and in this project, 49 cm-depth snow covered area reduced 10 cm, but 80 cm-depth snow covered area reduced 25 cm, thus indicated that the influence of seasonal snow cover on soil temperature had an enhancive effect along with the snow deposit; When the snow cover melting finished, soil temperature conditions restored gradually to the level where it had not been covered by snow, and the more shallow of soil depth, the faster it restored. The results provide a further understand of the study of the water-heat exchange, and also have some useful value of research on consideration of problems related to agrology, agricultural irrigation, and so on.
Number of references:19
Main heading:Atmospheric temperature
Controlled terms:Heat transfer - Melting - Restoration - Snow - Soils
Uncontrolled terms:Agricultural irrigation - Air temperature - Cut-off - Energy exchanges - Field test - Heat exchange - Seasonal snow cover - Shallow layers - Snow covered area - Snow covers  - Snow deposit - Snow depths - Soil depth - Soil layer - Soil temperature - Temperature changes - Temperature conditions
Classification code:641.2 Heat Transfer - 531.1 Metallurgy - 483.1 Soils and Soil Mechanics - 443.3 Precipitation - 443.1 Atmospheric Properties - 409 Civil Engineering, General - 402 Buildings and Towers
DOI:10.3969/j.issn.1002-6819.2010.08.015
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 59>

Accession number:20104313334634Title:Effects of bamboo vinegar and bacterial reagent addition on physico-chemical properties of green wastes compost
Authors:Tian, Yun (1); Wang, Haiyan (1); Sun, Xiangyang (1); Yu, Zhou (2); Cao, Jixin (1); Zhang, Lu (1); Zhao, Kun (1)
Author affiliation:(1) Key Laboratory of Soil and Water Conservation and Desertification Combation, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; (2) Beijing Jing Pu Yuan Biological Engineering Co., Ltd, Beijing 100081, China
Corresponding author:Sun, X.
      (sunxy@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:8
Issue date:August 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:In order to investigate the effects of different concentrations of bamboo vinegar and bacterial reagent addition on physico-chemical properties of green waste compost, a static aerobic high temperature compost test with an orthogonal experimental design L<inf>9</inf>(3⁴) was conducted. The variation trends in temperature, pH, EC, total N, P and K concentrations during composting were analyzed, and total N, P, K, Mg, Fe, S concentrations of the compost products in each treatment were compared with analysis of variance (ANOVA) and multiple comparison test. The results showed that the addition of bamboo vinegar and bacterial reagent made the initial temperature rise quickly, reduce pH value and EC value of composting products effectively. The bamboo vinegar and bacterial reagent had very significant effects on total N, P, K, Fe and S concentrations (p &lt; 0.01), which made the total P, K, Fe and S concentrations increase effectively. Furthermore, there existed interaction between bamboo vinegar and bacterial reagent. The total N increase less because of ammonia volatilization, Compared with the control, the addition of bacterial reagent accelerated the N loss, but the addition of a certain concentration of bamboo vinegar can keep more N. The combination of 1:1000 (v:v) bamboo vinegar of 2 L and bacteria reagent of organic waste of 0.5% has the best effect on green wastes compost.
Number of references:18
Main heading:Waste treatment
Controlled terms:Acetic acid - Bacteriology - Bamboo - Chemical properties - Composting - Concentration (process) - Refuse disposal - Regression analysis - Sewage
Uncontrolled terms:Ammonia volatilization - Bacterial reagent - Compost products - Green waste compost - Green wastes - High temperature - Multiple comparison test - Organic wastes - Orthogonal experimental design - pH value  - Physicochemical property - Temperature rise
Classification code:821.4 Agricultural Products - 804.1 Organic Compounds - 802.3 Chemical Operations - 922.2 Mathematical Statistics - 801.2 Biochemistry - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 423 Non Mechanical Properties and Tests of Building Materials - 801 Chemistry
DOI:10.3969/j.issn.1002-6819.2010.08.046
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 60>

Accession number:20104313334638Title:Calculation of land consolidation potential and optimization of rural residential areas based on households' willingness
Authors:Kong, Xuesong (1); Liu, Yanfang (1); Zou, Yafeng (1); Chen, Yiyun (1)
Author affiliation:(1) School of Resource and Environment Science, Wuhan University, Wuhan 430079, China; (2) Key Laboratory of Geographic Information System, Wuhan University, Wuhan 430079, China
Corresponding author:Liu, Y.
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 2010
Publication year:2010
Pages:296-301
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:Evaluation of land consolidation potential and distribution optimization of rural residential areas are the primary fields in rural residential area study. As a case of Jiayu County, Hubei Province, an evaluation model of land consolidation potential was established based on three factors of policy index, households' willingness and spatial distribution, the realistic potential of land consolidation of rural residential areas in Jiayu County was analyzed. By spatial analysis of GIS, central villages, communications, slopes and land use types were analyzed in the quantitative optimization of spatial distribution. The results showed that the realistic potential of land consolidation in rural residential areas of Jiayu County was 326.35 hm² from 2007 to 2020, consolidation areas and planning areas were well realized spatial optimization with the assistant decision of spatial analysis, land use efficiency and intensive degree of rural residential areas in Jiayu County were improved obviously, which can offer an academic basis for the rural residential land consolidation in practice.
Number of references:17
Main heading:Optimization
Controlled terms:Land use - Rural areas - Size distribution
Uncontrolled terms:Assistant decision - Distribution optimization - Evaluation models - Households' willingness - Hubei Province - Jiayu County - Land consolidations - Land use efficiency - Land use type - Policy index  - Realistic potentials - Rural residential areas - Spatial analysis - Spatial distribution - Spatial optimization
Classification code:403 Urban and Regional Planning and Development - 423 Non Mechanical Properties and Tests of Building Materials - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.5 Optimization Techniques
DOI:10.3969/j.issn.1002-6819.2010.08.050
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 61>

Accession number:20104313334633Title:Influence factors of phosphorus recovery from biogas fermentative liquid
Authors:Li, Liang (1); Wang, Dehan (1); Zou, Xuan (1); Xie, Xilong (1); Zeng, Ting (1); Li, Dan (1)
Author affiliation:(1) Department of Environmental Science and Engineering, College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Wang, D.
      (dehanwang@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:8
Issue date:August 2010
Publication year:2010
Pages:265-271
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:Taking the biogas fermentative liquid treated by anaerobic digestion process from livestock wastewater as the research object, the effects of organic compounds, suspended solid (SS), carbonate, and initial phosphate loads on the phosphorus recovery were investigated in different pH conditions by using two treatment methods: Batch-Influent and Continuous-Influent, using sodium hydroxide solution to lifting pH values in the Batch-Influent, while using aeration stripping from the bottom to lifting pH values in the Continuous-Influent. The results showed that the pH must be controlled higher than 8.5 to reduce the influence of organic compounds in Continuous-Influent. When pH value were higher than 8.0 and the concentration of SS were higher than 400 mg/L, the recovery rate of phosphorus Vp(t) decreased with the rise of concentration of SS while when pH value was 8.5 or 9.0, Vp(t) decreased to some extent; On the other hand, when pH value was 9.5, Vp(t) kept invariant about 73%. When the concentration of carbonate reached 2 mmol/L and pH value was 9.0, Vp(t) decreased by 11% yet, Vp(t) decreased by 7.8% when the concentration of carbonate reached 2mmol/L and pH value was 9.5. There was a little influence when pH value was 8.5. Vp(t) of the fermentative liquid whose initial phosphate loads were 50 mg/L were highest at any pH conditions or after 8 hours aerated. Compared with Batch-Influent, the influence of the four factors on the phosphorus recovery was less than Continuous-Influent.
Number of references:25
Main heading:pH effects
Controlled terms:Agriculture - Anaerobic digestion - Biogas - Carbonation - Concentration (process) - Liquids - Organic compounds - Phosphorus - Recovery - Sodium  - Wastewater - Wastewater treatment
Uncontrolled terms:Anaerobic digestion process - Fermentative liquid - Influence factors - Livestock wastewater - pH condition - pH value - Phosphate loads - Phosphorus recovery - Recovery rate - Research object  - Sodium hydroxide solutions - Suspended solids - Treatment methods
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 802.2 Chemical Reactions - 931.2 Physical Properties of Gases, Liquids and Solids - 801.1 Chemistry, General - 531 Metallurgy and Metallography - 522 Gas Fuels - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes - 549.1 Alkali Metals
DOI:10.3969/j.issn.1002-6819.2010.08.045
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 62>

Accession number:20104313334620Title:Improved harvesting method for corn LAI measurement in corn whole growth stages
Authors:Yao, Yanjuan (1); Fan, Wenjie (1); Liu, Qiang (2); Li, Li (2); Tao, Xin (1); Xin, Xiaozhou (2); Liu, Qinhuo (2)
Author affiliation:(1) Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China; (2) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China; (3) Satellite Environment Center, Ministry of Environmental Protection, Beijing 100029, China
Corresponding author:Yao, Y.
      (yjyao2008@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:8
Issue date:August 2010
Publication year:2010
Pages:189-194
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:Considering different canopy structures for the whole crop growth stages, it is not suitable to use traditional instrument to measure crop LAI for some growth stages, such as crop early growth stages with very sparse canopy structure. In order to obtain comparable and coherent LAI, the authors proposed the new method for corn LAI measurement, namely improved harvesting method (IHM). The IHM can reduce the measurement workload and the corn damage. Through the single corn total area comparison based on the two computing methods, namely the regression method and the shape factor method, it is shown that the regression method is better than shape factor method. Furthermore, based on the analysis of the ratio of stalk area to total area for the whole growth stages, the authors draw the conclusion that the stalk area must be considered for accurate LAI measurement. This work can provide some references for similar research and can accumulate the priori knowledge. The research of this paper will improve the study of LAI inversion and validation for remote sensing data.
Number of references:15
Main heading:Crops
Controlled terms:Remote sensing
Uncontrolled terms:Canopy structure - Computing methods - Corn - Crop growth - Early growth - Growth stages - Leaf area index - Measurement method - Priori knowledge - Regression method  - Remote sensing data - Shape factor
Classification code:731.1 Control Systems - 821.4 Agricultural Products
DOI:10.3969/j.issn.1002-6819.2010.08.032
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 63>

Accession number:20104313334640Title:Provincial scale spatial variation of cultivated land production capacity and its impact factors
Authors:Zhang, Hongfu (1); Zhou, Shenglu (1); Wu, Shaohua (1); Li, Zhi (1); Hua, Sheng (2); Li, Li (2)
Author affiliation:(1) The School of Geography and Ocean Science, Nanjing University, Nanjing 210093, China; (2) Jiangsu Centre of Real Estate Development, Nanjing 210024, China
Corresponding author:Zhou, S.
      (zhousl@nju.edu.cn)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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:Account of agricultural production capacity is the deepening and extension of cultivated land classification and gradation, which is very important for the implementation of the strategic objectives of cultivated land protection. On the basis of cultivated land classification and gradation results, through investigating supplementary sampling points, this paper carries out the accounting of agricultural production capacity in Jiangsu Province, and analyzes its spatial pattern and variation under the province-scale, and explores its impact factors. The results showed that the spatial variation law of agricultural production capacity at different levels could be basically same. The size of production capacity showed the features of northern part &gt; middle part &gt; southern part in Jiangsu Province, which was mainly affected by the distribution pattern of arable land area, therefore, cultivated land area was an important guarantee of food security, and the rational development of cultivated land reserve resources was an important way to increase cultivated land production capacity in the future. From the distribution law of cultivated land yield per unit, it showed that the spatial distribution of the theoretical yield per unit could be the same as the realizable yield per unit. It was larger in the northern and southern part than in middle part. The spatial distribution of the actual yield per unit was more complicated, which was showing a distribution of the characteristics of island, and island of the most high-value areas was in the Lixiahe Plain District; organic matter, agricultural irrigation and drainage conditions and the utilization factor were province-scale leading factors affecting the yield of cultivated land. The difference of the impact factors of cultivated land production capacity in all districts was obvious. By taking correct measures, the status of the production capacity can be completely control of Jiangsu Province, and the basis for macro-controlling and adjusting the regional land resources can be provide. Meanwhile, according to different indicators of the dominant impact factors in different districts, cultivated land production capacity can be increased in the future.
Number of references:14
Main heading:Landforms
Controlled terms:Agriculture - Food supply - Indexing (of information) - Land use - Planning - Regional planning - Size distribution - Volume control (spatial)
Uncontrolled terms:Agricultural irrigation - Agricultural productions - Arable land - Cultivated lands - Distribution law - Distribution patterns - Drainage condition - Food security - Impact factor - Jiangsu province  - Land resources - Organic matter - Per unit - Production capacity - Sampling points - Spatial distribution - Spatial patterns - Spatial variables - Spatial variations - Strategic objectives  - Theoretical yield - Utilization factor
Classification code:821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.3 Specific Variables Control - 481.1 Geology - 903.1 Information Sources and Analysis - 423 Non Mechanical Properties and Tests of Building Materials - 403.2 Regional Planning and Development - 403 Urban and Regional Planning and Development - 404.2 Civil Defense
DOI:10.3969/j.issn.1002-6819.2010.08.052
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.

<RECORD 64>

Accession number:20104313334599Title:Effects of subirrigation quota on cucumber yield and water use efficiency in greenhouse
Authors:Song, Wen (1); Zhang, Yulong (1); Han, Wei (1); An, Ning (1); Wei, Wei (1); Chen, Fuqiang (1)
Author affiliation:(1) College of Land and Environment, Shenyang Agricultural University, Shenyang 110161, China
Corresponding author:Zhang, Y.
      (ylzsau@163.com)
   
Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
Abbreviated source title:Nongye Gongcheng Xuebao
Volume:26
Issue:8
Issue date:August 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 optimal irrigation quota of sectional subirrigation for cucumber in protected field was studied by measuring the yield and water use efficiency under different soil wetted ratios. The cucumber growth period was divided into two stages as earlier stage and later stage, and the irrigation was based on the upper irrigation control limit and lower control limit for each growth period. The results are showed as fellows: when the buried depth of subirrigation pipe is 25 cm, the planned wetting soil zone is 15-40 cm (25 cm depth), the upper irrigation control limit and lower control limit are 6 kPa (soil water suction) and 30 kPa, respectively, the optimal soil wetted ratio of planned wetting soil zone for earlier stage of cucumber is 0.37-0.38 (irrigation quota is 54-56 m³/hm²) and later stage is 0.34-0.37 (irrigation quota is 50-55 m³/hm²) for sandy clay loam, and at these wetted ratios the yield and water use efficiency are optimal.
Number of references:16
Main heading:Subirrigation
Controlled terms:Greenhouses - Optimization - Soil moisture - Underwater soils - Water conservation - Water supply - Wetting
Uncontrolled terms:Buried depth - Control limits - Cucumber - Growth period - Irrigation quotas - Lower control limit - Sandy clay loam - Soil water - Two stage - Water use efficiency  - Wetted percentage
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 821.6 Farm Buildings and Other Structures - 821.3 Agricultural Methods - 483.1 Soils and Soil Mechanics - 446.1 Water Supply Systems - 444 Water Resources
DOI:10.3969/j.issn.1002-6819.2010.08.010
Database:Compendex
Compilation and indexing terms, Copyright 2010 Elsevier Inc.