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强小嫚,蔡焕杰,王 健.波文比仪与蒸渗仪测定作物蒸发蒸腾量对比[J].农业工程学报,2009,25(2):12-17.DOI:
波文比仪与蒸渗仪测定作物蒸发蒸腾量对比
投稿时间:2007-08-19  修订日期:2009-01-20
中文关键词:  蒸发蒸腾量,作物,大型称重式蒸渗仪,波文比-能量平衡法
基金项目:教育部高校青年教师奖资助项目
作者单位
强小嫚 1.西北农林科技大学旱区农业水土工程教育部重点实验室杨凌 7121002.中国农业科学院农田灌溉研究所新乡 453003 
蔡焕杰 1. 西北农林科技大学旱区农业水土工程教育部重点实验室杨凌 712100 
王 健 1. 西北农林科技大学旱区农业水土工程教育部重点实验室杨凌 712100 
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中文摘要:为了更准确地估算作物蒸发蒸腾量,该文结合波文比仪和大型称重式蒸渗仪,对波文比-能量平衡法估算的冬小麦蒸发蒸腾量(ETb)和蒸渗仪实测的冬小麦蒸发蒸腾量(ETl)进行了分析研究。结果表明,波文比计算值(ETb)和蒸渗仪实测值(ETl)的变化趋势基本一致,相关性比较好。波文比计算值(ETb)和蒸渗仪实测值(ETl)的日变化曲线都呈单峰型,早晚小,中午大,夜间多为负值,波文比计算值的日变化比较稳定,蒸渗仪实测值的日变化比较敏感。风速较大时,蒸渗仪实测值日变化随风速的增大而减小的趋势比较明显,波文比计算值日变化受大的风速影响较小;风速较小时,波文比计算值和蒸渗仪实测值的日变化与风速呈很弱的负相关关系。波文比计算值日变化和太阳净辐射日变化的关系比较密切,蒸渗仪实测值日变化和太阳净辐射日变化的关系不是很明显。波文比计算值更能稳定地反映出冬小麦蒸发蒸腾量的日变化规律。
Qiang Xiaoman,Cai Huanjie,Wang Jian.Comparative study of crop evapotranspiration measured by Bowen ratio and lysimeter[J].Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2009,25(2):12-17.DOI:
Comparative study of crop evapotranspiration measured by Bowen ratio and lysimeter
Author NameAffiliation
Qiang Xiaoman 1. Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China
2. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, China 
Cai Huanjie 1. Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China 
Wang Jian 1. Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest Agriculture and Forestry University, Yangling 712100, China 
Key words:evapotranspiration, crops, large scale lysimeters, Bowen ratio-energy balance
Abstract:Crop evapotranspiration provides scientific basis for rational irrigation and water resources allocation. In order to estimate the crop evapotranspiration accurately, two evapotranspiration variables of winter wheat were analyzed. One was estimated by Bowen ratio-energy balance equation (ETb), the other was measured by lysimeter (ETl). The results indicated that the variations of ETb were almost the same as those of ETl. Variations of ETb and ETl were single peak curves. Their values were bigger at noon, and smaller in the morning and evening, and negative at night. The diurnal variation of ETb was smaller than that of ETl. Their diurnal variations were weakly negatively correlated with wind speed if the wind speed was small, but if the wind speed was big, the trend that ETl decreases with the increase of wind speed was obvious. The ETb was highly related to net solar radiation, while ETl was not obviously related to net solar radiation. Crop evapotranspiration estimated by Bowen ratio represents the diurnal variation more steadily.
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