Comparison of Calculations for Crop Transpiration

机译：作物蒸腾量计算的比较

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It is significant to research crop evapotranspiration, including plant transpiration and soil evaporation, for field water cycle. There are some techniques to obtain transpiration index. In this paper, comparisons of three techniques for calculating evapotranspiration of grape under alternate partial root zone drip irrigation were curried. The results showed that cumulative transpiration can be calculated by sap flow and Penman-Monteith. Compare to water balance, the relative error was not beyond 10%. Considered the relationship of delay lag between the variety of sap flow of grape vine and the change of the transpiration, the modified coefficient K related with (Rn — G) was introduced. The results showed'there was a ' good correlation between the modified temporal sap flow and the transpiration rate. The correlation coefficient is 0.8344, and the slop of correlation equation is 0.9038.

机译：对于田间水循环，研究作物的蒸散量，包括植物的蒸腾作用和土壤蒸发，具有重要意义。有一些获取蒸腾指数的技术。本文对三种不同根系滴灌条件下计算葡萄蒸散量的三种技术进行了比较。结果表明，可以通过树液流量和Penman-Monteith来计算累积蒸腾量。与水平衡相比，相对误差不超过10％。考虑到葡萄树汁液流的变化与蒸腾量变化之间的延迟滞后关系，引入与（Rn_G）有关的修正系数K。结果表明，改良的临时树液流量与蒸腾速率之间存在良好的相关性。相关系数为0.8344，相关方程的斜率为0.9038。

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来源
《2011 International Conference on New Technology of Agricultural Engineering》|2011年|367-371|共5页
会议地点 Zibo(CN)
作者
Zhou Qing-yun; Wang Yang-ren; Sun Shu-hong;
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作者单位

Hydraulic Engineering Department,Tianjin agricultural university,Tianjin, China, 300384;

Hydraulic Engineering Department,Tianjin agricultural university,Tianjin, China, 300384;

Hydraulic Engineering Department,Tianjin agricultural university,Tianjin, China, 300384;

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原文格式 PDF
正文语种 eng
中图分类农业工程;
关键词
transpiration; water balance; Penman-Monteith; sap flow;

机译：蒸腾作用水平衡Penman-Monteith；液流;

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Comparison of Calculations for Crop Transpiration

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