The principle of measuring turbulent flux by eddy covariance system and its application to field evapotranspiration measurement were introduced in this paper.
主要介绍涡度相关技术测定湍流通量的原理，及其在农田蒸散量测定方面的国内外应用研究进展。
The amount of evapotranspiration of surface irrigation field was a little larger than that of sprinkler irrigation field.
喷灌农田的作物蒸散量通常小于地面灌农田。
Analysis of the effects of soil, plant and atmospheric factors on the calculation of evapotranspiration is made on the basis of field experimental data.
本文从田间实验资料入手，逐一分析了土壤、植物、大气因子对蒸散计算的影响。
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