Research of Evapotranspiration and Evaporation for Winter Wheat
Abstract：With the data of the Large weighing lysimeter and Micro-lysimeter between the year 2010 to 2011, this article study the variation of the winter wheat evapotranspiration and evaporation. The results show that the total evapotranspiration of winter wheat in 2010-2011 is 360. 974 mm. The evapotranspiration reached maximum 84. 706 mm in heading-filling stage. Chart of the average daily evapotranspiration of winter wheat in terms of growing periods which exerts the feature with two summits in sowing-tillering and heading-filling stage. The evaporation of winter wheat amounted to 115. 808 mm, which accounted to 32.8% in total evapotranspiration, so about 1/3 of the total winter wheat consumptive use lost in the form of evaporation throughout the growing season. Daily average soil evaporation was the highest at sowing to til of ering stage compared to other time. Diurnal variation of soil evaporation was similar to diurnal variation field evapotranspiration, and the peak occurred at between 12.00 and 14.00.
Keywords：large weighing lysimetermicro-lysimeterevapotranspirationtranspirationevaporation
Publication Date：2011-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)