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通过对2002～2003年北疆春小麦田试验数据的分析结果表明,北疆春小麦全生育期蒸散量在410～430mm左右,蒸散强度为4.11～4.14mm,蒸散量和蒸散强度均在抽穗～乳熟期达到最大,平均棵间蒸发占总蒸散量的比例为38.3%～42.0%。叶面积指数与蒸散强度关系极为密切,可用复合曲线方程来描述二者的关系。通过采用Penman-Montieth模式配合单值平均作物系数和水分胁迫系数估算农田蒸散量的方法,对当地春小麦田的日蒸散量进行估算,精确度检验结果表明该方法是切实可行的。
The results of spring wheat field experiment in northern Xinjiang from 2002 to 2003 showed that the evapotranspiration of spring wheat was about 410-430 mm and the evapotranspiration was 4.11-4.14 mm in spring and the evapotranspiration and evapotranspiration were all in heading ~ The maximum percentage of evapotranspiration was 38.3% -42.0% of the total evapotranspiration. The relationship between leaf area index and evapotranspiration is very close. The compound curve equation can be used to describe the relationship between them. The daily evapotranspiration (Evapotranspiration) in the spring wheat field was estimated by Penman-Montieth model with the single-crop average crop coefficient and water stress coefficient to estimate the evapotranspiration. The accuracy test results show that this method is feasible.