【摘要】 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。更多还原

【Abstract】 By analyzing the experiment data of spring wheat in 2002 to 2003, it is showed that the evpotranspiration in whole growing period of spring wheat in Xinjiang is ranged form 410 mm to 430 mm, both the amount and intensity of evapotranspiration is the highest during heading to milk ripening stage. About 38.3%~42.0% of evapotranspiration is consumed by soil evaporation. There is a close relation between leaf area index and evpotranspiration intensity, which can be expressed by compound curve equation. The daily evapotranspiration of spring wheat field is simulated by using Penman-Monteith formula cooperated with crop coefficient and crop water stress index. The result indicates that this method is ideal in precision.更多还原