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用联合国粮农组织（ＦＡＯ）最新推荐的彭曼－蒙蒂斯模式（ＦＡＯ－ＰＭ）计算甘肃河东１０个代表站点的冬、春小麦的需水量。并据此分析了该地区冬、春小麦的需水规律及分布特征：在甘肃河东雨养农业区，冬小麦全生育期平均需水量为３５２．２ｍｍ；春小麦为３２４．８ｍｍ，需水量均明显高于同期降水量；无论冬、春小麦，在其整个生育时段中，最大需水量均在开花－乳熟时段，日平均需水量达５ｍｍ左右；日平均需水量的分布基本呈由北向南递减的纬向变化
The winter and spring wheat water requirements of 10 representative sites in Hedong, Gansu were calculated using the latest recommended Penman-Montis model (FAO-PM) of the UN Food and Agriculture Organization (FAO). According to the analysis, the water requirement and distribution characteristics of winter wheat and spring wheat in this area are as follows: In Gansu rainfed farming area, the average water requirement of winter wheat is 352.2mm during the whole growth period; 324.8mm for spring wheat, In winter and spring wheat, the maximum water requirement was in the flowering-milk ripening period, and the daily average water requirement was about 5 mm. The distribution of daily average water requirement was basically in the zonal direction decreasing from north to south Variety