对于干旱的论述和研究,一般多采用干燥度或降水量,也有的采用农田水分平衡.上述方法在做大范围的宏观分析时,有其可取之处,但却忽视了作物需水的直接来源是土壤水分.而不同质地的土壤,其贮水能力及对作物的供水能力和调节作用是不相同的,因此很难确切地反映土壤水分贮量与作物需水之间的供需关系.本文针对我省晋西地区的农田水分条件,从估算农田的可能蒸散量、实际蒸散量和农田土壤水分盈亏量入手,对该地区的农田 For the discussion and study of drought, the dryness or precipitation is generally used more, and the farmland water balance is also used.The above method has its merits in a large-scale macro analysis but neglects the direct source of crop water demand Is different from the soil texture, its storage capacity and water supply capacity and regulation of crops are not the same, it is difficult to accurately reflect the relationship between soil water storage and crop water supply and demand.This paper The water conditions of farmland in Jinxi area in our province begin with the estimation of the potential evapotranspiration, actual evapotranspiration and farmland soil moisture profit and loss,