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通过分析陇东塬区冬小麦越冬期土壤水分损耗,以及决定越冬土壤水分损耗的关键气象要素,指出在秋季降水充沛、土壤收墒充足、冬季气温偏高、降水明显偏少的年型,越冬期土壤水分损耗是不可忽视的,其中有一半年份,越冬期土壤水分损耗占冬小麦生长季节自然降水的10%～22%。尤其是入冬前土壤含水量充沛,而返青以后生长期降水相对较少的年份,越冬期麦田土壤水分损耗相当于返青到成熟期降水量的44%。
By analyzing the loss of winter wheat during the winter and the key meteorological elements which determine the winter soil moisture loss, it is pointed out that the annual precipitation is abundant in autumn, adequate in soil moisture, high in winter temperature and obviously less precipitation, Soil moisture loss can not be ignored, of which half of the year, overwintering soil moisture losses accounted for 10% to 22% of the natural winter wheat growing season. Especially in the year before winter soil moisture content is abundant, but after returning to green, relatively less precipitation in the growing season, overwintering wheat field soil moisture loss equivalent to the return green to mature 44% of the precipitation.