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根据三年定位实测资料，阐述0～100cm土层贮水量的动态变化，分析土壤贮水增减与降雨、蒸发的关系．观测结果表明，在气候正常年，雨季土壤贮水为增量，旱季土壤贮水为减量，但在坡地不同坡段和梯地不同梯级，土壤贮水增减有差异。在旱月土壤贮水减至最低，仅相当子田间持水量的55％～80％．因此在土壤水分管理上．应当密切注意土壤贮水减量最大的时期，以采取有效措施减少土壤水分蒸发，提高土壤水分利用率。
According to the measured data of three years’ positioning, the dynamic changes of water storage in 0 ~ 100cm soil layer are expounded, and the relationship between the increase and decrease of soil water storage and rainfall and evaporation is analyzed. The results show that in normal years, the storage of soil water in the rainy season is increased, and the water storage in the dry season is reduced. However, there is a difference in the storage and storage of water in different slope stages and steps in the slope. Soil moisture in dry months to a minimum, only a considerable field of 55% water capacity of 80%. Therefore in soil moisture management. Should pay close attention to the maximum amount of soil water storage reduction period, in order to take effective measures to reduce soil water evaporation and improve soil water use efficiency.