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根据1992～1995连续4年的夏玉米农田土壤水分动态、水分平衡试验，研究了豫西旱地夏玉米田水分动态规律、需水规律及水分盈亏状况。结果表明：本区夏玉米田多年水分变化有4个阶段；夏玉米的需水量为369mm，4年试验水分满足率平均83．4呢，常年（30年资料）水分满足率为99．4%，个另11年份及生育阶段水分亏缺严重，在豫西是否种植应根据降水年型，特别是根据当年的底墒情况及夏玉米生育期间降水预测量来决定。
According to the soil moisture dynamic and water balance test of summer maize farmland from 1992 to 1995, the dynamic law of moisture, water requirement and water profit and loss of summer maize field in the west of Henan province were studied. The results showed that there were four stages of moisture change in summer maize field in this area; the water requirement of summer maize was 369 mm, the average water satisfaction rate of 4 years was 83.4, and the annual (30 years) water satisfaction rate was 99.4% , Another 11 years and the stage of child-bearing water deficit serious, whether planting in western Henan should be based on precipitation type, especially according to the current year’s moisture content and rainfall forecast during summer maize to decide.