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利用遮雨棚研究了控灌对土壤含水量的影响。结果表明，灌水量越少，土壤各土层含水量越低，土层间含水量差异越大。灌水量越大，各层土壤含水量提高，并随土层深度增加，土层间含水量差异减少。只浇拔节水的处理，收获时０～０．６０ｍ土层的土壤含水量接近有效水低限值。本试验条件下冬小麦能有效地利用１．８０ｍ以上的土壤水分。
The effect of irrigation control on soil water content was studied by shelter. The results showed that the less water content, the lower the soil moisture content of soil layers, the greater the difference between soil moisture content. The greater the amount of irrigation, the soil moisture content of each layer increased, and with the depth of soil depth, soil water content decreased. Only pouring and water-saving treatment, harvest 0 ~ 0.60m soil moisture content close to the effective water low limit. Under the experimental conditions, winter wheat can effectively utilize soil moisture above 1.80m.