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当前由于农业灌水资源日趋短缺,对水利土壤改良系统中的土壤改良方法提出了更高的要求,对于作为开垦盐渍土不可缺少的冲洗措施同样也是如此。然而在现有确定冲洗定额的公式中均未考虑所采用的灌水方法对土壤排盐的影响,众所确认的公式多由两个项目组成;原始的与允许的土壤含盐量之比的对数、田间最大持水量或饱和含水量,以及某一个排盐系数,在考虑到土壤盐分组成和机械组成变化的情况,这个系数预示冲洗定额的大小。而一些研究工作已经表明,当改变供水方法时,同样数量的水可以达到不同程度的土壤脱盐。本文介绍在冲洗过程中不同灌水间隔时间和灌水定额对土壤排盐影响的试验研究结
At present, due to the shortage of irrigation resources in agriculture, higher requirements are put forward for soil improvement methods in soil improvement systems of water conservancy, and the same is true for flushing measures that are indispensable for reclaiming saline soil. However, none of the existing formulas for determining the flushing quota have taken into account the effect of the adopted irrigation methods on soil salt rejection. Most of the validated formulas are composed of two items; the ratio of the original to the permitted soil salt content The maximum water holding capacity or saturated water content in the field, as well as a certain salinity factor, predicts the size of the rinse ration taking into account changes in soil salinity composition and mechanical composition. Some research work has shown that when the water supply method is changed, the same amount of water can reach different degrees of soil desalination. This paper presents the experimental study on the effect of different irrigation interval and irrigation quota on soil salt rejection during flushing