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宁夏南部气候干旱,淡水十分缺乏,但苦水资源尚丰,为了提高农业生产,势必发展苦水灌溉。该区为底层盐化灰钙土,苦水灌后大量盐分积累在上层土壤中,导致表土很快发生次生盐渍化,影响农业生产的进一步发展。土壤盐分随水分而运动,两者在行迹上是密切一致的。土壤的积盐和脱盐,就是土壤水分随着灌水及气候季节变化而运动的结果。因
In the southern part of Ningxia, due to the arid climate and the lack of fresh water, the resources of bitter water are still abundant. In order to improve agricultural production, bitter-water irrigation is bound to develop. The area is the bottom of the saline calcareous soil, bitter water irrigation after the accumulation of a large amount of salt in the upper soil, resulting in secondary soil salinization soon, affecting the further development of agricultural production. Soil salinity with the movement of water, the two are in line with the traces of the same. Salt accumulation and desalination of soil are the result of the movement of soil moisture as the irrigation and climate change seasonally. because