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对宁南干旱山区早熟丰产马铃薯农田土壤水分的研究结果表明：马铃薯农田土壤水分动态变化可以分为三个活动时期，它与区域的降雨和分配有极强的相似性。土壤水分垂直变化规作可以分为速变层（０～２Ｏｃｍ），缓变层（２０～１２０ｃｍ）和相对稳定层（１２０～２００ｃｍ）。并研究了各个层间的水分的关系。早熟丰产马铃薯的耗水量约为３１２～３９４ｍｍ。前期主要来自灌水补充的底墒，后期来自降雨。地膜覆盖技术比露地更能够有效地减少水分蒸发，水分生产率高，在干旱山区发展集水窑窖灌溉结合地膜技术推广早熟马铃薯，提高商品率，增加收入，前景广阔。
The results showed that the dynamic changes of soil moisture in potato farmland could be divided into three active periods, which had a strong similarity with rainfall and distribution in the region. Vertical changes in soil moisture can be divided into rapid change layer (0 ~ 2Ocm), slow change layer (20 ~ 120cm) and relatively stable layer (120 ~ 200cm). And studied the relationship between the various layers of water. Early-season high yield potato water consumption is about 312 ~ 394mm. Pre-primary irrigation from the end of moisture, the latter from the rainfall. Compared with the open field, the mulching technology can effectively reduce the evaporation of water and has high water productivity. The development of water harvesting cellar irrigation in the arid mountainous area combined with plastic film technology can promote the precocious potato, increase the commodity rate and increase the income.