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本区水资源发生严重危机,土壤干旱成了影响农业生产的主要限制因素。土壤干旱的原因除天然降水减少以外,还有过多的排走地表水,超量开采地下水,土壤物理性状恶化,土壤水分收支不平衡等原因。解决土壤干旱的途径,以利用好天然降水为上策。将有限的自然降水尽可能地多蓄入土体中,将渗入土壤之中的水分尽可能地减少非生产性消耗。本文还介绍了几种具体的有效措施。
Severe crisis of water resources in this area, soil drought has become the main limiting factor affecting agricultural production. In addition to the natural precipitation reduction, there are many reasons for soil drought, such as excessive drainage of surface water, over-exploitation of groundwater, deterioration of soil physical characteristics and unbalanced soil water balance. The solution to the problem of soil drought is to make good use of natural precipitation. Save as much natural rainfall as possible into the soil and minimize the non-productive consumption of water that penetrates into the soil. This article also describes several specific and effective measures.