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通过对黄土高原农业水资源状况及干旱发生规律的分析 ,认为黄土高原主要作物生长需水关键期恰好处于土壤水分的低值槽期 ,降水的高峰值又和土壤水分蒸发期同步 ,加之土壤水分变化幅度较大 ,贮水效率低 ,表现出土壤水分稳定性亏缺的常住性。黄土高原农田水分供需状况因作物种类和地区分布不同而异。通过大量的调查 ,提出黄土高原地区水资源高效开发利用的技术策略
Based on the analysis of the status of agricultural water resources and the occurrence of drought in the Loess Plateau, it is concluded that the critical period of water demand for main crop growth in the Loess Plateau is precisely in the low-sink period of soil moisture. The peak of precipitation is synchronized with the evaporation of soil moisture. Varying range, water storage efficiency is low, showing the stability of the soil moisture stability of the resident. The supply and demand of farmland water in the Loess Plateau varies according to the crop species and the regional distribution. Through a large number of surveys, the technical strategy for efficient development and utilization of water resources in the Loess Plateau