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河套地区从夏作登场到翌年春播期间,长达六、七个月之久。此时旱多雨少,土壤蒸发大,耗水量多,盐碱上升快。这些气候条件决定了当地采用储水灌溉的必要性。储水灌溉即播前灌水,其主要目的有二:一是蓄墒,二是淋盐。蓄墒是为了保证春播期间种籽发芽及幼苗茁壮成长对水分的需要;淋盐是藉储水灌溉冲淡土壤所含有害盐类,以利作物正常生长发育。
Hetao debut from summer to spring planting the following year, up to six or seven months. At this time more rain and less dry, soil evaporation, water consumption, salt rise faster. These climatic conditions determine the need for local use of storage irrigation. Water storage irrigation that is broadcast before sowing, its main purpose is to have two: First, soil moisture, and second, salt. Soil moisture is to ensure the seed germination during spring sowing and the seedlings thrive on the water needs; leaching salt is to dilute the soil containing harmful salts by water storage in order to facilitate the normal crop growth and development.