旱作农业蓄水与保墒密切联系,因此,在尽可能地蓄住天然降水,使其转化为土壤水后,最主要的工作是把它保存在土壤中,并减少它的蒸发散失。地膜覆盖是,保住天然降水和土壤蓄水的一项增产节水重要技术。 Because of the close relationship between dry farming water storage and soil moisture conservation, the most important job of storing as much as possible of natural precipitation into soil water is to keep it in the soil and reduce its evaporation loss. Film mulching is an important technique to save water and save natural rainfall and soil water.