土壤水分直接影响作物生长发育,而且对土壤微生物的活动,土壤养分的分解与转化,土壤温度和土壤空气等各种理化生物性质,都有深刻地影响与制约作用。控制土壤水分,既是为了直接满足作物对水分的需要,又能调节和控制养分、微生物活动、空气、热量等因素,为作物的生长发育创造良好的条件。从且提高作物产量。土壤是多孔的,降雨或灌溉以后,土 Soil moisture directly affects crop growth and development, but also has a profound effect on the activities of soil microorganisms, decomposition and conversion of soil nutrients, soil temperature and soil air and other physical and chemical properties. Control of soil moisture is not only in order to directly meet the crop’s water needs, but also regulate and control nutrients, microbial activity, air, heat and other factors for crop growth and development to create good conditions. From and to increase crop yields. The soil is porous, after rainfall or irrigation, soil