由于日光温室的施肥量往往是常规露地栽培蔬菜的几倍,而且施肥次数多,又缺乏雨水的淋溶作用,加之室内温度高,土壤水分蒸发量大,深层土壤水分沿毛细管上升,肥料随水向地表运动,深层土壤中的盐类也随之带到土壤表层,其结果是使表层土壤溶液浓度加 Because the amount of fertilizer in the greenhouse is often several times the conventional open-field cultivation of vegetables, but also the number of fertilization, but also the lack of rainfall leaching, coupled with high indoor temperature, soil moisture evaporation, soil moisture along the deep capillary rise, fertilizer with water Movement to the surface, deep soil salt also will be brought to the surface of the soil, the result is to make the surface soil solution concentration plus