By plastic film cover and once fertilization, the amount of leached nutrients in the soil was reduced, fertilization amount was about 12% less than that of naked bed planting, the soil surface temperature was increased by 3.
地膜覆盖一次性施肥可减少土壤养分淋失，施肥量比裸畦习惯施肥的减少１２％左右；并可提高畦内温度３。
