作物根外施肥，就是将肥料配制成一定浓度喷洒在作物地上部分，使养分通过茎叶的角质层和气孔等器官吸收进入植物体内。这种施肥方法具有直接供给养分，防止土壤固定；养分运转快，保证及时供应；节省肥料，经济效益高等优点，因此，常作为一种辅助性施肥方法。特别在作物生长 Fertilization of crops outside the root, that is, the fertilizer is formulated into a certain concentration sprayed on the ground above the crop, so that nutrients through the stratum corneum stalks and stomata and other organs into the body. This fertilization method has the direct supply of nutrients to prevent the soil fixed; nutrient running fast, to ensure timely supply; save fertilizer, high economic benefits, therefore, often as an auxiliary fertilization method. Especially in crop growth