根外施肥是将肥料配成一定浓度的水溶液,直接喷在作物叶片上,由叶片吸收供给作物生长发育所需要的养料。根外施肥是一种经济速效的施肥方法,可弥补不良环境条件下和作物生长发育后期,根系吸收养料的不足,是土壤施肥的补充。根外施肥在蔬菜上已广泛应用,不仅能提高蔬菜产量,而且还能改善品质和延长供应期。在使用上,应掌握以下几个要点,才能提高根外施肥的效果。一、正确选择与蔬菜品种相适应的叶面肥肥料种类较多,但并不是所有肥料都可用作根外施肥。不同肥料种类叶片的吸收和利用能力不同,应用效果有一定差异,在使用时应注意选择。凡收获物为肉 Root fertilization is the fertilizer dubbed a certain concentration of aqueous solution, sprayed directly on the crop leaves, the leaves absorb the nutrients needed for crop growth and development. Fertilization on the outside of the root is an economical and effective method of fertilization, which can make up for the deficiencies of nutrient absorption in the root system under adverse environmental conditions and crop growth and development and is a supplement to soil fertilization. Root out-fertilization has been widely used on vegetables, not only to increase vegetable yield, but also to improve quality and extend supply. In use, should grasp the following points in order to improve the effect of fertilizer outside the root. First, the correct choice of varieties of vegetables and more suitable foliar fertilizer varieties, but not all fertilizers can be used as root fertilization. Different types of fertilizer leaves the ability to absorb and use different applications have a certain difference, should pay attention to the choice of use. Where the harvest is meat