叶面追肥根外施肥是有针对性地将一种或几种肥料的水溶液，喷洒在叶面上。此法简便易行，发挥作用快，避免了肥料被土壤固定或流失，并有利于矫正蔬菜缺素症。特别是在田间短期积水或蔬菜根系受地下病虫为害，使蔬菜根系吸收养分受到严重影响时，采用叶面追肥能暂时弥补根 Foliar fertilizer  root fertilization outside 是 is targeted to one or several fertilizer solution, sprayed on the foliage. This method is simple and easy to play a role fast, to avoid the fertilizer is fixed or lost soil, and is conducive to correcting vegetable deficiency syndrome. Especially in the field of short-term water or vegetable roots by pests and diseases, the root vegetables to nutrient absorption is seriously affected, the use of foliar fertilizer can temporarily make up for the root