叶面追肥也叫根外追肥，是指把作物所需的营养成份施在作物的地上部器官，使作物直接获取肥料中有效养分的一种追肥方法。目前，叶面追肥技术在各地发展很快，但在使用过程中也存在着一些问题。为了有利于进一步提高叶面追肥的效果，使用中应注意以下几个问题。 一、选择适宜的 Leaf top dressing, also known as root top dressing, refers to the nutrients required for crop application in the shoots aboveground organs, so that crops can directly obtain effective nutrients in fertilizer, a top dressing method. At present, foliar fertilizer technology has developed rapidly in various places, but there are also some problems in the process of using it. In order to help further improve the effect of leaf top dressing, should pay attention to the following questions. First, choose the right one