一什么叫根外追肥,为什么要进行根外追肥在植物生长期中施用肥料就叫做追肥。而施用追肥的方法又有各式各样,一般来讲分为两种:一种是施到土壤里经过植物根部来供给植物利用;另一种是直接喷撒在植物叶子上供给植物利用。后一种以含有营养物质的溶液或粉末喷撒在叶子上的追肥方法就叫做根外追肥。这种追肥方法对于提高农业生产有很大的意义。因为采用这种办法有下面的一些好处: What is the root top dressing, why root top dressing fertilizer application in the plant growth stage is called top dressing. There are a variety of ways to apply fertilizer, generally speaking, divided into two kinds: one is applied to the soil through the plant roots to supply plants; the other is sprayed directly on the plant leaves for plant use. After a solution containing nutrients or powder sprayed on the leaves of the top dressing method is called top dressing. This method of dressing is of great significance to improving agricultural production. Because of this approach has the following advantages: