一、根据作物的类型进行根外施肥。像棉花、甘薯、马铃薯、油菜、烟草等双子叶植物进行根外施肥的效果就很显著。因为这些植物的面积大,角质膜薄,而叶片吸收无机盐的途径主要是依靠角质膜。因而溶液就容易渗透进去。相反,水稻、小麦、高梁等单子叶植物利用根外施肥的效果就差。二、喷施时尽量喷到生长中心去。即最幼嫩 First, according to the type of crop root fertilization. Fertilizers such as cotton, sweet potato, potato, rape, tobacco and other dicots are very effective. Because of the large area of ​​these plants, the cuticle is thin, and the way the leaves absorb inorganic salts depends mainly on the cuticle. Thus the solution is easy to penetrate in. In contrast, monocotyledonous plants such as rice, wheat, sorghum, etc., have a poor effect of utilizing external fertilization. Second, spraying spray as far as possible to the growth center. That is the most young