选择肥料要适宜。叶菜类蔬菜多选用尿素、磷酸二氢钾;茄果类、瓜类蔬菜多选用氮、磷、钾混合液或多元复合肥;根茎类蔬菜多选用磷、钾肥。喷施浓度要适宜。叶面施肥的适宜浓度为：尿素1%-2%;磷酸二氢钾0.2%-0.5%;硫酸铵0.2%-0.3%;硼砂0.03%-0.1%;过磷酸钙1%-2%;米醋0.3%;稀土0.3%-0.1%。喷施部位要适宜..