一、看蔬菜种类。白菜、菠菜等叶菜类，需氮肥较多，西红柿、黄瓜等果类，除需要氮肥外，对磷、钾肥的需求量较高；生长期长的蔬菜需肥多，除施足底肥外，生育期各阶段还要分期追肥。还可把根外喷肥作为土壤追肥的补充方法，此法用肥量少，肥效快。氨现钾和微量元素肥都可以进 First, look at the type of vegetables. Cabbage, spinach and other leafy vegetables, more nitrogen fertilizer, tomatoes, cucumbers and other fruits, in addition to the need for nitrogen fertilizer, the demand for phosphorus and potassium fertilizer higher; long-growing vegetables need more fertilizer, Stages of fertility stages but also top-dressing. Root out of fertilizer can also be used as top-dressing method of supplementing the soil, this method less fertilizer, fertilizer fast. Ammonia potassium and trace element fertilizer can enter