Nitrogen, phosphorus and potassium fertilizers should be used inproper proportions fertilizing for leaf-vegetables and should be used asbasic manure; Appling only nitrogen manure was sure to cause accumulation of nitrate easily.
Nitrogen, phosphorus and potassium fertilizers should be used inproper proportions fertilizing for leaf-vegetables and should be used asbasic manure; Appling only nitrogen manure was sure to cause accumulation of nitrate easily.
叶类蔬菜施肥应氮、磷、钾合理搭配，并宜作底肥施用；单施氮肥容易导致硝酸盐的大量积累。