在常年的蔬菜生产中,大量的施用肥料、不合理的喷施农药制约着无公害蔬菜的发展,蔬菜中硝酸盐的含量超标令人担忧,可怕的农药残留更令人胆战心惊。让菜农不能理解的是,在施用大量的肥料及农药的同时,蔬菜产量并不能大幅度的增产,而且蔬菜品质在逐年下降。所以在生产中发现并总 In perennial vegetable production, a large number of fertilizer, irrational spraying of pesticides restricts the development of pollution-free vegetables, excessive levels of vegetables in the nitrate is worrying, terrible pesticide residues even more frightening. What the vegetable growers can not understand is that while applying a large amount of fertilizers and pesticides, the yield of vegetables can not be increased substantially, and the quality of vegetables is declining year by year. So found in the production and total