据有关资料介绍,种植蔬菜必须根据其摄入氮素量的不同,进行科学施用氮肥,才能实现增产增收。一般情况下,目前生产上种植的蔬菜,按其对氮的摄入量大体可分为三类:即高氮型、中氮型及低氮型。 According to relevant information, planting vegetables must be based on the amount of nitrogen in their different doses of scientific application of nitrogen fertilizer, in order to achieve increased production and income. Under normal circumstances, the current production of vegetables grown, according to their intake of nitrogen can be roughly divided into three categories: high nitrogen, medium nitrogen and low nitrogen type.