在蔬菜氮肥长期定位试验条件下分析了不同类型蔬菜生物产量、经济产量及经济（产量）系数的变化以及与土壤肥力的关系，建立了处理条件下的产量变化模型，进一步证明了有机肥与Ｎ素化肥配施的显著增产效果，根据蔬菜的产量效应将试验蔬菜划分为喜Ｎ型蔬菜、忌高Ｎ型蔬菜及Ｎ素敏感性蔬菜３种类型，并提出Ｎ肥施用上应注意的问题 The changes of biomass, economic yield and economic (yield) coefficient of different types of vegetables and the relationship with soil fertility were analyzed under long-term nitrogen fertilization conditions in vegetables. The yield change models under the treatment conditions were established, which further proved that the organic fertilizers and N The results showed that the tested vegetables were divided into three types, ie N-type vegetables, Avoid high N-type vegetables and N-sensitive vegetables according to the yield effect of vegetables, and put forward the problems that should be noticed when applying N fertilizers