GLEAMS是美国农业部开发的一个模拟农田氮磷循环的模型,主要用来评价农田管理措施的环境效益。本研究借助GLEAMS模型并基于几个典型施肥量的模型假设,模拟了南京市东郊小型蔬菜生态系统施肥量对作物养分元素吸收量的影响。结果表明,在研究区将有机肥的施入量因地而异的减少到现有施入量的45.2%～53.4%,并且将化肥的施入量减少到13.3%～96.9%,氮素吸收率可提高9.90～14.4个百分点,磷素吸收率可提高9.60～13.1个百分点。氮的淋溶量也减少到了原有量的26.5%～37.6%,同时每公顷蔬菜地可以节约施肥成本2080元～4400元。本模拟研究为提高蔬菜生产系统的经济效益和改善生态环境提供了重要的科学参考价值。 GLEAMS is a model developed by the U.S. Department of Agriculture to simulate the cycle of nitrogen and phosphorus in farmland and is mainly used to evaluate the environmental benefits of farmland management measures. Based on the GLEAMS model and several model assumptions of typical fertilization rates, this study simulated the effects of fertilization on crop nutrient uptake in small vegetable ecosystems in the eastern suburbs of Nanjing. The results showed that in the study area, the application rate of organic manure decreased from 45.2% to 53.4% ​​of the existing manure applied, and the amount of chemical fertilizer applied decreased to 13.3% -96.9%. The nitrogen uptake Rate can be increased 9.90 ~ 14.4 percentage points, phosphorus absorption rate can be increased 9.60 ~ 13.1 percentage points. The leaching of nitrogen also reduced to 26.5% ~ 37.6% of the original amount, meanwhile, the fertilization cost per hectare can be saved from 2080 yuan to 4400 yuan. This simulation study has provided important scientific reference value for improving the economic benefits of vegetable production system and improving the ecological environment.