以山东省桓台县高产农田为试验对象,分析在高产条件下,不同秸秆还田模式和氮肥施用量对农田CO2排放的影响。结果表明,氮肥施用量与秸秆还田模式都是影响土壤CO2排放的重要因素,玉米秸秆和小麦秸秆全部还田的处理土壤CO2排放通量高于其它中低氮处理,而小麦秸秆还田与不还田的各处理间差别不大。麦秸还田配施高氮处理的CO2排放通量普遍高于其它处理。 Taking high yielding farmland in Huantai County of Shandong Province as the test object, the effects of different straw returning patterns and nitrogen fertilizer application on farmland CO2 emission under high yielding condition were analyzed. The results showed that both nitrogen fertilizer application rate and straw returning mode were the important factors affecting the soil CO2 emission. The fluxes of soil CO2 emissions from corn straw and wheat straw were higher than those from other low and medium nitrogen treatments. However, There is not much difference between the treatments without returning to the field. The flux of CO2 emission from wheat straw returning to field with high N application was generally higher than other treatments.