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本研究以吨粮县山东桓台为试验基地,分析高产条件下不同秸秆还田模式和氮肥水平对土壤有机碳输出——土壤呼吸的影响及其变化规律。研究表明,土壤呼吸与温度的相关程度较大,且与日平均气温和地温有较好的指数关系。高产(吨粮)条件下土壤呼吸的强度在(CO_2)3142～5057g·m~(-2)·a~(-1)之间。有机肥处理的土壤呼吸强度大于其他处理,小麦和玉米秸秆全部还田处理>小麦秸秆还田处理>秸秆焚烧处理。
In this study, we took Huantai County, Shandong Province as a test base to analyze the effects of different straw returning patterns and nitrogen fertilizer levels on soil organic carbon export and soil respiration under high-yielding conditions. Studies have shown that the correlation between soil respiration and temperature is relatively large, and it has a good exponential relationship with the average daily temperature and ground temperature. The soil respiration intensity under the high yield (ton grain) ranged from 3142 to 5057 g · m -2 · a -1. Respiration intensity of soil treated with organic manure was greater than that of other treatments, with all wheat and corn stalks returned to field> wheat straw returned to field> straw burned.