摘要
WE expanded Decomposition-Denitrification （DNDC）modeling study to systematically assess the potential effect of farming practice on N<sub>2</sub>O emission by choosing a corn-rape rotation and a soybean-winterwheat rotation field in Guizhou Province, westsouthern China, asN<sub>2</sub>O emission from subtropical agricultural soil study plots. These sensitivity studies address questions relevant to issue of how change in fanning practice might be used to mitigate emissions. Manure additions had the most pronounced impact on N<sub>2</sub>O emissions of farming practice simulatedand the influence of manure addition was nonlinear （fig. 1）. This result is consistent with previous studies for an Iowa corn field. The addition of manure remarkably elevates the level of organic carbon, enhances soil nitrogen mineralization, and increases the efficiency of N<sub>2</sub>O production. Simulated results alsoshowed that the influence of manure additions on N<sub>2</sub>O emission from soybean-winter wheat field had
作者
XU Wenbin~(1,2), HONG Yetang~1, CHEN Xuhui~3, LI Changsheng~4, LIN Qinghua~1 and WANG Yu~1, 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2. Institute of Environment and Resources Chemistry, Zhejiang University, Hangzhou 310027, China
3. Soil and Fertilizer Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550013, China
4. Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, USA
