The potential effect of variations in climate and agricultural practice on N_2O emissions (Ⅰ)——Variations in climate  

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 

出　　处：《Chinese Science Bulletin》1999年第S2期95-97,共3页

摘　　要：N₂O is an important greenhouse gas, its major anthropogenic source is agricultural soils and its emissionsare primarily influenced by climate and agricultural practice. This study chose a corn-rape rotation, asoybean-winter wheat rotation and a fallow field in Guizhou Province, westsouthern China as N₂O emissions from subtropical agricultural soils study plots. Based on the success of test and validation exercise ofmeasured and Decomposition-Denitrification（DNDC） modeled N₂O emission, and several associatedvariables, from above study fields exhibiting similar trends and magnitudes, we expanded DNDC modelto systematically assess the potential effect of variations in climate and farming practice in future on N₂Oemissions from subtropical agricultural soils as above three study fields case study. The baseline condi-

关 键 词：N₂O emission CLIMATE change POTENTIAL EFFECT agricultural soil. 

分 类 号：P595[天文地球—地球化学]