应用DNDC模型估算区域农业土壤N_2O释放通量和释放量——以贵州省为例  

DNDC Model Estimates of N_2O Emission from Regional Agricultural Soils——A Guizhou Province Case Study

作　　者：徐文彬[1] 163.net中国科学院地球化学研究所环境地球化学国家重点实验室 贵阳550002 洪业汤[2] 陈旭晖 林庆华[2] 王羽 

机构地区：[1]浙江大学环境与资源化学研究所 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002 [3]贵州省农科院土壤肥料研究所,贵阳550006

出　　处：《环境科学》2000年第2期11-15,共5页Environmental Science

基　　金：国家自然科学基金!资助项目编号:49873034

摘　　要：根据ＤＮＤＣ模型能较好地拟合贵州省玉米－油菜轮作田、大豆－冬小麦轮作田和休耕地的Ｎ２Ｏ释放通量及其影响因子的季节变化模式，采用ＤＮＤＣ模型估算了以县为空间分辨尺度的贵州省农业土壤１９９５ 年Ｎ２Ｏ释放通量和释放量；定量评估了施肥和耕作农业活动对该地区Ｎ２Ｏ释放量的贡献． 本工作将为准确估算我国农业土壤的Ｎ２Ｏ释放量和提出科学的减排措施提供研究基础和方法参考．Based on the success of DNDC model elucidating N 2O emissions and its influencing factors from corn rape rotation,soybean winter wheat rotation,and fallow study plots in Guizhou Province,DNDC model was used to estimate N 2O emission from entire agricultural lands at county scale in Guizhou in 1995, and to assess the contribution of farming practices including fertilizing and tilling on N 2O emission.This research objective was to explore the potential for using DNDC to identify the magnitude of,and controls on,N 2O emissions from agriculture in a policy relevant framework in China.

关 键 词：DNDC模型 农业土壤 一氧化二氮 释放量 土壤污染 

分 类 号：X530.2[环境科学与工程—环境工程]