应用DNDC模型分析施肥和翻耕方式变化对旱田土壤N_2O释放的潜在影响  

Potential effect of fertilising and tilling on N_2O emission from upland soils analyzed by DNDC model.

作　　者：徐文彬[1] 刘维屏[1] 刘广深[1] 

机构地区：[1]浙江大学环境科学研究所,杭州310027

出　　处：《应用生态学报》2001年第6期917-922,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金 (498730 34 ;40 0 730 34);中国博士后科学基金资助项目

摘　　要：以贵州省玉米 油菜轮作田和大豆 冬小麦轮作田为N2 O释放通量测量对象 ,根据DNDC模型能较好地拟合田间N2 O释放通量季节变化及施肥和翻耕对释放的影响 ,采用DNDC模型定量探讨了上述作物生长季节有机肥施用量、N肥施用量及施肥日期、N肥类型和施肥深度、翻耕深度和翻耕日期等变化对亚热带旱田生态系统N2 O释放的潜在影响 .为今后通过改变施肥和耕作方式来控制农业土壤N2 O释放量提供研究基础和参考 .A corn-rape and a soybean-winter wheat rotation field in Guizhou Province were selected to measure N\-2O fluxes from sub-tropical upland soils.Based on the function of the DNDC model in well elucidating the seasonal changes of N\-2O flux and the effects of fertilising and tilling on them,it was thus used to assess the potential effect of variations in application of manure and N-fertilisers,fertilising timing,N-fertiliser types,fertilising depth,and tillage on N\-2O fluxes from sub-tropical upland soils.The results could be used to enact relevant policies,and to explore the potential for controlling N\-2O emissions from agricultural soils by changing fertilising and tilling.

关 键 词：N2O释放 施肥 翻耕 旱田土壤 DNDC模型 温室气体 

分 类 号：X144[环境科学与工程—环境科学]