不同秸秆还田模式和施氮量对农田CO_2排放的影响  

Effect of straw-return and nitrogen fertilizer application on the CO_2 emission in farmland

作　　者：潘志勇[1] 吴文良[1] 牟子平[2] 王晓凤[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]苏州科技学院环境科学与工程系,苏州215011

出　　处：《土壤肥料》2006年第1期14-16,65,共4页Soils and Fertilizers

基　　金：国家自然科学基金重点项目"基于农田生态系统碳氮平衡的环境成本评估模型";"十五"国家科技攻关重大专项"区域生态农业技术规范与保障体系研究"(2002BA516A)资助

摘　　要：以山东省桓台县高产农田为试验对象,分析在高产条件下,不同秸秆还田模式和氮肥施用量对农田CO2排放的影响。结果表明,氮肥施用量与秸秆还田模式都是影响土壤CO2排放的重要因素,玉米秸秆和小麦秸秆全部还田的处理土壤CO2排放通量高于其它中低氮处理,而小麦秸秆还田与不还田的各处理间差别不大。麦秸还田配施高氮处理的CO2排放通量普遍高于其它处理。Huantai County was famous for its crop straw retum and high fertilizer input. The experiment was carried out for studying the effect of straw - return and nitrogen application on the CO2 emission in high - yield - farmland. The resuits indicated that different straw return and nitrogen application were two important factors to effect the CO2 emissions of soil. The CO2 emission of wheat - and - maize - straw - return treatment was higher than all of the other treatments and wheat - straw- return plus high level N fertilizer application showed the same result.

关 键 词：高产农田 秸秆还田 氮肥 CO2排放 

分 类 号：S154.1[农业科学—土壤学]