湖北省油菜测土配方施肥下N_2O减排潜力估算  

Estimation of N_2O mitigation potential from rape planting through soil testing and formulated fertilization in Hubei Province

作　　者：李夏菲[1] 杨璐[1] 于书霞[1] 刘微[1] 王德鑫[2] 胡荣桂[1] 

机构地区：[1]华中农业大学资源与环境学院,湖北武汉430070 [2]华中农业大学经济管理学院,湖北武汉430070

出　　处：《中国环境科学》2015年第12期3817-3823,共7页China Environmental Science

基　　金：中央高校基本科研业务费专项资金资助(2662016PY065);中国清洁发展机制基金赠款项目"湖北省低碳农业模式研究"(2012020)

摘　　要：以油菜种植大省一湖北省为案例地,在分析农田氮肥施用与油菜籽产量的基础上,依据氮肥利用率变化,估算测土配方施肥技术在湖北省全面推广的情况下,带来的N_2O减排潜力.结果表明在湖北省油菜种植中,测土配方施肥技术的推广将带来646.32ktCO_2-eq的理论减排.以2012年湖北省油菜测土配方推广情况为基础,进一步全面实施该项技术,将产生173.91 ktCO_2-eq的减排量,占油菜种植因氮肥使用而产生的N_2O排放总量的13.98%.测土配方施肥通过优化营养元素配比提高油菜氮肥利用效率,是一项控制与减少农业N_2O。排放、减少氮素在环境中盈余量的有效措施.Based on the relationship between nitrogen fertilizer and the production of rapeseed and the changes of nitrogen use efficiency,this study estimates N2O mitigation potential from rape planting through soil testing and formulated fertilization in Hubei Province.The application of soil testing and formulated fertilization will bring theoretically 646.32 kt CO2-eq emission reductions in Hubei Province.Based on the current status of soil testing and formulated fertilization in rape planting,the extensive applications of this measure will produce 173.91 kt CO2-eq reduction,accounting for 13.98%of total N2O emission caused by nitrogen fertilizer from rape planting.The measure improves the nitrogen use efficiency by balancing the nutrient supply,thereby reduces the corresponding N2O emission.Therefore,soil testing and formulated fertilization is an effective means to mitigate agricultural N2O emissions,and reduce surplus capacity of nitrogen in environment.

关 键 词：油菜 测土配方 氧化亚氮 减排潜力 

分 类 号：X16[环境科学与工程—环境科学]