沟渠N2O排放研究进展  

Research Progress on N2O Emissions from Ditches

作　　者：张丰粟 王小国[1,2,3] ZHANG Feng-su;WANG Xiao-guo(Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Mountain Surface Process and Ecological Regulation,Chinese Academy of Sciences,Chengdu 610041,China)

机构地区：[1]中国科学院山地灾害与环境研究所,四川成都610041 [2]中国科学院大学,北京100049 [3]中国科学院山地表生过程与生态调控重点实验室,四川成都610041

出　　处：《生态与农村环境学报》2021年第1期10-18,共9页Journal of Ecology and Rural Environment

基　　金：国家重点研发项目(2017YFD0800505);国家自然科学基金(41371302)。

摘　　要：沟渠作为一种特殊的湿地生态系统,具有很高的氧化还原能力和温室气体排放潜力,其突出特点为干湿交替频繁,受人为扰动大。沟渠湿地作为氧化亚氮(N2O)的重要排放源,其排放通量受沟渠的基质理化性质、水文、植被和外源养分输入等多种因素影响。综述了国内外沟渠中N2O排放通量的测定方法,对不同地区村镇生活污水排放沟渠和农田排灌沟渠两种主要类型沟渠中N2O排放通量进行对比和总结,将沟渠中N2O排放通量时空差异及影响因素进行对比分析,并提出展望,即深入沟渠硝化-反硝化容量的研究、综合考虑各因子对N2O排放的影响等,以期为沟渠的环境友好管理提出建议。The ditch,as a special wetland ecosystem,has high redox capacity and greenhouse gas emission potential.Its prominent feature is frequent wetting-drying alternations and also greatly disturbed by human activities.The ditch wetlands is an important source of nitrous oxide(N2O),while N2O emissions from ditch wetlands are regulated by various physical and chemical factors,such as hydrological characteristics,vegetation species and loadings of exogenous nutrients.Here the available studies on the quantification approach of N2O emissions from ditch wetlands done in China and worldwide were synthesized,thereby comparing the N2O fluxes from rural sewage ditches and agricultural ditches in different regions.Furthermore,the spatial-temporal variations in N2O emissions from ditch wetlands are analyzed and the key regulators underlying are explored.Overall,further studies are needed to well understand N2O emissions and the regulators in ditch systems,in particular,investigations on capacity of nitrification-denitrification in ditch wetlands should be strengthened,for the environmental friendly management practices on ditches.

关 键 词：沟渠 N2O排放 影响因素 

分 类 号：X32[环境科学与工程—环境工程] X82