免耕对农田土壤N_2O排放影响及作用机制研究进展  

Effects of No-Tillage on Agricultural Soil N_2O Emissions:A Review

作　　者：蔡延江[1,2] 丁维新[1] 项剑[1,2] 

机构地区：[1]中国科学院,南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049

出　　处：《土壤通报》2012年第4期1013-1018,共6页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目(40971134);中国科学院知识创新重要方向性项目(KZCX2-YW-439)赞助

摘　　要：免耕在促进农业可持续发展和有效分馏大气碳的同时还可影响土壤N2O排放,但迄今为止关于免耕对农田土壤N2O排放影响的研究结果却不尽一致,正效应间或负效应都存在。本文综述了免耕条件下土壤理化性状和生物性状的变化及其对N2O排放的影响,并指出实施免耕后土壤反硝化强度变化程度的不同是导致免耕对N2O排放影响效应不同的主要原因,最后提出了一些有待研究的问题。No-tillage has been promoted as an agricultural practice for enhancing agricultural sustainability and soil organic carbon sequestration concomitant with influencing on soil N2O emissions. However, conclusions on the effects of no-tillage on N2O emissions are inconsistent, which could be either positive or negative. In this paper, a review was presented to summarize the effects of no-tillage on soil physicochemical and biological properties and subsequent N20 emissions, and show the conflicting effects of no-tillage on soil N2O emissions being mainly attributed to the discrepant changes in denitrification intensity after conventional tillage＇s conversion into no-tillage. This review also put forward the perspective for the further study.

关 键 词：氧化亚氮 硝化 反硝化 土壤动物 温室气体 

分 类 号：X142[环境科学与工程—环境科学] X131.3