南京农业大学学报2017，Vol.40Issue(3)：367-375,9.DOI:10.7685/jnau.201609014
稻秆还田方式对稻麦轮作农田CH4和N2O排放的影响
Impact of rice straw return methods on CH4 and N2O emissions across a rice-wheat rotation
摘要
Abstract
[Objectives] The purpose of this study was to determine the effects of different straw returning methods on the greenhouse gas emission,and thus,to provide reference for selecting a reasonable straw returning methods in rice-wheat rotation system.[Methods] A field experiment was conducted during 2014-2015 to investigate the effects of the different ways of rice straw returning on grccnhouse gas emission by using the method of static chamber-gas chromatographic techniques in rice-wheat rotation system.Four treatments (i.e.without rice straw returning,CK;rice straw covered returning,RC;rice straw rotary returning,RR;rice straw concentrated ditch-buried returning,RD) were implemented in this experiment.[Results] Results showed that compared with CK,rice straw returning increased CH4 emission in rice season,and RC had significantly higher CH4 emission than other treatments.While CH4 emissions remained in the lower level in wheat season.Compared to CK,rice straw returning increased N2O emission in both rice and wheat season,but there was no significant difference between all treatments in rice season.N2O emission under RC was significantly higher than CK,but no significant difference between the three straw returning methods.Among the three straw returning methods,RC had the highest annual CH4 and N2O emissions,and RD had the lowest,moreover,RD had the least annual global warming potential.Rice straw returning could improve annual crop yield.Compared with CK,RR and RD could increase 6.70％ and 9.75％,respectively.Compared with RC and RR,RD could decrease greenhouse gas emissions intensity by 48.13％ and 3.38％,respectively.[Conclusions] Therefore,rice straw concentrated ditch-buried returning was a suitable method in rice-wheat rotation system.关键词
稻秆/秸秆还田方式/稻麦轮作/温室气体Key words
rice straw/straw returning method/rice-wheat rotation/greenhouse gases分类
农业科技引用本文复制引用
王保君,胡乃娟,顾泽海,陈兵林,陈利根,朱利群..稻秆还田方式对稻麦轮作农田CH4和N2O排放的影响[J].南京农业大学学报,2017,40(3):367-375,9.基金项目
国家科技支撑计划项目(2012BAD14B12) （2012BAD14B12）
中国博士后科学基金项目(2015M570463) （2015M570463）
中央高校基本科研业务费专项资金(SKPT2015028) （SKPT2015028）
