摘要
2006年采用静态箱法观测对照(麦秆不还田)以及均匀混施和墒沟埋草2种麦秆还田方式下稻田CH4和N2O排放通量,探讨墒沟埋草对稻田CH4和N2O排放的影响。结果表明:墒沟埋草处理中,墒沟区域的CH4平均排放通量显著高于均匀混施处理(P<0.05),而N2O平均排放通量显著低于均匀混施处理(P<0.05)。墒沟埋草处理的CH4季节排放总量是对照的4.07倍,而与均匀混施处理无显著差异(P>0.05)。墒沟埋草处理的N2O季节排放总量是对照的70%,是均匀混施处理的3.14倍。
To study the effect of wheat straw buried in ditches on CH4 and N2O emissions from rice fields,a field experiment was conducted in 2006.CH4 and N2O fluxes were measured using closed-chamber technique in three treatments（no wheat straw applied,wheat straw evenly incorporated into the topsoil and wheat straw buried in ditches）.Results show that in the ditch area with wheat straw buried,the mean CH4 flux was significantly higher than that from the area with wheat straw evenly incorporated into the topsoil,while the mean N2O flux from the ditch area was significantly lower than that from the area with wheat straw evenly incorporated into the topsoil.The total seasonal CH4 emission from the area with wheat straw buried in ditches was 4.07 times as that from the area with no wheat straw applied,but there was no significant difference in total seasonal CH4 emission between the area with wheat straw buried in ditches and the area with wheat straw evenly incorporated into the topsoil.The total seasonal N2O emission from the area with wheat straw buried in ditches was 70% as that from the area with no wheat straw applied,and 3.14 times as that from the area with wheat straw evenly incorporated into the topsoil.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2008年第4期27-31,共5页
Journal of Ecology and Rural Environment
基金
国家自然科学基金(40621001,40671094)
科技部国际科技合作项目(2008DFA21330)
关键词
墒沟埋草
CH4排放量
N2O排放量
稻田
wheat straw buried in ditch
CH_4 emission
N_2O emission
rice field
