农业环境科学学报Issue(3)：585-591,7.DOI:10.11654/jaes.2015.03.023
不同稻草还田模式下双季稻田周年CH4排放特征及温室效应
Annual CH4 Emission and Greenhouse Effects in Double Cropping Rice Fields with Different Rice Straw Returning Methods
摘要
Abstract
Returning rice straw directly to soil may increase CH4 emissions from rice fields. However, it is unclear how different straw re-turning methods influence CH4 emissions. In this work, a static chamber-gas chromatography technique was used to investigate CH4 emis-sions from double cropping rice(Oryza sativa L.)fields with different rice straw returning methods with or without soil tillage, namely tillage without straw returning(CK), tillage with incinerated rice straw returning(BST), no-tillage with rice straw covering in the growing season and high stakes in winter fallow(SNTH), no- tillage with rice straw covering in growing season and buried rice straw in winter fallow (SNTB),and tillage with straw returning and buried straw in winter fallow(STB). Results showed that CH4 emissions from early rice and late rice seasons accounted for 43.9% and 52.1% of the annual total emissions, respectively, while only 4.0% of CH4 emissions was from winter fallow season. Straw soil returning increased the total annual CH4 emissions by 25.9%~92.8%(P<0.05), compared with the CK. The STB treatment produced less CH4 emissions than SNTH and SNTB did. The greenhouse effects of different treatments were STB>BST>SNTB>SNTH>CK. In conclusion, the greenhouse effects would be mitigated to some extent by straw covering and no-tillage in rice growth season or stubble or straw burying in winter fallow season compared to straw direct returning to soil. Therefore, SNTH and SNTB could effec-tively reduce the annual CH4 emission in double cropping rice system.关键词
双季稻/稻田/稻草还田/甲烷Key words
double cropping rice field/paddy soil/rice straw returning to soil/CH4分类
资源环境引用本文复制引用
彭华,纪雄辉,吴家梅,朱坚,黄涓..不同稻草还田模式下双季稻田周年CH4排放特征及温室效应[J].农业环境科学学报,2015,(3):585-591,7.基金项目
国家自然科学基金（31300413）；国家科技支撑计划项目 （）
