南方农业学报2012，Vol.43Issue(10)：1509-1513,5.DOI:10.3969/j.issn.2095-1191.2012.10.1509
不同耕作方式与施氮水平下稻田CH4排放的动态变化
Dynamic changes of CH4 emission from rice fields under different tillage patterns and nitrogen application levels
摘要
Abstract
This research aimed to explore the effects of tillage pattern and nitrogen fertilizer on CH4 emission from rice field. [ Method]The changes in rice growth daily variations of CH4 emission under two kinds of farming methods (conventional tillage and no-tillage), and two kinds of N levels(N and no-N)in fields were explored and analyzed. [Result]The CH4 emission of each treatment generally displayed a bimodal peak pattern, which was at the tillering stage and heading stage, respectively. Before rice elongation, the no-tillage treatment clearly reduced the CH4 emissions flux from rice fields. After rice elongation, the.. CH4 emission flux from no-tillage rice fields was slightly higher than that of the conventional tillage rice fields. The no-tillage treatment reduced the CH4 emissions flux by 32.35% in total compared to that from the conventional tillage treatment during rice growing period. In both farm lands, the nitrogen fertilizer dramatically increased the CH4 emissions by 2.73-3.26 times compared to no-nitrogen fertilizer treatment. The diurnal variation of CH4 emissions from the rice fields significantly differed from eachother under different tillage patterns. The peak of CR, emissions flux from the no-tillage rice fields appeared later, while the dip occurred earlier; its diurnal variation also changed slightly. [ Conclusion ]The CH4 emission flux from no-tillage rice fields was lower than that from the conventional tillage rice fields throughout the rice growing period. Nitrogen fertilization significantly improved the paddy CH4 emissions.关键词
水稻/耕作方式/施氮/CH4排放/动态变化Key words
rice/ tillage pattern/ nitrogen application/ CH4 emissions/ dynamic change分类
农业科技引用本文复制引用
郑土英,杨彩玲,徐世宏,唐新莲,张玉,汪妮娜,江立庚..不同耕作方式与施氮水平下稻田CH4排放的动态变化[J].南方农业学报,2012,43(10):1509-1513,5.基金项目
广西科学基金重点项目(0991010Z) （0991010Z）
