生态环境学报2011，Vol.20Issue(8)：1326-1331,6.
耕作方式对太湖地区冬小麦生长季N2O排放的影响
Effect of tillage methods on N2O emissions during winter wheat season in Taihu region
摘要
Abstract
From November 2009 to June 2010, we conducted a field experiment on winter wheat (Triticum aestivum L.) to investigate the effect of tillage methods (no-tillage, reduced tillage and conventional tillage) on N2O emissions in Taihu region by using the method of static chamber-gas chromatographic techniques. The results demonstrated that during winter wheat season, the mean N2O fluxes with wheat crop of the no-tillage (NT), reduced tillage (RT) and conventional tillage (CT) were 67.11 μg·m-2·h-1 42.04 μg·m-2·h-1 and 51.40 μg·m-2·h-1, respectively. Without wheat crop, the mean N2O fluxes of the NT, RT and CT were 77.35 μg·m-2·h-1, 55.76 μg·m-2·h-1 and 66.95 μg·m-2·h-1, respectively. Correlation analysis showed that N2O emission flux under different tillage methods were positively related to soil temperature both at the depth of 5 cm and 10 cm during winter wheat season (r=0.400* - 0.654**, n=28). The average total emissions of N2O without wheat crop during winter wheat season were significantly higher than that with wheat crop. Compared to NT, RT decreased total emissions of N2O by 37.3% with wheat crop and by 28.0% without wheat crop, respectively. In contrast with CT, RT decreased total emissions of N2O by 17.9% with wheat crop and by 16.7% without wheat crop, respectively. The results of this study suggest that the reduced tillage is one of the effective measures to reduce total N2O emissions during winter wheat season in Taihu region.关键词
N2O排放/耕作方式/冬小麦/土壤温度/太湖地区Key words
N2O emission/ tillage methods/ winter wheat {Triticum aestivum L.)/ soil temperature/ Taihu region分类
资源环境引用本文复制引用
张岳芳,陈留根,王子臣,朱普平,盛婧,郑建初..耕作方式对太湖地区冬小麦生长季N2O排放的影响[J].生态环境学报,2011,20(8):1326-1331,6.基金项目
农业部公益性行业科研专项(201103001) （201103001）
国家科技支撑计划项目(2007BAD89B12) （2007BAD89B12）
