农业工程学报2012，Vol.28Issue(6)：210-216,7.DOI:10.3969/j.issn.1002-6819.2012.06.034
免耕条件下稻草还田方式对温室气体排放强度的影响
Effects of straw mulching on greenhouse gas intensity under on-tillage conditions
摘要
Abstract
To investigate the effects of straw mulching on greenhouse gas intensity (GHGI) under the no tilling conditions, a two-year (2008-2009) observation of greenhouse gas emissions with different treatments of NWS (no till + no residue ), HN (no till + high stubble) and SN (no till + straw mulching) was conducted by using the static chamber- GC (gas chromatography) method. The results indicated that the two treatments of HN and SN at the same rate of straw mulching had no difference in rice yield and increased GHGI compared to the NWS treatment. The GHGI of SN was lower than that of HN, which indicated that the HN treatment enhanced the ability of GHGI transportation by rice aerenchyma. On a 20-year scale, the average GHGI of methane was 109 times and 14 times greater than nitrous oxide for early and late rice, respectively, while on a 20-year scale, the value was lower, but still was 35 times and 3.77 times. In conclusion, the GHGI of the double-rice field will be affected by different practices of retaining rice residue determined. Compared with the HN treatment, straw mulching (SN) will be a reasonable choice for straw mulching. This study provides references for the enhancement of carbon sequestration and mitigation of GHGI emissions in a double-rice field in the Central China Region.关键词
稻草/温室气体/试验/免耕/高茬/甲烷/氧化亚氮Key words
straw/ greenhouses gases/ experiments/ no tillage/ high stubble/ covering/ CtLt/ N2O分类
农业科技引用本文复制引用
秦晓波,李玉娥,万运帆,石生伟,廖育林,刘运通,李勇..免耕条件下稻草还田方式对温室气体排放强度的影响[J].农业工程学报,2012,28(6):210-216,7.基金项目
公益性行业(农业)科研专项经费资助(201103039) （农业）
国家"973"计划(2012CB417106). （2012CB417106）
