DOI: 10.1111/gcb.13185
论文题名: Methane and nitrous oxide emissions under no-till farming in China: A meta-analysis
作者: Zhao X. ; Liu S.-L. ; Pu C. ; Zhang X.-Q. ; Xue J.-F. ; Zhang R. ; Wang Y.-Q. ; Lal R. ; Zhang H.-L. ; Chen F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 4 起始页码: 1372
结束页码: 1384
语种: 英语
英文关键词: Climate change mitigation
; Meta-analysis
; Methane
; Nitrous oxide
; No-till
; Residue retention
Scopus关键词: climate change
; emission control
; environmental protection
; meta-analysis
; methane
; nitrous oxide
; zero tillage
; China
; air pollutant
; methane
; nitrous oxide
; soil
; agriculture
; air pollutant
; analysis
; chemistry
; China
; meta analysis
; procedures
; soil
; Agriculture
; Air Pollutants
; China
; Methane
; Nitrous Oxide
; Soil
英文摘要: No-till (NT) practices are among promising options toward adaptation and mitigation of climate change. However, the mitigation effectiveness of NT depends not only on its carbon sequestration potential but also on soil-derived CH4 and N2O emissions. A meta-analysis was conducted, using a dataset involving 136 comparisons from 39 studies in China, to identify site-specific factors which influence CH4 emission, CH4 uptake, and N2O emission under NT. Comparative treatments involved NT without residue retention (NT0), NT with residue retention (NTR), compared to plow tillage (PT) with residue removed (PT0). Overall, NT0 significantly decreased CH4 emission by ~30% (P < 0.05) compared to PT0 with an average emission 218.8 kg ha-1 for rice paddies. However, the increase in N2O emission could partly offset the benefits of the decrease in CH4 emission under NT compared to PT0. NTR significantly enhanced N2O emission by 82.1%, 25.5%, and 20.8% (P < 0.05) compared to PT0 for rice paddies, acid soils, and the first 5 years of the experiments, respectively. The results from categorical meta-analysis indicated that the higher N2O emission could be mitigated by adopting NT within alkaline soils, for long-term duration, and with less N fertilization input when compared to PT0. In addition, the natural log (lnR) of response ratio of CH4 and N2O emissions under NT correlated positively (enhancing emission) with climate factors (temperature and precipitation) and negatively (reducing emission) with experimental duration, suggesting that avoiding excess soil wetness and using NT for a long term could enhance the benefits of NT. Therefore, a thorough understanding of the conditions favoring greenhouse gas(es) reductions is essential to achieving climate change mitigation and advancing food security in China. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61430
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of Agronomy and Biotechnology, Key Laboratory of Farming System, Ministry of Agriculture of China, China Agricultural University, Beijing, China; Carbon Management and Sequestration Center, School of Environment and Natural Resources, The Ohio State University, Columbus, OH, United States
Recommended Citation:
Zhao X.,Liu S.-L.,Pu C.,et al. Methane and nitrous oxide emissions under no-till farming in China: A meta-analysis[J]. Global Change Biology,2016-01-01,22(4)