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Stover retention rather than no-till decreases the global warming potential of rainfed continuous maize cropland

文献类型：期刊论文

作者Fan, Jianling1; Luo, Ruyi1; Liu, Deyan1; Chen, Zengming1; Luo, Jiafa2; Boland, Nanthi3; Tang, Jianwu4; Hao, Mingde5; McConkey, Brian6; Ding, Weixin1
刊名FIELD CROPS RESEARCH
出版日期2018-04-15
卷号219页码:14-23
关键词Stover retention No-till Nitrous oxide Soil organic carbon Global warming potential
ISSN号0378-4290
DOI10.1016/j.fcr.2018.01.023
通讯作者Fan, Jianling(jlfan@issas.ac.cn) ; Ding, Weixin(wxding@issas.ac.cn)
英文摘要During the past two decades, conservation management practices to sequester soil carbon have been recommended to mitigate greenhouse gas (GHG) emissions. However, the long-term effects of no-till, stover retention, and their interaction on soil organic carbon (SOC) stocks and GHG emissions from rainfed croplands remain uncertain. In this study, tillage practice and stover management effects were investigated in a long-term rainfed continuous maize cropping system. Measurements of soil nitrous oxide (N2O) and methane (CH4) fluxes and SOC change were conducted in four treatments: conventional tillage with stover removal (CT), conventional tillage with stover retention (CS), no tillage with stover removal (NT) and no tillage with stover retention (NS). Annual N2O emissions with stover retention (CS and NS, 0.52-0.74 kg N ha(-1) yr(-1)) were significantly higher (P < 0.0001) than those with stover removal (CT and NT, 0.40-0.55 kg N ha(-1) yr(-1)), but N2O emissions were not affected by tillage practice. Net CH4 consumption occurred in all treatments, but no significant effect of tillage practice or stover management was found. Surface (0-20 cm) SOC stocks decreased with both stover removal and no tillage practice, while deep SOC (20-100 cm) was not affected by tillage practice or stover management over ten years. Stover retention led to a net GHG sink with annual global warming potential (GWP) values of -2.52 +/- 0.05 and -1.03 +/- 0.02 Mg CO2-eq. ha(-1) yr(-1) for CS and NS, respectively, but stover removal practices were a net GHG source with annual GWP values of 0.83 +/- 0.04 and 1.40 +/- 0.04 Mg CO(2)eq. ha(-1) yr(-1) for CT and NT, respectively. Our results highlight the importance of C input from crop residues for increasing SOC stocks and mitigating GHG emissions. Therefore, conventional tillage with crop residue return is the most promising management system for simultaneously achieving maximum yield and minimum GWP.
WOS关键词NITROUS-OXIDE EMISSIONS ; SOIL ORGANIC-CARBON ; GREENHOUSE-GAS EMISSIONS ; CONTRASTING MANAGEMENT REGIMES ; IRRIGATED CONTINUOUS CORN ; FILLED PORE-SPACE ; LONG-TERM ; N2O EMISSIONS ; CLIMATE-CHANGE ; CROPPING SYSTEMS
资助项目National Basic Research Program of China[2014CB954002] ; Chinese Academy of Sciences[XDB15020100]
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000428007800002
出版者ELSEVIER SCIENCE BV
资助机构National Basic Research Program of China ; Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/60273]  
专题中国科学院地理科学与资源研究所
通讯作者Fan, Jianling; Ding, Weixin
作者单位1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
2.AgResearch, Ruakura Res Ctr, Hamilton 3240, New Zealand
3.Univ Newcastle, Global Ctr Environm Remediat, Newcastle, NSW 2308, Australia
4.Marine Biol Lab, Ecosyst Ctr, Woods Hole, MA 02543 USA
5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
6.Agr & Agri Food Canada, Swift Current Res & Dev Ctr, Swift Current, SK S9H 3X2, Canada
推荐引用方式
GB/T 7714		 Fan, Jianling,Luo, Ruyi,Liu, Deyan,et al. Stover retention rather than no-till decreases the global warming potential of rainfed continuous maize cropland[J]. FIELD CROPS RESEARCH,2018,219:14-23.
APA Fan, Jianling.,Luo, Ruyi.,Liu, Deyan.,Chen, Zengming.,Luo, Jiafa.,...&Ding, Weixin.(2018).Stover retention rather than no-till decreases the global warming potential of rainfed continuous maize cropland.FIELD CROPS RESEARCH,219,14-23.
MLA Fan, Jianling,et al."Stover retention rather than no-till decreases the global warming potential of rainfed continuous maize cropland".FIELD CROPS RESEARCH 219(2018):14-23.

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来源：地理科学与资源研究所

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