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Stover retention rather than no-till decreases the global warming potential of rainfed continuous maize cropland
Fan, Jianling1; Luo, Ruyi1; Liu, Deyan1; Chen, Zengming1; Luo, Jiafa2; Boland, Nanthi3; Tang, Jianwu4; Hao, Mingde5; McConkey, Brian6; Ding, Weixin1
2018-04-15
Source PublicationFIELD CROPS RESEARCH
ISSN0378-4290
Volume219Pages:14-23
Corresponding AuthorFan, Jianling(jlfan@issas.ac.cn) ; Ding, Weixin(wxding@issas.ac.cn)
AbstractDuring 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.
KeywordStover retention No-till Nitrous oxide Soil organic carbon Global warming potential
DOI10.1016/j.fcr.2018.01.023
WOS KeywordNITROUS-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
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China[2014CB954002] ; Chinese Academy of Sciences[XDB15020100]
Funding OrganizationNational Basic Research Program of China ; Chinese Academy of Sciences
WOS Research AreaAgriculture
WOS SubjectAgronomy
WOS IDWOS:000428007800002
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/60274
Collection中国科学院地理科学与资源研究所
Corresponding AuthorFan, Jianling; Ding, Weixin
Affiliation1.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
Recommended Citation
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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