globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13737
Higher yields and lower methane emissions with new rice cultivars
Author: Jiang Y.; van Groenigen K.J.; Huang S.; Hungate B.A.; van Kessel C.; Hu S.; Zhang J.; Wu L.; Yan X.; Wang L.; Chen J.; Hang X.; Zhang Y.; Horwath W.R.; Ye R.; Linquist B.A.; Song Z.; Zheng C.; Deng A.; Zhang W.
Source Publication: Global Change Biology
ISSN: 13541013
Publishing Year: 2017
Language: 英语
Keyword: Meta-analysis ; Methanogenesis ; Methanotrophy ; Roots ; Soil carbon
English Abstract: Breeding high-yielding rice cultivars through increasing biomass is a key strategy to meet rising global food demands. Yet, increasing rice growth can stimulate methane (CH4) emissions, exacerbating global climate change, as rice cultivation is a major source of this powerful greenhouse gas. Here, we show in a series of experiments that high-yielding rice cultivars actually reduce CH4 emissions from typical paddy soils. Averaged across 33 rice cultivars, a biomass increase of 10% resulted in a 10.3% decrease in CH4 emissions in a soil with a high carbon (C) content. Compared to a low-yielding cultivar, a high-yielding cultivar significantly increased root porosity and the abundance of methane-consuming microorganisms, suggesting that the larger and more porous root systems of high-yielding cultivars facilitated CH4 oxidation by promoting O2 transport to soils. Our results were further supported by a meta-analysis, showing that high-yielding rice cultivars strongly decrease CH4 emissions from paddy soils with high organic C contents. Based on our results, increasing rice biomass by 10% could reduce annual CH4 emissions from Chinese rice agriculture by 7.1%. Our findings suggest that modern rice breeding strategies for high-yielding cultivars can substantially mitigate paddy CH4 emission in China and other rice growing regions. © 2017 John Wiley & Sons Ltd.
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被引频次[WOS]:23   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Institute of Applied Ecology Nanjing Agricultural University Nanjing China; Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology Ministry of Agriculture Beijing China; Geography, College of Life and Environmental Sciences University of Exeter Exeter UK; Department of Plant Sciences University of California Davis, CA USA; Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding Jiangxi Agricultural University Nanchang China; Center for Ecosystem Science and Society Northern Arizona University Flagstaff, AZ USA; Department of Plant Pathology North Carolina State University Raleigh, NC USA; Sustainable Soils and Grassland Systems Department Rothamsted Research Okehampton UK; Soil and Fertilizer and Resources and Environmental Institute Jiangxi Academy of Agricultural Science Nanchang China; Institute of Agricultural Resources and Environment Chongqing Academy of Agricultural Science Chongqing China; Department of Land, Air and Water Resources University of California Davis, CA USA; Plant and Environmental Sciences Clemson University Clemson, SC USA

Recommended Citation:
Jiang Y.,van Groenigen K.J.,Huang S.,et al. Higher yields and lower methane emissions with new rice cultivars[J]. Global Change Biology,2017-01-01
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