Sustained Green Manure-Rice Rotations Can Mitigate Methane Emissions by Enhancing Microbial Methane Oxidation in Southern China

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dc.creatorLiang, Hao
dc.creatorFu, Jin
dc.creatorZhou, Guopeng
dc.creatorFeng, Jiguang
dc.creatorZhu, Qiuan
dc.creatorSmith, Pete
dc.creatorGabrielle, Benoît
dc.creatorLi, Tao
dc.creatorSchmidt, Susanne
dc.creatorXu, Changxu
dc.creatorLiu, Jia
dc.creatorNie, Jun
dc.creatorWu, Ji
dc.creatorGeng, Mingjian
dc.creatorWang, Fei
dc.creatorLiang, Yuting
dc.creatorCao, Weidong
dc.creatorZhou, Feng
dc.date2025-07-28
dc.date2026-02-12T02:07:13Z
dc.date2026-02-12T02:07:13Z
dc.date.accessioned2026-06-27T04:15:54Z
dc.descriptionGreen manure (GM) enhances the ecological services in agricultural ecosystems, including soil health and carbon sequestration. However, its effect on regional methane (CH4) emissions from paddy fields is unclear. Here we clarify the impacts of GM rotation by combining process-based modeling with microbial gene abundance information and coordinated distributed observations at 14 sites in southern China. We found that GM management, including application rate and rotation year, mainly affects CH4 emissions in GM-rice systems by impacting soil biotic factors, which explain 78.4% of the variation (p < 0.001). The most influential factor is the ratio of soil CH4 production to oxidation gene abundances (R-2 = 0.510; p < 0.001), which decreases with GM rotation year due to increased activity of methane-oxidizing soil microbes (p < 0.001), indicating that CH4 emissions from GM-rice systems decrease with increased GM rotation year. By incorporating these microbial mechanisms as quantitative parameters in process-based model, we project that approximately 76% of the paddy rice areas in southern China, which have relatively low GM biomass and baseline CH4 emissions, can achieve reductions in CH4 emissions through nearly 15 years of GM crop rotation. This study indicates that CH4 emissions from GM-rice rotations with appropriate GM application rate over the long term will not significantly increase, resolving the contradictions in previous research.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/181457
dc.identifier.urihttp://hdl.handle.net/123456789/27029
dc.languageen
dc.publisherAdvancing Earth and Space Sciences (AGU)
dc.rightsOpen Access
dc.sourceLiang, Hao, Jin Fu, Guopeng Zhou, Jiguang Feng, Qiuan Zhu, Pete Smith, Benoît Gabrielle et al. Sustained green manure‐rice rotations can mitigate methane emissions by enhancing microbial methane oxidation in southern China. Earth's Future 13, no. 8 (2025): e2024EF005698.
dc.subjectgreen manures
dc.subjectrice
dc.subjectpaddy fields
dc.subjectcrop rotation
dc.subjectmethane
dc.subjectgreenhouse gas emissions
dc.subjectsoil microorganisms
dc.subjectcarbon sequestration
dc.subjectsoil management
dc.titleSustained Green Manure-Rice Rotations Can Mitigate Methane Emissions by Enhancing Microbial Methane Oxidation in Southern China
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)