Soil organic carbon regulates CH4 production through methanogenic evenness and available phosphorus under different straw managements

Methane (CH4) is the main greenhouse gas emitted from rice paddy fields driven by methanogens, for which methanogenic abundance on CH4 production has been intensively investigated. However, information is limited about the relationship between methanogenic diversity (e.g., richness and evenness) and...

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Bibliographic Details
Published in:Journal of environmental management 2023-02, Vol.328, p.116990-116990, Article 116990
Main Authors: Kan, Zheng-Rong, Wang, Zirui, Chen, Wei, Virk, Ahmad Latif, Li, Feng-Min, Liu, Jian, Xue, Yaguang, Yang, Haishui
Format: Article
Language:English
Subjects:
Available phosphorus
Methane
Methanogenic evenness
Soil organic carbon
Straw managements
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Summary:Methane (CH4) is the main greenhouse gas emitted from rice paddy fields driven by methanogens, for which methanogenic abundance on CH4 production has been intensively investigated. However, information is limited about the relationship between methanogenic diversity (e.g., richness and evenness) and CH4 production. Three independent field experiments with different straw managements including returning method, burial depth, and burial amount were used to identify the effects of methanogenic diversity on CH4 production, and its regulating factors from soil properties in a rice–wheat cropping system. The results showed that methanogenic evenness (dominance) can explain 23% of variations in CH4 production potential. CH4 production potential was positively related to methanogenic evenness (R2 = 0.310, p 
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2022.116990