Mechanisms of biochar decreasing methane emission from Chinese paddy soils
Abstract
Paddy fields are one of the largest anthropogenic sources of global CH₄ emission. A decrease in paddy CH₄ emission can contribute significantly towards the control of global warming. Recent studies have demonstrated that the application of biochar in paddy soils has such a capability, but its underlying mechanism has yet to be elucidated. In this investigation, we studied CH₄ emission, methanogenic archaeal, as well as methanotrophic proteobacterial communities, from microcosms derived from two paddy soils, Inceptisol and Ultisol. Both soils were amended with biochar at different pyrolysis temperatures (300 °C, 400 °C and 500 °C) at field condition. The soil CH₄ flux was monitored across whole rice season in 2010; the functional guilds communities were analyzed by PCR–DGGE and real-time quantitative PCR (qPCR). It is found that paddy CH₄ emissions significantly decreased under biochar amendments, which, interestingly, didn't result from the inhibition of methanogenic archaeal growth. qPCR further revealed that biochar amendments (1) increased methanotrophic proteobacterial abundances significantly, and (2) decreased the ratios of methanogenic to methanotrophic abundances greatly. These results shed insight on the underlying mechanism of how biochar decreases paddy CH₄ emission. This knowledge can be applied to develop a more effective greenhouse gas mitigation process for paddy fields.
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Rice paddies release CH4 at a higher rate as compared with upland soils.
“This is the reason why rice paddies release CH 4 at a higher rate as compared with upland soils (Feng et al. 2012).”
From Role of biochar toward carbon neutrality (2023) · cites this paper as Feng et al. 2012
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- Authors
- Feng, Y., Xu, Y., Yu, Y., Xie, Z., & Lin, X.
- Affiliations
- Chinese Academy of Sciences (CN)
- Corresponding author
- Xie, Zubin
- Lin, Xiangui
- Venue
- Soil Biology and Biochemistry
- Publisher
- Elsevier BV
- Published
- 2012-03
- Volume
- 46
- Pages
- 80-88
- ISSN
- 0038-0717 (ISSN-L)
- OpenAlex
- W2063384379
- Cited by
- 460
- References
- 2
- Citations by year
- 2026: 23 · 2025: 26 · 2024: 44 · 2023: 49 · 2022: 37 · 2021: 59 · 2020: 41 · 2019: 38 · 2018: 32 · 2017: 27 · 2016: 28 · 2015: 19 · 2014: 22 · 2013: 10 · 2012: 4
- FWCI
- 16.78
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soil Biology and Biochemistry (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Ecology › Peatlands and Wetlands Ecology
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
- Keywords
- biochar, methane emissions, paddy soil, methanogenic archaea, methanotrophic bacteria, Proteobacteria, pyrolysis temperature, greenhouse gas emissions reduction, rice cultivation, Inceptisol, Ultisol, microbial community composition
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