Methane oxidation activity inhibition via high amount aged biochar application in paddy soil
Abstract
Fresh biochar application has been recommended as an effective strategy to mitigate methane emissions from paddy soil due to its role in promoting potential methane oxidation (PMO). However, little is known about the effect of biochar on PMO after long-term aging. Here, a laboratory incubation experiment was performed to gain insight into the combined effects of biochar characteristics on soil PMO during the biochar aging process. Biochar samples aged with an HNO 3/H 2 SO 4 mixture (1:3) were prepared and added at 22.5 and 2.8 t ha-1 to paddy soil. Mixed acid with a dilution of 10- 40% indicated the aging process in paddy field properly. Smaller biochar particles, smoother surface, higher surface area and porosity were observed with the increase of mixed acid ratio. Carboxylic functional groups (COOR) on biochar surface increased accompanied with biochar aging process. Aged biochar application at 22.5 t ha-1 inhibited paddy soil PMO, which mainly caused from the increased COOR groups induced NH 4+-N inhibition for PMO. Increased soil NH 4+-N inhibited PMO by limiting the growth of methanotrophs and nitrifiers due to decreased soil pH. In contrast, 2.8 t aged biochar ha-1 application showed no significant difference on PMO compared with control. Our results indicated that aged biochar exerted in paddy soil have limited effect on mitigating methane emissions from paddy soil in the long term.
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A faded liming effect, a gradual decrease of labile organic carbon content, as well as a slow improvement of soil aggregation and aeration are all potential influencing factors.
“A faded liming effect, a gradual decrease of labile organic carbon content, as well as a slow improvement of soil aggregation and aeration are all potential influencing factors (Nan et al. 2021a; Nan et al. 2021b).”
From Role of biochar toward carbon neutrality (2023) · cites this paper as Nan et al. 2021a
Cites
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Role of biochar toward carbon neutrality
Wang, L., Deng, J., Yang, X., Hou, R., & Hou, D. (2023) · Carbon Research · doi:10.1007/s44246-023-00035-7 · Cited by 195 · see citing works
- Authors
- Nan, Q., Hu, S., Qin, Y., & Wu, W.
- Affiliations
- Zhejiang University (CN)
- Corresponding author
- Qin, Yong
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2021-11
- Volume
- 796
- Pages
- 149050
- ISSN
- 0048-9697 (ISSN-L)
- OpenAlex
- W3180332239
- Cited by
- 42
- References
- 6
- Citations by year
- 2026: 4 · 2025: 11 · 2024: 8 · 2023: 11 · 2022: 6 · 2021: 1
- FWCI
- 3.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- The Science of The Total Environment (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Key Research and Development Program of China
- National Natural Science Foundation of China (41571241, 42077032)
- Ministry of Science and Technology of the People's Republic of China (2015BAC02B01)
- 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 aging, methane oxidation, paddy soil, methane mitigation, methanotrophic bacteria, nitrifying bacteria, carboxylic acid functional groups, soil pH, biochar particle size, surface area and porosity, acid leaching
- MeSH terms
- Charcoal, Methane, Oryza, Soil
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Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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