Geochemical weathering and microbial carbon turnover: coupled drivers of greenhouse gas mitigation in basalt-amended paddy soil
玄武岩を添加した水田土壌における地球化学的風化と微生物炭素循環：温室効果ガス削減の複合的な駆動要因 (AI 翻訳)
Ji-Hyun Park, Mu Yeol Lee, So-Jeong Kim, Chan-Mi Choi, Young-Soo Han
🤖 gxceed AI 要約
日本語
本研究は、玄武岩粉末を添加した水田土壌における温室効果ガス（CO2、CH4）排出削減メカニズムを、地球化学的風化と微生物プロセスの両面から解明した。実験の結果、玄武岩濃度が高いほどガス排出が減少し、ケイ素、カルシウム、マグネシウムなどの陽イオン放出が炭素の無機トラップに寄与すること、また微生物群集の変化（特にMethanobacteriumの減少）がメタン生成を抑制することを示した。玄武岩施用は水田以外の土壌タイプにも応用可能な緩和策である。
English
This study investigates the mitigation of greenhouse gas emissions (CO2 and CH4) from paddy soil through basalt amendment, focusing on both geochemical weathering and microbial processes. Results show that higher basalt concentrations reduce gas emissions via cation release (Si, Ca, Mg) for inorganic carbon trapping and suppression of methanogens like Methanobacterium. Basalt application is suggested as a potential mitigation strategy applicable to various soil types.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の水田は主要なメタン発生源であり、本研究成果は国内の農業由来GHG削減策として玄武岩施用の有効性を示す。ただし、実用化には土壌タイプや長期影響の検証が必要であり、今後の政策連動やJ-クレジット制度への応用可能性が期待される。
In the global GX context
Globally, paddy soils are a major source of CH4 emissions, and this study provides empirical evidence for basalt-enhanced weathering as a carbon dioxide removal (CDR) strategy. It contributes to the discourse on soil carbon sequestration and nature-based solutions, with implications for agricultural climate mitigation policies and potential integration into carbon crediting schemes.
👥 読者別の含意
🔬研究者:Provides mechanistic insight into coupled abiotic and biotic greenhouse gas mitigation in soils, relevant for carbon cycle modeling and enhanced weathering research.
📄 Abstract（原文）
Abstract Increasing agricultural cultivation is a major contributor to greenhouse gas emissions worldwide. Recently, the application of silicate minerals, such as basalt, has gained attention as a strategy to mitigate greenhouse gas emissions from paddy soils. These minerals can enhance carbon sequestration through weathering reactions that consume atmospheric CO 2 as they dissolve. This study investigates not only the weathering effects but also how basalt treatment influences microbial processes in paddy soils, ultimately affecting emissions of carbon dioxide (CO 2 ) and methane (CH 4 ). With different concentrations of basalt powder, biotic and abiotic batch systems were constructed and gas emissions, cation dissolution, carbon turnover, and microbial communities were investigated. Microbial respiration led to an increase in CO 2 and CH 4 emissions, however, the gas emissions decreased with higher basalt concentrations. The release of cations such as Si, Ca, and Mg also had a potential role in reducing gas emissions through inorganic carbon trapping. Moreover, the lower dissolved organic carbon (DOC) concentrations were measured under all of the batches, demonstrating the effects of microorganisms. By calculating the turnover of solid organic carbon (SOC) across gas, aqueous, and solid phases, the role of microorganisms in carbon flow was confirmed. Microbial community analysis showed that Methanobacterium decreased in proportion with increasing basalt content. It might be attributed to the thermodynamic suppression imposed by basalt-derived electron acceptors. These results indicate that basalt application can effectively reduce microbial greenhouse gas emissions and could potentially be applied to a variety of soil types beyond just paddy fields.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1186/s13765-026-01106-0first seen 2026-06-24 05:48:00
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