有機資材の品質が還元的土壌消毒中の温室効果ガストレードオフと短期的炭素保持を制御する
Organic Amendment Quality Regulates Greenhouse Gas Trade-Offs and Short-Term Carbon Retention During Reductive Soil Disinfestation (原題)
Shanju Wen, Shijuan Xiong, Weimo Wu, Jinhu Zhi, Weiyang Liu, ChunMing Chi, Lu Kang, Xiaohong Tian
🤖 gxceed AI 要約
日本語
本研究は、30日間の嫌気培養実験で、有機資材（麦わらとキウイ枝）の品質が還元的土壌消毒中の温室効果ガスフラックスと炭素動態に与える影響を調べた。両資材はCO2とCH4の発生を促進し、N2O排出を85%以上抑制したが、CH4が地球温暖化係数の99%以上を占めた。麦わらは炭素隔離効率が高い一方でメタン排出が多く、キウイ枝は気候フットプリントが小さいことが示された。
English
This study examined how organic amendment quality (wheat straw vs. kiwifruit branches) affects greenhouse gas fluxes and carbon dynamics during reductive soil disinfestation in a 30-day anaerobic incubation. Both amendments stimulated CO2 and CH4 while suppressing N2O by over 85%, with CH4 dominating global warming potential. Wheat straw favored carbon sequestration but increased methane emissions, whereas kiwifruit branches had a lower net climate impact.
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
日本の農業分野では、土壌消毒の代替技術としてRSDが注目されるが、GHG排出削減と炭素貯留の両立は政策課題。本研究成果は、有機資材選定の指針を提供し、農業由来のメタン排出削減や炭素貯留策に示唆を与える。
In the global GX context
Globally, this research contributes to understanding trade-offs in agricultural GHG mitigation and carbon sequestration, relevant to climate-smart agriculture and national GHG inventories. It provides empirical data on organic amendment choices that could inform sustainable soil management practices and climate policy.
👥 読者別の含意
🔬研究者:農業分野のGHG排出と炭素貯留のトレードオフに関する実証データを提供し、土壌管理研究に示唆を与える。
🏢実務担当者:農業生産者や土壌管理企業は、有機資材選定によるGHG排出削減と炭素貯留のバランスを考慮する際の参考にできる。
🏛政策担当者:農業部門の温室効果ガス排出削減策や炭素貯留促進政策の設計に有用な知見を提供する。
📄 Abstract（原文）
Background/Objectives: Reductive soil disinfestation (RSD) is increasingly viewed as a viable alternative to chemical fumigation, yet the role of organic amendment quality in regulating greenhouse gas (GHG) fluxes, soil organic carbon (SOC) dynamics, and net climate forcing remains poorly understood. Methodology: In a 30-day anaerobic incubation experiment, we set up three treatments—a flooded control (CK), soil amended with wheat straw (WS, C/N = 55.5), and soil amended with kiwifruit branches (KB, C/N = 110.8)—each replicated three times under identical conditions. Results: Both WS and KB additions strongly stimulated CO2 and CH4 production, while suppressing N2O emissions by over 85% relative to CK. The WS treatment exhibited a substantially higher global warming potential (GWP, 823.52 t ha−1) than KB (636.23 t ha−1), with CH4 accounting for more than 99% of total GWP. Although WS surpassed KB in short-term carbon sequestration efficiency (25.79% vs. 20.11%) and showed greater hydrolytic enzyme activities (βG, CBH, and XYL), the two organic amendments diverged clearly in carbon fraction distribution: Cmic was 17.9% higher under WS, whereas Cmin was 16.2% higher under KB. When factoring in the CO2 equivalent benefit derived from carbon sequestration, the net GWP (NGWP) indicated that both RSD treatments remained net GHG sources. Notably, KB yielded a markedly lower NGWP (611.60 t CO2-eq ha−1) than WS (798.19 t CO2-eq ha−1), highlighting a fundamental trade-off: WS favored rapid SOC accumulation at the expense of elevated methane emissions, whereas KB achieved a smaller climatic footprint despite more moderate carbon retention. Conclusions: These findings underscore that selecting organic amendments for field RSD requires balancing the competing goals of carbon sequestration and GHG mitigation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/metabo16090653first seen 2026-09-09 04:56:36
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