農場池へのフェンス設置による家畜のアクセス制限は一酸化二窒素とメタン排出を削減する
Fencing farm ponds to limit livestock access reduces nitrous oxide and methane emissions (原題)
Lukas Schuster, Omosalewa Odebiri, David B. Lindenmayer, Benjamin C. Scheele, David Smith, Martino E. Malerba
🤖 gxceed AI 要約
日本語
豪州南東部の54の農場池で16,773件のGHG測定を実施し、家畜排除がN2Oを44%、CH4を52%削減し、CO2換算で44%の排出削減につながることを示した。ただしCH4とN2Oの削減は連動せず、水質指標では排出変動を十分に説明できなかった。N2Oは質量では小さいが、温暖化係数の高さからCO2換算排出の76.7%を占める。
English
Using 16,773 hourly measurements from 54 farm ponds in southeastern Australia, this study shows that excluding livestock reduced N2O by 44% and CH4 by 52%, cutting total CO2-eq emissions by 44%. Reductions in the two gases were not consistently coupled, and water-quality metrics poorly explained variability. Despite small mass contributions, N2O accounted for 76.7% of CO2-eq emissions due to its high global warming potential.
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
日本では農業分野のGHG削減は主に水田メタンや家畜排せつ物管理が中心で、農場池はほとんど注目されていない。本研究成果は、農業由来の非CO2ガス削減策を検討する際の新たな視点を提供し、J-クレジットや環境保全型農業直接支払制度の対象拡大を議論する材料になり得る。
In the global GX context
This study adds to the growing body of evidence on agricultural non-CO2 greenhouse gas mitigation, which is relevant to global climate disclosure frameworks such as TCFD and ISSB that increasingly require Scope 3 land-sector emissions accounting. It highlights the importance of multi-gas assessment and context-dependent mitigation outcomes, informing nature-based solutions and agricultural carbon credit methodologies.
👥 読者別の含意
🔬研究者:農業生態系における非CO2ガス排出の管理介入効果を定量化した貴重なデータを提供し、多ガス同時評価の必要性を示す。
🏢実務担当者:農業サプライチェーンにおけるScope 3排出削減策として、家畜排除などの管理手法の有効性と限界を理解するのに役立つ。
🏛政策担当者:農業環境政策において、農場池の管理が気候緩和に寄与し得ることを示し、炭素クレジット制度や補助金設計の参考になる。
📄 Abstract（原文）
Farm ponds are globally abundant features in agricultural landscapes and are increasingly recognised as important sources of greenhouse gases. However, greenhouse gas assessments of these systems have largely focused on methane (CH 4 ), while nitrous oxide (N 2 O) emissions remain poorly understood. Furthermore, it remains unclear whether management interventions that reduce CH 4 emissions also reduce N 2 O emissions. Here, we quantified carbon dioxide (CO 2 ), CH 4 , and N 2 O fluxes from 54 fenced and unfenced farm ponds across 495 km in southeastern Australia, amounting to 16,773 hourly greenhouse gas measurements, to assess the effects of livestock exclusion on multi-gas emissions. Fenced ponds exhibited 44% lower N 2 O and 52% lower CH 4 emissions than unfenced ponds, resulting in 44% lower total CO 2 -eq emissions. In contrast, CO 2 fluxes did not differ between treatments. Reductions in CH 4 and N 2 O emissions were not consistently coupled across sites, with only 52% of sites showing concurrent reductions in both gases. Measured water-quality variables did not strongly explain greenhouse gas variability, suggesting that standard water-quality metrics alone may be insufficient to predict mitigation outcomes. Despite contributing little to total emissions in mass units, N 2 O accounted for more than three-quarters (76.7%) of total CO 2 -eq emissions owing to its high global warming potential. Together, our findings show that livestock exclusion can reduce CH 4 and N 2 O emissions from farm ponds, but mitigation outcomes are strongly context-dependent and cannot be inferred from single-gas responses alone.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.watres.2026.126814first seen 2026-09-18 04:37:36
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