放牧肉牛とメタン排出のグローバルレビュー：適切な政策と管理に資する同時的な家畜・土壌サンプリングの必要性
Global Review of Grazing Beef Cattle and Methane Emissions: More Simultaneous Animal and Soil Sampling Needed to Inform Appropriate Policy and Management (原題)
Nicole M. Nimlos, Christopher Bastian, Linda van Diepen, Timm M. Gergeni, John Derek Scasta
🤖 gxceed AI 要約
日本語
世界82件の査読研究を統合し、放牧肉牛の腸内メタン排出量が平均184g/頭/日であることを示した。排出量は牛のタイプや体重、地域、測定手法で大きく変動するが、品種や種、飼料では差が見られなかった。土壌炭素隔離を同時評価した研究はわずか2件（3%未満）であり、純炭素収支評価には家畜・土壌・管理を統合した研究が不可欠だと結論づける。
English
A synthesis of 82 peer-reviewed studies found grazing beef cattle emit on average 184 g CH4/animal/day, varying by cattle type, body weight, location, and measurement tool but not by breed, species, diet, or season. Only 2 studies (<3%) simultaneously assessed soil carbon sequestration. The authors call for integrated research linking grazing management, animal emissions, and soil carbon to inform policy and net carbon balance.
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
日本では畜産由来メタンはScope3・GHGインベントリの一部だが、放牧主体の肉牛は国内では限定的。土壌炭素隔離と家畜排出の同時評価という視点は、農林業のカーボンクレジットやJ-クレジット制度の議論に示唆を与える。
In the global GX context
While the paper is not directly about disclosure frameworks, it highlights a critical gap in agricultural GHG accounting that affects Scope 3 and national inventories. The call for integrated soil-animal carbon measurement aligns with emerging ISSB/SBTi guidance on land-sector emissions and nature-related disclosures.
👥 読者別の含意
🔬研究者:放牧牛メタン排出の全球パターンと土壌炭素隔離研究の不足を定量的に示した基礎的レビュー。
🏢実務担当者:畜産サプライチェーンのScope3算定において、土壌炭素と家畜排出を統合的に扱う必要性を認識する材料。
🏛政策担当者:畜産メタン削減政策や炭素税設計において、土壌炭素隔離を同時評価する研究基盤の整備が急務であることを示唆。
📄 Abstract（原文）
There are increasing concerns about enteric methane (CH 4 ) emissions from beef cattle. These animals spend most of their lives grazing, a phase responsible for the majority of their CH 4 emissions. Despite this, emissions from grazing beef cattle have not been well documented. Recent efforts have explored various CH 4 mitigation strategies, including dietary changes, genetic selection, and taxation. However, the potential role of soil carbon sequestration as a simultaneous strategy to offset these carbon emissions has been less explored. To address these gaps, a quantitative synthesis characterizing patterns in enteric CH 4 emissions from grazing beef cattle was conducted and assessed whether studies considered soil carbon sequestration as a potential strategy to offset these carbon emissions. It was found that 82 peer‐reviewed published studies have measured enteric CH 4 emissions from grazing beef cattle globally. On average, grazing beef cattle emitted 184 g of CH 4 per animal per day. Emissions varied significantly by cattle type (bull, cow, heifer, or steer), initial body weight, location of study, and the CH 4 measurement tool used, but not by breed, cattle species ( Bos taurus versus Bos indicus ), diet, or grazing season. Only two of the 82 studies (<3%) in the dataset simultaneously assessed soil carbon sequestration. In order to fully evaluate the net carbon balance between beef cattle and grazinglands, more research is necessary that simultaneously quantifies grazing management, animal emissions, and soil carbon sequestration. Such interdisciplinary investigations will allow us to more confidently develop policy and management strategies that integrate full ecosystem processes and dynamics.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/jag2.70098first seen 2026-10-16 04:45:39
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