Reducing enteric methane in northern Australian grazing systems – a synthesis of the role for tropical legumes
北部オーストラリアの放牧システムにおける腸内メタン削減 – 熱帯マメ科植物の役割に関する統合 (AI 翻訳)
Elaine Mitchell, Beverley Henry, Gavin Arthur Peck, Ed Charmley, Peter Grace, Richard Eckard
🤖 gxceed AI 要約
日本語
本レビューは、北部オーストラリアの放牧システムにおける熱帯マメ科植物による腸内メタン削減のエビデンスを統合。in vitroおよびin vivo研究では、メタン収量が平均12～14%減少し、マメ科植物の配合率が主要な予測因子であることが示された。生産システムモデリングでは、排出原単位が平均28%削減され、その大部分は生産性向上による。Leucaenaが直接抑制に優れ、DesmanthusやStylosanthesは適応性が広く、ポートフォリオの重要性が示唆された。
English
This review synthesizes evidence on enteric methane reduction from tropical legumes in northern Australian grazing systems. In vitro and in vivo studies show average 12-14% reduction in methane yield, with legume inclusion rate as key predictor. Production-system modeling indicates 28% reduction in emissions intensity, mostly from productivity gains. The study identifies Leucaena as top for direct suppression, while Desmanthus and Stylosanthes offer broader adaptability, suggesting a portfolio approach.
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
日本の畜産もメタン排出源だが、粗放的な放牧システムは異なる。しかし、マメ科植物の利用は日本の酪農・肉牛生産にも応用可能性があり、飼料添加物以外の対策として示唆に富む。
In the global GX context
Globally, enteric methane is a major GHG source. This paper shows that tropical legumes are a viable mitigation strategy in extensive systems where feed additives are impractical, supporting nature-based solutions in agricultural climate policies.
👥 読者別の含意
🔬研究者:This synthesis provides a quantitative basis for prioritizing legume species for methane abatement and links in vitro results to farm-scale modeling.
🏢実務担当者:For graziers, incorporating legumes like Leucaena or Desmanthus can reduce emissions intensity by 28%, but adoption depends on overcoming establishment challenges.
🏛政策担当者:The paper highlights that legume integration is a cost-effective mitigation option for northern Australian grazing, but policy support for research and extension is needed.
📄 Abstract（原文）
Enteric methane (CH4) emissions from ruminant livestock are a major source of greenhouse gases in northern Australian grazing systems, where the extensive, low-input nature of production limits the applicability of alternative mitigation strategies such as feed additives. Tropical forage legumes therefore represent one of the few practical abatement options available, offering mitigation through both direct suppression of rumen methanogenesis and indirect improvements in animal productivity. This review synthesises evidence from in vitro, in vivo and farm-scale studies and integrates these findings with production-system modelling and agronomic assessments to evaluate CH4 abatement potential under extensive grazing conditions. In vitro studies demonstrated an average 12.1% reduction in CH4 yield across tropical legume species, while in vivo studies reported a comparable mean reduction of 13.8%. Legume inclusion rate (% of dietary dry matter) emerged as the primary predictor of CH4 response. Production-system modelling across low-, medium- and high-productivity grazing systems showed that legume incorporation reduced emissions intensity by an average of 28%, with approximately 82% of the reduction attributable to productivity gains and 18% to direct suppression of enteric CH4. A multi-criteria prioritisation framework combining CH4 abatement potential with agronomic suitability identified a small number of high-potential species. Leucaena leucocephala consistently produced the greatest direct CH4 suppression, whereas Desmanthus and Stylosanthes spp. offered broader environmental adaptation and greater scalability despite more modest direct abatement. These findings suggest that effective CH4 mitigation in northern Australian grazing systems will require a portfolio of legumes tailored to regional conditions. Tropical legumes are an immediately deployable mitigation strategy, although their full potential will depend on overcoming constraints to establishment, persistence and adoption in commercial grazing systems.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1071/cp25175first seen 2026-07-16 05:07:25
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