Review: Enteric Methane Emissions Across Physiological Stages and Dietary NDF/NFC Ratios in Holstein Dairy Cattle—Implications for China’s Carbon Mitigation
ホルスタイン乳牛における生理段階とNDF/NFC比率に基づく腸内メタン排出のレビュー：中国の炭素削減への示唆 (AI 翻訳)
Peng Jia, Yan Tu, Naifeng Zhang, Naisheng Lu, Hulong Lei, Xueyuan Jiang, Qiyu Diao
🤖 gxceed AI 要約
日本語
本レビューは、中国のカーボンニュートラル目標に向け、ホルスタイン乳牛の腸内メタン排出量が生理段階（育成牛、泌乳牛、乾乳牛）や飼料中のNDF/NFC比によって変化することを解説。NDF/NFC比の増加は酢酸型発酵を促進し、メタン生産量・強度を高める。中国の乳牛における排出係数の精緻化と削減戦略に資する。
English
This review synthesizes research on enteric methane emissions from Holstein dairy cattle in China, emphasizing how emissions vary across physiological stages (heifers, lactating, dry cows) and with dietary NDF/NFC ratios. Higher NDF/NFC increases methane due to acetate-type ruminal fermentation. Provides theoretical support for accurate emission quantification and tailored mitigation strategies under China's carbon neutrality pledge.
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
日本の畜産分野でもメタン排出削減が課題であり、本レビューのNDF/NFC比と生理段階に応じた排出係数分析は、日本の排出インベントリ改善や飼料設計に応用可能。ただし直接データは中国産である点に留意。
In the global GX context
This paper adds to the global literature on enteric methane quantification, offering detailed data from China's Holstein population under different physiological and dietary conditions. The findings can inform Tier 2/3 emission factors for livestock GHG inventories and support mitigation strategies in dairy systems worldwide, though regional validation is needed.
👥 読者別の含意
🔬研究者:Provides a structured framework linking physiological stages and NDF/NFC ratios to methane emissions, useful for designing experiments or modeling emission factors.
🏢実務担当者:Dairy farm managers can use the insights to adjust feed composition (NDF/NFC ratio) to potentially reduce methane intensity per unit of milk.
🏛政策担当者:Supports the development of localized emission factors and mitigation policies for the dairy sector, aligning with national carbon neutrality goals.
📄 Abstract（原文）
Dairy cattle are a substantial contributor to global agricultural greenhouse gas emissions, primarily producing enteric methane through the ruminal anaerobic fermentation of dietary fiber. As China formally pledges to achieve carbon neutrality before 2060, accurately quantifying these emissions and developing localized mitigation strategies within the livestock sector has become a critical priority. Enteric methane emissions in dairy cattle are not a static physiological baseline; rather, they represent a highly dynamic phenotype profoundly influenced by an intricate network of physiological and environmental parameters. These include the animal’s age, anatomical and ruminal development, parity, lactation stage, and the precise stoichiometric balance of dietary carbohydrates. This review synthesizes extensive experimental data to construct a robust, scientifically logical framework elucidating the profound physiological mechanisms that govern apparent methane emission parameters. Accordingly, this paper reviews our recent research on methane emissions from Holstein dairy cattle across various ages and lactation stages, including heifers, lactating cows, and dry cows. Furthermore, it extensively evaluates the modulation of methanogenesis under diets with varying neutral detergent fiber to non-fibrous carbohydrate (NDF/NFC) ratios, demonstrating that an increased NDF/NFC ratio is positively correlated with higher enteric methane production, yield, and intensity due to the promotion of acetate-type ruminal fermentation. Ultimately, this review aims to provide robust theoretical support for the accurate quantification of enteric methane emissions and the formulation of precision mitigation strategies tailored to specific physiological states.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/ani16111684first seen 2026-06-03 05:07:32
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