Increasingly countries are seeking to reduce emission of greenhouse gases from the agricultural industries, and livestock production in particular, as part of their climate change management. While many reviews update progress in mitigation research, a quantitative assessment of the efficacy and performance-consequences of nutritional strategies to mitigate enteric methane (CH₄) emissions from ruminants has been lacking. A meta-analysis was conducted based on 108 refereed papers from recent animal studies (2000–2020) to report effects on CH₄ production, CH₄ yield and CH₄ emission intensity from 8 dietary interventions. The interventions (oils, microalgae, nitrate, ionophores, protozoal control, phytochemicals, essential oils and 3-nitrooxypropanol). Of these, macroalgae and 3-nitrooxypropanol showed greatest efficacy in reducing CH₄ yield (g CH₄/kg of dry matter intake) at the doses trialled. The confidence intervals derived for the mitigation efficacies could be applied to estimate the potential to reduce national livestock emissions through the implementation of these dietary interventions.

越来越多的国家正在寻求减少农业，特别是畜牧业生产的温室气体排放，作为其气候变化管理的一部分。虽然许多评论更新了缓解研究的进展，但缺乏对缓解反刍动物肠道甲烷 (CH ₄ ) 排放的营养策略的功效和性能后果的定量评估。基于最近动物研究（2000-2020 年）的 108 篇参考论文进行了荟萃分析，以报告对 CH ₄产量、CH ₄产量和 CH _{4 的影响}8 种饮食干预措施的排放强度。干预措施（油、微藻、硝酸盐、离子载体、原生动物控制、植物化学物质、精油和 3-硝基氧基丙醇）。其中，大型藻类和3-硝基氧基丙醇在试验剂量下在降低CH ₄产量（g CH ₄ /kg干物质摄入量）方面表现出最大功效。为缓解效果推导出的置信区间可用于估计通过实施这些饮食干预减少国家牲畜排放的潜力。