Considering greenhouse gas emissions from feed production in diet formulation for dairy cows as a means of reducing the carbon footprint

IF 4 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Pub Date : 2025-05-16 DOI:10.1016/j.animal.2025.101544

M. Managos , C. Lindahl , S. Agenäs , U. Sonesson , M. Lindberg

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引用次数: 0

Abstract

Dairy production often faces conflicting goals, such as reducing greenhouse gas emissions, increasing food production and achieving self-sufficiency without transgressing planetary boundaries. This study examined ways to decrease emissions intensity per kg of milk from high-producing cows by selecting feed ingredients with a low carbon footprint while also considering local alternatives. Diets comprising of grass-legume mixture silage and three concentrate mixtures (standard commercial, based on by-products, and domestic crops grown on-farm) were randomly allotted to three groups of high-producing Swedish Holstein cows (N = 48). Over 7 weeks, no differences were observed (mean ± SEM) in feed DM intake (commercial: 24.3, by-products: 24.7, domestic: 24.2 kg/day, ± 0.51 kg/day), energy-corrected milk (ECM) yield (commercial: 38.3, by-products: 38.5, domestic: 37.8, ± 0.98 kg/day) or enteric methane production (commercial: 387, by-products: 378, domestic: 402 g/day, ± 17.3 g/day) among the diets. However, an evaluation of the primary carbon footprint of feed production (excluding transportation emissions) showed that the by-products and domestic diets gave lower emissions than the commercial diet, 9.4, 10.2, and 11.9 Feed CO₂ equivalents (CO_2-eq) kg/day, respectively (SEM: ± 0.38 Feed CO_2-eq kg/day). The emission intensity, expressed as feed emissions per kilogram of ECM yield, showed that the by-product-based and domestic diets generated lower carbon footprints, with emissions of 254 and 284 g Feed CO_2-eq/kg ECM, respectively, in comparison to 320 g Feed CO_2-eq/kg ECM observed for the commercial diet (SEM: ± 10.7 g Feed CO_2-eq/kg ECM). Considering greenhouse gas emissions from feed production in diet formulation resulted in a lower overall feed carbon footprint and lower emission intensity per ECM. These findings can assist in formulating dairy rations for high-yielding dairy cows that balance conflicting goals while maintaining productivity.

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考虑将奶牛日粮配方中饲料生产产生的温室气体排放作为减少碳足迹的一种手段

乳制品生产往往面临着相互矛盾的目标，例如减少温室气体排放、增加粮食产量和在不超越地球边界的情况下实现自给自足。本研究探讨了通过选择低碳足迹的饲料成分，同时考虑当地替代品，降低高产奶牛每公斤牛奶排放强度的方法。饲粮包括草-豆科混合青贮和3种浓缩混合物（标准商品、基于副产品和农场种植的国内作物），随机分配给三组高产瑞典荷斯坦奶牛（N = 48）。7周后，不同饲粮的干物质采食量（商品：24.3，副产物：24.7，家用：24.2 kg/天，±0.51 kg/天）、能量校正乳产量（商品：38.3，副产物：38.5，家用：37.8，±0.98 kg/天）和肠道甲烷产量（商品：387，副产物：378，家用：402 g/天，±17.3 g/天）均无显著差异（平均值±SEM）。然而，对饲料生产的初级碳足迹（不包括运输排放）的评估表明，副产品和家养饲粮的碳排放量低于商品饲粮，分别为9.4、10.2和11.9饲料二氧化碳当量（CO2-eq） kg/d （SEM：±0.38饲料二氧化碳当量kg/d）。排放强度（以每千克ECM产量的饲料排放量表示）表明，以副产品为基础的饲粮和家养饲粮产生的碳足迹较低，分别为254和284 g饲料二氧化碳当量/kg ECM，而商业饲粮（SEM：±10.7 g饲料二氧化碳当量/kg ECM）的碳足迹为320 g饲料二氧化碳当量/kg ECM。在日粮配方中考虑饲料生产产生的温室气体排放，降低了饲料总体碳足迹和每ECM的排放强度。这些发现有助于制定高产奶牛的日粮，在保持生产力的同时平衡相互冲突的目标。

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来源期刊

Animal 农林科学-奶制品与动物科学

CiteScore

7.50

自引率

2.80%

发文量

246

审稿时长

3 months

期刊介绍： Editorial board animal attracts the best research in animal biology and animal systems from across the spectrum of the agricultural, biomedical, and environmental sciences. It is the central element in an exciting collaboration between the British Society of Animal Science (BSAS), Institut National de la Recherche Agronomique (INRA) and the European Federation of Animal Science (EAAP) and represents a merging of three scientific journals: Animal Science; Animal Research; Reproduction, Nutrition, Development. animal publishes original cutting-edge research, ''hot'' topics and horizon-scanning reviews on animal-related aspects of the life sciences at the molecular, cellular, organ, whole animal and production system levels. The main subject areas include: breeding and genetics; nutrition; physiology and functional biology of systems; behaviour, health and welfare; farming systems, environmental impact and climate change; product quality, human health and well-being. Animal models and papers dealing with the integration of research between these topics and their impact on the environment and people are particularly welcome.