今天,奶农的主要挑战之一是减少他们的环境足迹,高效,和可持续生产系统。酵母益生菌等饲料添加剂可能会通过改善牛奶产量来实现这些目标。饲料效率,和配给的价值,从而减轻牛奶生产对环境的影响。在这项研究中,在三个不同国家进行的三个试验中,进行了生命周期评估(LCA)原则,以估计生产和补充商业酵母益生菌(ActisafSc47)对环境的影响,这些试验代表了欧洲约50%的牛奶产量:法国(法国试验),英国(英国审判),和德国(德国审判)。每次审判,两组动物进行了比较:对照组,不补充ActisafSc47,用作基线;和实验,以5或10克/牛/天的速度补充ActisafSc47。对每个组分析不同的影响类别,以计算生产Ikg脂肪和蛋白质校正的牛奶的影响。初步分析仅在补充ActisafSc47期间进行,并显示补充ActisafSc47减少,平均5%,三次试验中的碳足迹。第二个分析是通过将每个试验的所有数据外推到年度农场水平来进行的,包括哺乳期(305天),干旱期(60天),以及有和没有补充ActisafSc47的时期。以农场的年度规模报告,补充ActisafSc47所允许的平均减少量为碳足迹的2.9、2.05、2.47、1.67、2.28、2.18、2.14和2.28%,土地利用,用水,资源使用,酸化,淡水富营养化,海洋富营养化,和陆地富营养化,分别。平均而言,与对照相比,使用ActisafSc47生产1公斤脂肪和蛋白质校正牛奶可改善环境影响。关于ActisafSc47的生产,LCA表明,生产1kg的ActisafSc47排放2.1kgCO2eq,对牛奶总碳足迹的贡献可忽略不计,范围为0.005至0.016%。在奶牛中使用ActisafSc47可能会产生不同的积极结果:提高性能和效率,同时减少全球碳足迹。
Today, one of the major challenges of dairy farmers is to reduce their environmental footprint to establish more effective, efficient, and sustainable production systems. Feed additives such as yeast probiotics could potentially allow them to achieve these objectives through the improvement of milk production, feed efficiency, and ration valorization, hence mitigating the environmental impacts of milk production. In this study, the life cycle assessment (LCA) principle was performed to estimate the environmental impact of the production and supplementation of a commercial yeast probiotic (Actisaf Sc 47) in three trials performed in three different countries that are representative for around 50% of the milk production in Europe: France (French trial), United Kingdom (UK trial), and Germany (German trial). For each trial, two groups of animals were compared: control, without Actisaf Sc 47 supplementation, used as baseline; and experimental, with Actisaf Sc 47 supplementation at 5 or 10 g/cow/day. Different impact categories were analyzed for each group to calculate the impact of producing 1 kg of fat- and protein-corrected milk. An initial analysis was done only during the period of Actisaf Sc 47 supplementation and showed than the supplementation with Actisaf Sc 47 reduced, on average by 5%, the carbon footprint during the three trials. A second analysis was done via the extrapolation of all the data of each trial to an annual farm level, including the lactation period (305 days), dry period (60 days), and the period with and without Actisaf Sc 47 supplementation. Reported at a farm annual scale, the average reduction allowed by Actisaf Sc 47 supplementation was 2.9, 2.05, 2.47, 1.67, 2.28, 2.18, 2.14, and 2.28% of the carbon footprint, land use, water use, resource use, acidification, freshwater eutrophication, marine eutrophication, and terrestrial eutrophication, respectively. On average, the production of 1 kg of fat- and protein-corrected milk by using Actisaf Sc 47 was shown to improve environmental impacts compared to control. Regarding Actisaf Sc 47 production, the LCA showed that the production of 1 kg of Actisaf Sc 47 emitted 2.1 kg CO2 eq with a negligible contribution to total the carbon footprint of milk ranging from 0.005 to 0.016%. The use of Actisaf Sc 47 in dairy cows could then result in different positive outcomes: improving performance and efficiency while reducing the global carbon footprint.