Salah Nizar, Legendre Héloïse, Paiva Erika, Duclos Julie, Briche Maxime, Maaoui Mariem, Scholten Jasper, Garat Boute Céline
Phileo by Lesaffre, 59520 Marquette-lez-Lille, France.
Blonk Sustainability Tools, Groen van Prinsterersingel 45, 2805 TD Gouda, The Netherlands.
Animals (Basel). 2024 Jul 29;14(15):2202. doi: 10.3390/ani14152202.
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 CO 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.
如今，奶农面临的主要挑战之一是减少其环境足迹，以建立更有效、高效和可持续的生产系统。酵母益生菌等饲料添加剂有可能通过提高牛奶产量、饲料效率和日粮价值来帮助他们实现这些目标，从而减轻牛奶生产对环境的影响。在本研究中，采用生命周期评估（LCA）原则，在三个不同国家进行的三项试验中，评估了一种商业酵母益生菌（Actisaf Sc 47）的生产和添加对环境的影响，这三个国家约占欧洲牛奶产量的50%：法国（法国试验）、英国（英国试验）和德国（德国试验）。对于每项试验，比较了两组动物：对照组，不添加Actisaf Sc 47，作为基线；实验组，每天每头奶牛添加5或10克Actisaf Sc 47。分析了每组的不同影响类别，以计算生产1千克脂肪和蛋白质校正乳的影响。仅在Actisaf Sc 47添加期间进行了初步分析，结果表明，在三项试验中，添加Actisaf Sc 47平均减少了5%的碳足迹。通过将每项试验的所有数据外推到农场年度水平进行了第二次分析，包括泌乳期（305天）、干奶期（60天）以及添加和不添加Actisaf Sc 47的时期。以农场年度规模报告，Actisaf Sc 47添加带来的平均减少量分别为碳足迹、土地使用、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的2.9%、2.05%、2.47%、1.67%、2.28%、2.18%、2.14%和2.28%。平均而言，与对照组相比，使用Actisaf Sc 47生产1千克脂肪和蛋白质校正乳对环境影响有改善。关于Actisaf Sc 47的生产，生命周期评估表明，生产1千克Actisaf Sc 47排放2.1千克二氧化碳当量，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Actisaf Sc 47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。
