摘要
ABSTRACTBeef meat, one of the more environmentally costly animal-based foods, can be produced in two general ways, as the main product on specialised farms or as a co-product on dairy farms. In this study, two cases (a semi-confinement dairy farm (A) and a pasture-based dairy farm (B)) have been analysed by means of LCA to evaluate the environmental impacts associated with the coproduction of beef meat. In both cases, purchased feed production was found to be the main cause of environmental impacts in most of the categories considered. Additionally, cow emissions to air were the main contributor for the global warming category. Comparing the two dairy systems, notably lower environmental impacts were obtained for B in 13 of the 18 categories analysed. Regarding CF, 8.10 and 8.88 kg CO2eq/kg LW were obtained for A and B, respectively. These CF values were within the wide range found in the literature for beef meat (1.2–42.6 kg CO2eq/kg LW). Beef calves and cull cows are an important output of dairy farming, so that coproduction enables milk and meat with lower CF and associated environmental impacts to be obtained. In addition, the variability of the data found in literature and the lack of LCA studies based on real data for beef meat coproduced on dairy farms evidence the importance of in-depth study of this interesting topic.
摘要译文
Abstractbeef肉是一种更具环境成本的基于动物的食物之一，可以通过两种一般方式生产，作为专业农场的主要产品，也可以作为奶牛场的副产品。在这项研究中，已经通过LCA分析了两种病例（半成熟的奶牛场（A）和基于牧场的奶牛场（B）），以评估与牛肉肉类共同生产有关的环境影响。在这两种情况下，发现购买的饲料生产都是大多数考虑的类别中环境影响的主要原因。此外，对空中的牛排放是全球变暖类别的主要贡献者。比较了两个乳制品系统，在分析的18个类别中的13个中，B获得了较低的环境影响。关于CF，分别为A和B获得了8.10和8.88千克CO 2 EQ/kg LW。这些CF值在牛肉肉（1.2-42.6千克CO 2 EQ/kg LW）的文献中发现的范围内。牛肉牛和果奶是乳制品耕种的重要产量，因此可以获得牛奶和肉类具有较低CF和相关环境影响的牛奶和肉类。此外，在文献中发现的数据的可变性以及基于在奶牛场上构造的牛肉肉类的实际数据缺乏LCA研究，这证明了对这个有趣的话题的深入研究的重要性。
Amanda Laca; Adriana Laca ; Mario Díaz. Environmental advantages of coproducing beef meat in dairy systems[J]. Environmental Technology Letters, 2023,44(4): 446-465