Chen Yuhang, Yuan Cong, Yang Tianyu, Song Han, Zhan Kang, Zhao Guoqi
Institute of Animal Culture Collection and Application, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China.
Animals (Basel). 2024 Jan 17;14(2):290. doi: 10.3390/ani14020290.
This experiment investigated the effects of different levels of bile acid (BA) additives in diets on the lactation performance, serum antioxidant metabolites, and serum biochemical indices of 60 multiparous mid-lactation dairy cows. The cows were randomized to receive one of the four homogeneous treatments, with the BA preparation supplemented at 0, 6, 12, and 18 g/head/d. The experiment lasted for 14 weeks. The first 2 weeks were the pre-feeding period. The milk yield and composition data were recorded weekly, and the dry matter intake and antioxidative blood index were analyzed on the 6th, 10th, and 14th weeks of the study. On the 84th day of the experiment, the experimental group exhibited significantly higher levels of total protein and albumin, by 57.5% and 55.6%, respectively, compared to the control group ( < 0.05). On both the 28th and 84th days of the trial, the experimental group showed a markedly higher lipase content compared to the control group, by 26.5% and 25.2%, respectively ( < 0.05). Furthermore, the experimental group displayed notably elevated levels of superoxide dismutase, glutathione peroxidase, and total antioxidant capacity, surpassing the control group by 17.4%, 21.6%, and 8.7%, respectively. In conclusion, BA additives improve the serum antioxidant indices of dairy cows, thereby enhancing the performance of these cows.
本实验研究了日粮中不同水平胆汁酸（BA）添加剂对60头经产泌乳中期奶牛泌乳性能、血清抗氧化代谢产物和血清生化指标的影响。奶牛被随机分为四组同质处理，分别按0、6、12和18克/头/天补充BA制剂。实验持续14周。前2周为预饲期。每周记录产奶量和成分数据，并在研究的第6、10和14周分析干物质摄入量和抗氧化血液指标。在实验的第84天，实验组的总蛋白和白蛋白水平显著高于对照组，分别高出57.5%和55.6%（P<0.05）。在试验的第28天和第84天，实验组的脂肪酶含量均显著高于对照组，分别高出26.5%和25.2%（P<0.05）。此外，实验组的超氧化物歧化酶、谷胱甘肽过氧化物酶和总抗氧化能力水平显著升高，分别比对照组高出17.4%、21.6%和8.7%。总之，BA添加剂可改善奶牛的血清抗氧化指标，从而提高奶牛的生产性能。
