摘要
The goals of this study were to investigate the production performance, immunity, and heat stress resistance of Jersey cattle fed a concentrate fermented with compound probiotics in the presence of a Chinese herbal combination (CHC). First, the appropriate concentrations for the six Chinese herbs required to stimulate probiotic proliferation were investigated in vitro. Next, the optimal time and moisture content were determined for fermentation. We then tested the feeding effect of our fermented product on 36 growing cattle and 36 milking cows. The animals were randomly assigned to receive the product or not, resulting in half of each group receiving the treatment or serving as the control group. For 60 days, the experimental group was fed with the fermented product and the control group was fed with a basic concentrate that did not contain the probiotics or the Chinese herbs. The results showed that the cattle that received the fermented concentrate showed improved weight gain and milking cows that received the fermented concentrate showed increased average milk yield, milk fat content, and solid-not-fat content (P < 0.05). In addition, the serum levels of growth hormone, the 70 kDa heat shock protein (HPS70), and immunoglobulin G (IgG) of the cattle in the experimental group were significantly higher than the levels of cattle in the control group. A similar increase in the serum levels of HPS70, IgG, immunoglobulin A, and interferon γ was observed in milking cows that received the treatment (P < 0.05). No significant differences (P > 0.05) were observed in the serum levels of interleukin-2. Moreover, milking cows that received the fermented concentrate showed increased apparent digestibility of crude protein, ether extract, and crude fiber (P < 0.05). For the growing cattle, only crude protein digestibility was significantly increased in the experimental group (P < 0.05). Finally, we found that the ammonia content in the barn was decreased after the animals received the fermented concentrate. These results demonstrated that our fermented concentrate improved production performance, immunity, and heat stress resistance in Jersey cattle. We also demonstrated that this CHC and a mixture of probiotic strains acted as an ideal leavening agent for cattle’s concentrate.
摘要译文
本研究的目的是调查生产绩效，免疫力，和中草药组合（CHC）存在下，用复合益生菌发酵的浓缩饲料的泽西牛的耐热胁迫性。第一，在体外研究了刺激益生菌增殖所需六种中草药的适宜浓度。下一个，确定发酵的最佳时间和含水量。然后，我们测试了我们的发酵产品对36只生长牛和36头奶牛的喂养效果。动物被随机分配接受产品，导致每组接受治疗的一半或用作对照组。 60天实验组给予发酵产品，对照组喂养不含益生菌或中草药的碱性浓缩液。结果表明，接受发酵浓缩物的牛显着改善体重增加，收获发酵浓缩物的奶牛显示出平均产奶量增加，乳脂含量和固体不脂肪含量（P 0.05）。此外，血清生长激素水平，70 kDa热休克蛋白（HPS70），和实验组牛的免疫球蛋白G（IgG）显着高于对照组的牛的水平。血清HPS70，IgG，在接受治疗的奶牛中观察到免疫球蛋白A和干扰素γ（P 0.05）。在白细胞介素-2的血清水平中没有观察到显着性差异（P 0.05）。此外，接受发酵浓缩乳的奶牛显示粗蛋白，乙醚提取物和粗纤维的表观消化率增加（P 0.05）。对于不断增长的牛，实验组只有粗蛋白消化率显着升高（P 0.05）。最后，我们发现在动物接受发酵浓缩物之后，谷仓中的氨含量降低。这些结果表明，我们的发酵浓缩物可以改善泽西牛的生产性能，免疫力和耐热胁迫性。我们还表明，这种CHC和益生菌菌株的混合物是牛精矿的理想膨松剂。
Xiang Wang; Haijun Xie; Fu Liu; Yuhong Wang. Production performance, immunity, and heat stress resistance in Jersey cattle fed a concentrate fermented with probiotics in the presence of a Chinese herbal combination[J]. Animal Feed Science and Technology, 2017,228: 59–65