文献类型： 外文期刊

作者： Dong, Jianan ¹ ; Liu, Yongjun ¹ ; Li, Songze ¹ ; Sun, Zhe ¹ ; Chen, Xue ¹ ; Wang, Duojia ⁵ ; Qin, Guixin ¹ ; Zhang, Xuefeng ¹ ; Aschalew, Natnael Demelash ¹ ; Wang, Tao ¹ ; Zhen, Yuguo ¹ ;

作者机构： 1.Jilin Agr Univ, Coll Anim Sci & Technol, Minist Educ,JLAU Borui Dairy Sci & Technol R&D Ct, Key Lab Anim Nutr & Feed Sci Jilin Prov,Key Lab A, Changchun 130118, Peoples R China

2.Ningxia Agr Reclamat Helan Mt Dairy Co Ltd, Yinchuan, Ningxia, Peoples R China

3.Changchun Borui Sci & Technol Co Ltd, Feed Engn Technol Res Ctr Jilin Prov, Postdoctoral Sci Res Workstn, Changchun, Peoples R China

4.Jilin Agr Univ, Coll Life Sci, Changchun, Peoples R China

5.Jilin Acad Agr Sci, Inst Anim Sci, Changchun, Peoples R China

关键词： bacterial community composition; Holstein dairy cows; milk yield; physiological dissimilarities; rumen fermentation parameters; serum indicator

期刊名称：VETERINARY MEDICINE AND SCIENCE （ 影响因子：1.772； 五年影响因子：1.885 ）

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收录情况： SCI

摘要： Background: Even if breed, parity, dietary and environmental management are same, dairy cows still have notable differences in milk yield that may be underpinned by physiologic differences. Objectives: This study aimed to investigate the physiological dissimilarities of dairy cows with different milk yields. Methods: Thirty cows were sorted into high milk-yielding cows (group H: 58.93 +/- 2.31 kg/day), moderate milk-yielding cows (group M: 44.99 +/- 0.54 kg/day), and low milk-yielding cows (group L: 24.99 +/- 6.83 kg/day) according to milk yield. Blood was collected and serum parameters were assessed. Rumen fluid was collected for the evaluation of rumen fermentation parameters (RFPs) and bacterial community composition (BCC). Results: Serum prolactin, growth hormone, glutathione peroxidase, immunoglobulin A and non-esterified fatty acid had a significantly positive correlation with milk yield (p < 0.05), whereas serum glucagon and total antioxidant capacity had a significantly negative correlation with milk yield (p < 0.05). The concentration of valeric acid and the ratio of acetic acid to propionic acid in the rumen fluid in group H was significantly lower than that in group L (p < 0.05). The concentration of acetic acid and butyric acid in group H was significantly lower than that in groups M and L (p < 0.05). The relative abundances of Ruminococcoceae_NK4A214_group, Prevotella_1, Rikenellaceae RC9_gut_group, Christensenellaceae R-7_group, Muribaculaceae, and Ruminococcus2 were negatively correlated with milk yield, whereas the relative abundance of Succinivibrionaceae_UCG-001, Lachnospiraceae_NK3A20_group, Shuttleworthia and Dialister were positively correlated with milk yield (p < 0.05). Conclusions: This study indicates that dairy cows with different milk yields have clear divergence in serum indicators, RFPs, BCC and rumen microbial metabolism.