Evaluating the Effect of Dietary Protein-Energy Ratios on Yak Intestinal Microbiota Using High-Throughput 16S rRNA Gene Sequencing
文献类型： 外文期刊
作者： Zhu, Yanbin 1 ; Cidan, Yangji 1 ; Ali, Munwar 2 ; Lu, Sijia 2 ; Javed, Usama 2 ; Cisang, Zhuoma 1 ; Gusang, Deji 1 ; Danzeng, Quzha 1 ; Li, Kun 2 ; Basang, Wangdui 1 ;
作者机构： 1.Tibet Acad Agr & Anim Husb Sci, Inst Anim Husb & Vet Med, Lhasa 850009, Peoples R China
2.Nanjing Agr Univ, Coll Vet Med, Nanjing 210095, Peoples R China
关键词： protein-energy ratio; 16S rRNA sequencing; microbial diversity; yak intestinal microbiota
期刊名称：VETERINARY SCIENCES （ 影响因子：2.3； 五年影响因子：2.4 ）
ISSN：
年卷期： 2025 年 12 卷 3 期
页码：
收录情况： SCI
摘要： This study investigated the impact of varying dietary protein-energy ratios on the intestinal microbiota composition in postpartum weaned female yak. For this study, forty yaks were divided into four groups and provided with different dietary treatments (group FA: high-energy high-protein, FB: high-energy low-protein, FC: low-energy high-protein, and FD: control group, provided with 48% alfalfa hay, 48% oat grass, and 4% premix) to investigate the variations in microflora profiles and metabolic responses. Rectal fecal samples (n = 24 x 2) were collected at day 15 and 30, from all four groups, and total DNA was extracted to estimate microbial heterogeneity and community structures by 16S rRNA sequencing focusing V3-V4 regions, using the Illumina Nova Seq 6000 platform. The results revealed a total of 5,669,645 raw data sequences (3,189,115 and 2,480,530 from day 15 and day 30, respectively). Results showed that groups FA and FB had enhanced protein metabolism and microbial diversity, which was marked by a significant increase (p < 0.05) in abundance of Ruminococcus. Conversely, the FD group showed a low level of microbial diversity with a significant (p < 0.05) predominance of Clostridium and Proteobacteria, indicating microbial dysbiosis and metabolic stress. It was concluded that imbalanced diets (groups FC and FD) upregulated the stress-related pathways with no favorable microbial shifts, whereas, dietary treatments in group FA and FB significantly (p < 0.05) supported the pathways involved in amino acids and carbohydrate metabolism and beneficially shifted the gut microbiota. These findings emphasize the importance of postpartum supplementation with appropriate proportions of protein and energy feed to promote optimal microbial health and metabolic functioning, particularly for yaks inhabiting high-altitude regions, which is a challenging environment.
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