11/05/2026
Jiyuan Zhang et al., Protein levels alter yak rumen microbiota profiles, meat properties, and longissimus dorsi metabolites. Animal Bioscience 2026; 39(5): 250027. Published online: July 11, 2025 [the study led by Prof. Shuxiang Wang at Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science of Qinghai Province, Xining, China]
This research explored how different dietary protein levels affect the rumen microbiota, meat quality, and metabolism of yaks under low-energy conditions. While a 16% protein diet slightly improved meat tenderness and color, no significant differences were observed in average daily weight gain between the groups. Metabolomic analysis indicated that yaks on a 14% protein diet had a better capacity for fatty acid and antioxidant metabolism, implying more efficient energy use. The authors recommend a 14% protein diet as the optimal choice for yak fattening under low-energy conditions to ensure both health and productivity.
This research was supported by the following funds: Qinghai Province Science and Technology Special Project “Application and Demonstration of Efficient Yak Breeding Technology in Xinghai County and Tongren City” (Project No.: 2024-NK-P19) and Qinghai Province “Kunlun Talents · High-end Innova...