China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (8): 3563-3573.doi: 10.16431/j.cnki.1671-7236.2025.08.006

• Nutrition and Feed • Previous Articles    

Effect of Yeast Cultures on Growth Performance,Blood Physiological and Biochemical Indexes and Rumen Fermentation Parameters in Lambs

ZHANG Zhaoling1, LI Xiongxiong1, WANG Yanchi1, JIAO Ting4, TAN Xianyi2,3, LIU Chao3, ZHAO Shengguo1, CAI Yuan1   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
    3. Sichuan Runges Biotechnology Co., Ltd., Mianzhu 618200, China;
    4. College of Prataculture, Gansu Agricultural University, Key Laboratory of Prataculture Ecosystem of Ministry of Education, China-U. S. Grassland Animal Husbandry Sustainable Development Research Center, Lanzhou 730070, China
  • Received:2024-11-20 Published:2025-08-02

Abstract: 【Objective】 The aim of the experiment was to investigate the effects of dietary addition of yeast cultures on the growth traits,blood physiological and biochemical indices,slaughter performance,rumen fermentation parameters and conventional nutrient composition of lamb in the F1 generation of Aohu (Australian White sheep♂×Hu sheep♀) lambs,so as to provide references for the scientific rearing of Aohu crossbred lambs. 【Method】 Fourteen 3-month-old F1 weaned male lambs of Aohu with good health and similar body weight (22.50 kg±1.40 kg) were randomly divided into two groups,with 7 lambs in each group.The lambs in control group were fed a basal diet,and in experimental group were fed the basal diet supplemented with 1.0% yeast culture (air-dried basis).The pre-feeding period was 10 d,and the experimental period was 60 d.On the day of 0,30 and 60,all sheep were weighed and body size indexes were measured.On the ending of the experiment,blood was collected to determine blood physiological and biochemical indexes,and slaughter performance,rumen fermentation parameters and longissimus dorsi routine nutritional components were measured after slaughter. 【Result】 ①Fattening 30 days,the body slant length of lambs in experimental group was increased by 7.58% compared with that of control group (P<0.01).②Compared with control group,the pre-slaughter live weight of lambs in experimental group was increased by 14.30% (P<0.05),and the carcass fat content (GR) value was increased by 7.78% (P<0.01).③Compared with control group,the content of albumin (ALB) in blood of lambs in experimental group was increased by 9.03% (P<0.01),the content of triglyceride (TG) was decreased by 56.25% (P<0.01),the activity of aspartate aminotransferase (AST) was increased by 28.13% (P<0.05),the content of total protein (TP) was increased by 8.58% (P<0.05),and the content of red blood cell (RBC) and hemoglobin concentration (HGB) were decreased by 7.48% and 8.39% (P<0.05),respectively.④Compared with control group,the pH of rumen fluid in experimental group was increased by 14.08% (P<0.05),and the moisture content of longissimus dorsi muscle was decreased by 1.37% (P<0.05). 【Conclusion】 Adding 1.0% yeast culture to the ration of fattening lambs could promote the homeostasis of the organismal internal environment,improve the health level and rumen internal environment,prevent the occurrence of rumen acidosis,and further improve the meat quality.

Key words: yeast cultures; Aohu crossbred sheep; growth performance; rumen fermentation parameters; blood indices

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