RESEARCH PAPER

Effects of Dietary Yeast Polypeptides on Growth Performance, Carcass Composition and Intestinal Microbiota of Broilers

  • AN Sha ,
  • JIA Yougang ,
  • ZHOU Ying ,
  • LYU Zunzhou ,
  • GUO Shuang ,
  • XU Chongwei ,
  • ZHANG Qianfang ,
  • YAN Lei ,
  • ZHOU Guilian
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  • 1. Shandong New Hope Liuhe Group Co., Ltd., Qingdao 266061, China;
    2. Key Laboratory of Quality Control for Feed and Products of Livestock and Poultry, Ministry of Agriculture, New Hope Liuhe Group Co., Ltd., Chengdu 610101, China;
    3. Wuhan SunHY Biological Co., Ltd., Wuhan 430206, China;
    4. Laiyang Liuhe Feed Co., Ltd., Laiyang 265200, China

Received date: 2022-01-08

  Online published: 2022-07-14

Abstract

This experiment was to study the effects of dietary yeast polypeptides on growth performance, carcass composition and intestinal microbiota of broilers. A total of 540 one-day-old Ross 308 male broilers were randomly divided into 3 groups with 6 replicates in each group and 30 chickens in each replicate. Broilers in the blank control group were fed a basal diet, broilers in the antibiotic group were fed the basal diet supplemented with 20 g/t virginiamycin, and others in yeast polypeptides group were fed the basal diet supplemented with 200 g/t yeast polypeptides. The experiment lasted for 37 days. The results showed as follows:1) there were no significant differences in growth performance, carcass composition and immune organ indexes among all groups (P>0.05). 2) Compared with the blank control group, the ileum Firmicutes relative abundance of antibiotic group was trend to decrease (P=0.06), and the Proteobacteria relative abundance was trend to increase (P=0.09). The ileum Firmicutes relative abundance of yeast polypeptides group was the highest (99.55%), and the Proteobacteria relative abundance was the lowest (0.35%). 3) Compared with the blank control group, the ileum Lactobacillus relative abundance of antibiotic group was significantly decreased (P<0.05), while the ileum Lactobacillus relative abundance of yeast polypeptides group was increased (P>0.05). Compared with the antibiotic group, the ileum Enterobacter relative abundance of yeast polypeptides group was trend to decrease (P=0.06), and the Staphylococcus relative abundance was significantly decreased (P<0.05). In conclusion, dietary yeast polypeptides have no significant effect on the growth of broilers, but reduce the abundance of relative abundances of Proteobacteria, Enterobacter and Staphylococcus in ileum, increase the relative abundances of Firmicutes and Lactobacillus in ileum, thus improve the intestinal microbial flora composition.

Cite this article

AN Sha , JIA Yougang , ZHOU Ying , LYU Zunzhou , GUO Shuang , XU Chongwei , ZHANG Qianfang , YAN Lei , ZHOU Guilian . Effects of Dietary Yeast Polypeptides on Growth Performance, Carcass Composition and Intestinal Microbiota of Broilers[J]. Chinese Journal of Animal Nutrition, 2022 , 34(7) : 4261 -4270 . DOI: 10.3969/j.issn.1006-267x.2022.07.018

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