Author(s): CAO Guang-tian, ZHAN Xiu-an, ZHANG Ling-ling, ZENG Xin-fu, LIU Jin-song, YANG Cai-mei, College of Animal Science and Technology, Zhejiang A & F University, College of Animal Sciences, Zhejiang University, Zhejiang Huijia Biological Technology Ltd.
Pages: 31-35
Year: 2016 Issue:  3
Journal: Chinese Journal of Animal Science
Keyword:  Bacillus amyloliquefaciens; growth performance; small intestinal development; immune function; broiler chickens;
Abstract: The present experiment was conducted to investigate the effects of Bac illus amyloliquefaciens on growth performance,small intestinal development,serum biochemical parameters and immune functions in broiler chickens.A total of 3601-day-old Ross 308 broilers were randomly divided into 3 treatments(control group,antibiotics group and Bacillus amyloliquefaciens group),6 replicates for each treatment,and 20 birds per replicate.The results showed that,compared with the control birds,dietary Bacillus amyloliquefaciens significantly increased the average body gain from d 1 to 42(P<0.05) and improved the feed efficiency from d 1 to 21(P<0.05).Birds fed with Bacillus amyloliquefaciens had higher(P<0.05) relative ileum length on d 28,the small intestinal relative weight on d 14 and 28(P<0.05) and the villus height of ileum(P<0.05) on d 14,21 and 28 than control birds.Bacillus amyloliquefaciens significantly increased the concentrations of serum total protein in serum on d 42(P<0.05) and immunoglobulin G and immunoglobulin M on d 7 and d 42 compared with control and antibiotic birds.