Effect of Fermented Feed on Intestinal Microbial Community Diversity of Chicks

摘要

[Objective]The paper was to study the effects of fermented feed on structure and diversity of intestinal flora in the duodenum,jejunum,ileum and cecum of chicks,and to clarify the mechanism of fermented feed on growth and health of chicks.[Method]The 3601-day-old Hyline brown egg chicks were randomly divided into three treatment groups,six replicates each group,and were fed with basal diet,basal diet+antibiotics and basal diet+fermented feed,respectively.The structure and distribution of intestinal microbial community of egg chicks in each group were determined by Illumina MiSeq sequencing technology.[Result]The Chaol index and Shannon index indicated that the abundance and diversity of microorganisms in unfermented feed group were significantly higher than those in fermented feed group,and the abundance and diversity of flora in the duodenum,jejunum and ileum of each group were significantly higher than those in the cecum.[Conclusion]Feeding fermented feed significantly increases the abundance of Lactobacillus and reduces the number of pathogenic bacteria such as DSV and Bacieroides in the intestinal tract,which also indirectly proves that Lactobacillus inhibits the proliferation of DSV and prevents intestinal diseases.Feeding fermented feed increases the abundance of Firmicutes,significantly decreases the proportion of Bacteroidetes and Firmicutes,and promotes the growth of chicks.