Effects of Clostridium butyricum CB1 preparations on production performance,intestinal morphology and microflora of broilers

doi:10.14088/j.cnki.issn0439-8114.2021.17.020

Abstract

Abstract: This study was designed to investigate the effects of Clostridium butyricum CB1 preparations and composite probiotics added to the diets on broiler production performance, intestinal morphology and structure of microbial community. A total of 15 000 one-day old of Cobb500 broiler chickens were randomly divided into 5 groups, with 3 replicates in each group and 1 000 chickens in each replicate, they were fed with：group A （basal diet）, group B （basal diet supplemented with 50 g/t chlortetracycline）, group C1, C2 and D were basal diets supplemented with 100 g/t C. butyricum CB1 preparation, 200 g/t C. butyricum CB1 preparation and 200 g/t C. butyricum CB1 preparation and Bacillus subtilis preparation, 42 days trial period. The test results showed that broilers in antibiotic （chlortetracycline） group B and group C1, C2 and D fed with C. butyricum CB1 preparation could increase the average body weight in different levels. The average daily weight gain of groups C1, C2 and D from 1 to 21 days were higher than that in antibiotic group B （P<0.05 or P<0.01）, and the average daily gain of group D from 1 to 42 days was similar to that of group B （P>0.05）. During the test period, the feed conversion ratio and death rate of group C2 and group D was obviously below basal diet group A and antibiotic group B, and of these the height of cecum villus and VH/CD ratio of group D was the highest. Adding C. butyricum CB1 to the diet could significantly promote the proliferation of Lactobacillus and Bifidobacterium in ileum and cecum of broilers. It can be seen that the C. butyricum CB1 complex bacteria preparation has a growth-promoting effect equivalent to that of chlortetracycline. C. butyricum CB1 preparation added in diets can significantly increase the height of intestinal villi and the VH/CD value, effectively promote the growth performance of broilers, enhance immune function, promote the development of intestinal morphology, and improve intestinal flora.

Key words: Clostridium butyricum CB1, broiler, production performance, intestinal morphology and flora, replacing antibiotics

CLC Number:

S816.7
S831

HE Ju, LI Xiao-wen, CUI Wei-tao, GUO Jie, WANG Chun, XIAO Yun-cai, LI Zi-li, ZHOU Zu-tao. Effects of Clostridium butyricum CB1 preparations on production performance,intestinal morphology and microflora of broilers[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(17): 93-97.

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