Effect of Dietary Bacillus subtilis on Growth Performance, Serum Biochemical Indices and Tibia Index of Broilers

ZHANG Anrong; LIU Jiao; CHEN Zhimin; CHANG Wenhuan; DENG Xuejuan; CAI Huiyi; LIU Guohua; ZHENG Aijuan

doi:10.3969/j.issn.1006-267x.2020.09.021

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 9: 4123 - 4131

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.09.021

Effect of Dietary Bacillus subtilis on Growth Performance, Serum Biochemical Indices and Tibia Index of Broilers

ZHANG Anrong ,
LIU Jiao ,
CHEN Zhimin ,
CHANG Wenhuan ,
DENG Xuejuan ,
CAI Huiyi ,
LIU Guohua ,
ZHENG Aijuan

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1. Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. National Engineering Research Center for Biological Feed Development, Beijing 100081, China

Received date: 2020-03-28

Online published: 2020-09-17

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Abstract

The present study aimed to evaluate the effects of dietary Bacillus subtilis on growth performance, serum biochemical indices and tibia index of broiler chickens. A total of one hundred and eighty 1-day-old healthy Arbor Acres broiler chickens were randomly allotted to three groups with six replicates per group and 10 chickens per replicate. Broilers in the control group were fed a basal diet, those in the antibiotic group were fed the basal diet supplemented with 5 mg/kg flavomycin, 75 mg/kg aureomycin and 20 mg/kg kitasamycin, and those in the Bacillus subtilis group were fed the basal diet supplemented with 1.5×10¹⁰ CFU/kg Bacillus subtilis, respectively. The experiment lasted for 42 days. The results showed as follows:1) compared with the control group, dietary Bacillus subtilis did not significantly affect the final body weight and average daily weight gain of broilers from 1 to 21 days and 22 to 42 days of age (P>0.05), but significantly reduced the average daily feed intake of broilers from 1 to 21 days of age (P<0.05), and significantly increased the ratio of feed to gain of broilers from 22 to 42 days of age (P<0.05). 2) Compared with the control group, dietary Bacillus subtilis extremely significantly increased the serum contents of total cholesterol and triglyceride of broilers at 21 days of age (P<0.01), and extremely significantly increased the serum alkaline phosphatase activity of broilers at 42 days of age (P<0.01). 3) Compared with the control group and antibiotic group, dietary Bacillus subtilis extremely significantly increased the serum contents of total protein and albumin of broilers at 42 days of age (P<0.01), significantly increased serum globulin content (P<0.05), and extremely significantly reduced the serum contents of ammonia and uric acid of broilers at 21 days of age (P<0.01). 4) Compared with the control group, dietary Bacillus subtilis extremely significantly increased the contents of calcium and phosphorus in tibia of broilers at 42 days of age (P<0.01); compared with the antibiotic group, there was a significant increase on tibia strength of broilers in the Bacillus subtilis group (P<0.05). In conclusion, dietary Bacillus subtilis can significantly reduce the average daily feed intake of broilers from 1 to 21 days of age, significantly increase the ratio of feed to gain of broilers from 22 to 42 days of age, but improve the lipid metabolism, increase the serum protein deposition, decrease the nitrogen emissions, also promote the deposition of calcium and phosphorus in the tibia of broilers.

Key words： Bacillus subtilis; broilers; growth performance; serum biochemical indices; tibia index

Cite this article

ZHANG Anrong , LIU Jiao , CHEN Zhimin , CHANG Wenhuan , DENG Xuejuan , CAI Huiyi , LIU Guohua , ZHENG Aijuan . Effect of Dietary Bacillus subtilis on Growth Performance, Serum Biochemical Indices and Tibia Index of Broilers[J]. Chinese Journal of Animal Nutrition, 2020 , 32(9) : 4123 -4131 . DOI: 10.3969/j.issn.1006-267x.2020.09.021

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