Effects of Bacillus preparation on carcass performance and intestinal microflora of Avian broiler chicken
A total of 480 7-day-old Avian broilers were randomly divided into eight groups with three replicates per group and twenty birds in each replicate (half male and half female). Single or multiple ones of three kinds of Bacillus preparation suitable for the birds were added to the daily diet of chicke...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2012-05-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2012.03.011 |
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| Summary: | A total of 480 7-day-old Avian broilers were randomly divided into eight groups with three replicates per group and twenty birds in each replicate (half male and half female). Single or multiple ones of three kinds of Bacillus preparation suitable for the birds were added to the daily diet of chicken to investigate the effects of Bacillus additive on the growth performance, carcass, immunity and intestinal microflora of broilers. The eight groups were the control group, BC1 (B. cereus with high ability of producing protease), BC2 (B. cereus with high ability of producing cellulase), BS3 (B. subtilis) group and BC1 + BC2, BC1 + BS3, BC2 + BS3, BC1 + BC2 + BS3 group, respectively, and the additive amount of every kind of Bacillus preparation in daily diet of treatment groups was 3×10<sup>5</sup> CFU·g<sup>-1</sup>. The results showed that the daily mass gain and the feed-to-gain ratio of broilers fed diet with BC1 + BC2 were affected significantly, with the daily mass gain increasing by 9.97% and the feed-to-gain ratio decreasing by 8.46%; the leg muscle rate of broiler in BC1 and BC1 + BC2 groups was increased significantly by 8.46% and 7.95% respectively, compared with the control group; the abdominal fat rate in BC 1, BC1 + BC2 and BC1 + BC2 + BS3 groups was decreased significantly by 26.6%, 30.2% and 25.8% respectively, and the spleen index of broiler in BC1 + BC2 and BC1 + BC2 + BS3 groups was improved significantly, as well as the bursa index in BC1 + BC2, BC1 + BS3 and BC1 + BC2 + BS3 groups, compared with the control group. Adding BC1 + BC2, BC1 + BS3 and BC1 + BC2 + BS3 in daily diet could reduce significantly the number of Escherichia coli in broiler caecum. These results above indicate that the optimal Bacillus preparation for broiler is BC1 + BC2. |
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| ISSN: | 1008-9209 2097-5155 |