Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effect of dietary metallo-protease and Bacillus velezensis CE 100 supplementations on growth performance, footpad dermatitis and manure odor in broiler chickens

  • Park, Cheol Ju (Department of Animal Science, Chonnam National University) ;
  • Sun, Sang Soo (Department of Animal Science, Chonnam National University)
  • Received : 2022.01.19
  • Accepted : 2022.04.18
  • Published : 2022.10.01
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Abstract

Objective: This study focused on the effect of dietary metallo-protease and Bacillus velezensis CE 100 on growth performance, carcass parameters, intestinal microflora, footpad dermatitis (FPD), and manure odor in broiler chickens. Methods: One hundred-ten (two-day-old Ross 308) broiler chicks were randomly assigned to five groups with two replicate pens. The dietary treatments were divided to control, metallo-protease groups (A1, added with 0.1%; A2, added with 0.2%) and B. velezensis CE 100 groups (B1, added with 0.5%; B2, added with 1.0%). Results: The feed intake was decreased in A1 and B2 compared to the other group (p<0.05). The liver weight was lower in B2 than in A2 (p<0.05). The Salmonella in the cecum was decreased in A2 compared to control and A1 (p<0.05). However, the lactic acid bacteria were increased in all treatments (p<0.05). The litter moisture content was decreased in A2, B1, and B2 (p<0.05). The litter quality visual score was increased in all treatments (p<0.05). The FPD score and prevalence were reduced in all treatments (p<0.05). The (CH3)2S emission was decreased in all treatments (p<0.05). Conclusion: The present study indicated that both additives improve litter quality and reduce the incidence of FPD. These findings suggest that dietary metallo-protease and B. velezensis CE 100 have the potential to improve the broiler chickens' welfare.

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Acknowledgement

The authors received no financial support for this article.

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