Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Xylanase supplementation in energy-deficient corn-based diets: impact on broiler growth, nutrient digestibility, chyme viscosity and carcass proximates

  • Bernadette Gerpacio Sta. Cruz (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Jun Seon Hong (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Myunghwan Yu (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Elijah Ogola Oketch (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Hyeonho Yun (Technical Marketing, Protein Solution Division, CJ CheilJedang Bio) ;
  • Dinesh D. Jayasena (Department of Animal Science, Uva Wellassa University) ;
  • Jung-Min Heo (Department of Animal Science and Biotechnology, Chungnam National University)
  • Received : 2023.09.05
  • Accepted : 2024.01.17
  • Published : 2024.07.01
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Abstract

Objective: The goal of the current study was to investigate the impact of various concentrations of xylanase in energy-deficient corn-based diets on the growth performance, carcass characteristics, nutrient digestibility, and digesta viscosity in broilers from 7 to 35 days of age. Methods: A total of 280 seven-day-old Ross 308 broilers were randomly allocated to one of the five dietary treatments following a completely randomized design with 8 replicates and 7 birds per cage. The treatments were: i) positive control (PC, without xylanase); ii) NC-1 (80 kcal/kg ME reduced from PC); iii) NC-2 (100 kcal/kg ME reduced from PC); iv) NCX-1 (NC-1 + 2,000 U/kg xylanase); and v) NCX-2 (NC-2 + 3,000 U/kg xylanase). Body weight, weight gain, feed intake, and feed conversion ratio were determined weekly to evaluate growth performance. One bird per pen was sacrificed for ileal digesta collection to determine the viscosity and digestibility of energy, dry matter, crude protein on days 24 and 35, however breast and leg meat samples were obtained for proximate analysis (moisture, crude protein, fat, and ash) on day 35. Results: Birds fed diets supplemented with xylanase regardless of the amount had higher (p<0.05) body weights, daily gains, and improved feed efficiency compared to NC diets all throughout the experimental period. Feed intake was not affected (p>0.05) by the addition of xylanase. Moreover, lowered (p<0.05) viscosity of the ileal digesta were observed upon xylanase inclusion in the diets compared to the birds fed NC diets on day 24. Ileal nutrient digestibility and meat proximate composition were not affected (p>0.05) by xylanase. Conclusion: The present study indicated that the xylanase at 2,000 U/kg and 3,000 U/kg levels compensates for the 80 kcal/kg and 100 kcal/kg dietary energy levels, respectively, without having adverse effects on the growth performance, carcass characteristics, nutrient digestibility, and digesta viscosity of broilers.

Keywords

Acknowledgement

The authors would like to show their appreciation to CJ Cheiljedang Corp., Republic of Korea, who supported this research through financial assistance and provision of additives.

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