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Physiological responses of broiler chickens fed reduced-energy diets supplemented with emulsifiers

  • Oketch, Elijah Ogola (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Lee, Jung Woo (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Yu, Myunghwan (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Hong, Jun Seon (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Kim, Yu Bin (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Nawarathne, Shan Randima (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Chiu, Josh Wen-Cheng (Ecolex Animal Nutrition) ;
  • Heo, Jung Min (Department of Animal Science and Biotechnology, Chungnam National University)
  • 투고 : 2022.04.10
  • 심사 : 2022.06.13
  • 발행 : 2022.12.01

초록

Objective: To investigate the physiological effects of exogenous emulsifiers in broiler chickens that were fed tallow-incorporated reduced-energy diets over 35 days. Methods: A total of 256 Ross 308 one-day-old broilers (42.28±0.16 g) were randomly allocated in a 2×2 factorial arrangement to 32 pens with eight chicks per cage. Birds were fed one of four dietary treatments as follows: i) positive control (PCN; energy sufficient diet); ii) negative control (NCN; energy-deficient diet, -100 ME kcal/kg); iii) PCL (PCN plus 0.05% emulsifier); and iv) NCL (NCN plus 0.05% emulsifier). Growth performance was evaluated weekly whereas assessments for the carcass traits, digestibility, some blood metabolites, ileal morphology, and meat quality were measured on d 21 and d 35. Results: Birds fed the NCL diet had higher (p<0.05) body weights, daily gains, daily feed intake, and improved feed efficiency over the entire 35-day period. Improvements (p<0.05) for the ileal digestibility of crude fat, energy, and dry matter commensurate with longer (p<0.05) villus heights were also observed with emulsifiers in the NCL and PCL diets. For the carcass measurements, only the liver weights were increased (p<0.05) with emulsifiers in the supplemented groups. For blood metabolites, higher (p<0.05) lipase levels were noticed with emulsifiers in the NCL and PCL diets. In addition, marginal reductions (p = 0.076; p = 0.095, respectively) were also noted with emulsifiers for the total cholesterol and triglyceride contents on d 35. Regarding meat quality, breast muscle yellowness was increased (p<0.05) with emulsifier use in supplemented groups. Conclusion: Our results suggest that emulsifier supplementation at 0.05% in diets could potentially improve the growth performance and nutrient digestibility of broilers over 35 days. This could compensate for the lower growth performance that could be recorded with fat-incorporated lower-energy diets.

키워드

과제정보

The authors are grateful for the financial support from Ecolex Animal Nutrition (Kuala Lumpur, Malaysia). We also acknowledge the technical contribution of Joo Yong Jin of Solton Biochem Inc., and Yuldashboy Khayrullo Ugli Vohobjonov for helping with the farm work during this project.

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