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Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase

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Abstract
The objective of this study was to evaluate the effect of the interaction of the zinc source (ZnSO4 vs. zinc amino acid complex) and vitamin E level (50 IU/kg vs. 100 IU/kg) on meat yield and quality in broilers subjected to chronic cyclic heat stress in the finisher phase. A total of 1224 one-day-old male Ross 308 broilers were randomly distributed among four dietary treatments. Each treatment contained nine replicates of 34 birds, housed in floor pens in a temperature- and lighting-controlled room. Treatments were organized in a 2 x 2 factorial arrangement: two sources of zinc, 60 mg/kg of Zn as ZnSO4 or 60 mg/kg of Zn as zinc amino acid complexes (ZnAA), combined with two levels of vitamin E (50 or 100 IU/kg). From day 28 until day 37 (finisher phase), all birds were subjected to chronic cyclic heat stress (32 & PLUSMN; 2 & DEG;C for 6 h daily). In the present study, it was observed that replacing ZnSO4 with ZnAA increased breast meat weight and yield of broilers reared under chronic cyclic heat stress conditions, whereas total slaughter yield was not affected. Moreover, it was observed that replacing ZnSO4 with ZnAA resulted in breast meat with a lower drip and thawing loss and a higher marinade uptake. In conclusion, replacing ZnSO4 with more readily available ZnAA can improve breast meat yield and increase the water-holding capacity of breast meat of broilers exposed to chronic cyclic heat stress at the end of the production cycle. However, as no thermoneutral group was included in the present study, the observed effects of the zinc source cannot be generalized as a solution for heat stress. Moreover, the beneficial effects of ZnAA on breast meat yield and quality seem to be independent of the vitamin E level, and increasing vitamin E level has no additional beneficial effects.
Keywords
GROWTH-PERFORMANCE, IMMUNE-RESPONSE, ASCORBIC-ACID, POULTRY, SUPPLEMENTATION, TRAITS, METABOLISM, IMPACT, FEED, zinc, vitamin E, broiler, carcass yield, meat quality, heat stress

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MLA
De Grande, Annatachja, et al. “Effects of the Dietary Zinc Source and Vitamin E Level on Live Weight and Carcass Yield and Meat Quality in Male Broilers Reared under Chronic Cyclic Heat Stress Conditions in the Finisher Phase.” FRONTIERS IN PHYSIOLOGY, vol. 13, 2022, doi:10.3389/fphys.2022.992689.
APA
De Grande, A., Ducatelle, R., Leleu, S., Rapp, C., Torres, C., Petracci, M., … Delezie, E. (2022). Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase. FRONTIERS IN PHYSIOLOGY, 13. https://doi.org/10.3389/fphys.2022.992689
Chicago author-date
De Grande, Annatachja, Richard Ducatelle, Saskia Leleu, Christof Rapp, Cibele Torres, Massimiliano Petracci, Stefaan De Smet, et al. 2022. “Effects of the Dietary Zinc Source and Vitamin E Level on Live Weight and Carcass Yield and Meat Quality in Male Broilers Reared under Chronic Cyclic Heat Stress Conditions in the Finisher Phase.” FRONTIERS IN PHYSIOLOGY 13. https://doi.org/10.3389/fphys.2022.992689.
Chicago author-date (all authors)
De Grande, Annatachja, Richard Ducatelle, Saskia Leleu, Christof Rapp, Cibele Torres, Massimiliano Petracci, Stefaan De Smet, Joris Michiels, Freddy Haesebrouck, Filip Van Immerseel, and Evelyne Delezie. 2022. “Effects of the Dietary Zinc Source and Vitamin E Level on Live Weight and Carcass Yield and Meat Quality in Male Broilers Reared under Chronic Cyclic Heat Stress Conditions in the Finisher Phase.” FRONTIERS IN PHYSIOLOGY 13. doi:10.3389/fphys.2022.992689.
Vancouver
1.
De Grande A, Ducatelle R, Leleu S, Rapp C, Torres C, Petracci M, et al. Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase. FRONTIERS IN PHYSIOLOGY. 2022;13.
IEEE
[1]
A. De Grande et al., “Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase,” FRONTIERS IN PHYSIOLOGY, vol. 13, 2022.
@article{8773191,
  abstract     = {{The objective of this study was to evaluate the effect of the interaction of the zinc source (ZnSO4 vs. zinc amino acid complex) and vitamin E level (50 IU/kg vs. 100 IU/kg) on meat yield and quality in broilers subjected to chronic cyclic heat stress in the finisher phase. A total of 1224 one-day-old male Ross 308 broilers were randomly distributed among four dietary treatments. Each treatment contained nine replicates of 34 birds, housed in floor pens in a temperature- and lighting-controlled room. Treatments were organized in a 2 x 2 factorial arrangement: two sources of zinc, 60 mg/kg of Zn as ZnSO4 or 60 mg/kg of Zn as zinc amino acid complexes (ZnAA), combined with two levels of vitamin E (50 or 100 IU/kg). From day 28 until day 37 (finisher phase), all birds were subjected to chronic cyclic heat stress (32 & PLUSMN; 2 & DEG;C for 6 h daily). In the present study, it was observed that replacing ZnSO4 with ZnAA increased breast meat weight and yield of broilers reared under chronic cyclic heat stress conditions, whereas total slaughter yield was not affected. Moreover, it was observed that replacing ZnSO4 with ZnAA resulted in breast meat with a lower drip and thawing loss and a higher marinade uptake. In conclusion, replacing ZnSO4 with more readily available ZnAA can improve breast meat yield and increase the water-holding capacity of breast meat of broilers exposed to chronic cyclic heat stress at the end of the production cycle. However, as no thermoneutral group was included in the present study, the observed effects of the zinc source cannot be generalized as a solution for heat stress. Moreover, the beneficial effects of ZnAA on breast meat yield and quality seem to be independent of the vitamin E level, and increasing vitamin E level has no additional beneficial effects.}},
  articleno    = {{992689}},
  author       = {{De Grande, Annatachja and Ducatelle, Richard and Leleu, Saskia and Rapp, Christof and Torres, Cibele and Petracci, Massimiliano and De Smet, Stefaan and Michiels, Joris and Haesebrouck, Freddy and Van Immerseel, Filip and Delezie, Evelyne}},
  issn         = {{1664-042X}},
  journal      = {{FRONTIERS IN PHYSIOLOGY}},
  keywords     = {{GROWTH-PERFORMANCE,IMMUNE-RESPONSE,ASCORBIC-ACID,POULTRY,SUPPLEMENTATION,TRAITS,METABOLISM,IMPACT,FEED,zinc,vitamin E,broiler,carcass yield,meat quality,heat stress}},
  language     = {{eng}},
  pages        = {{9}},
  title        = {{Effects of the dietary zinc source and vitamin E level on live weight and carcass yield and meat quality in male broilers reared under chronic cyclic heat stress conditions in the finisher phase}},
  url          = {{http://dx.doi.org/10.3389/fphys.2022.992689}},
  volume       = {{13}},
  year         = {{2022}},
}

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