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Optimal dietary concentration of vitamin E for alleviating the effect of heat stress on performance, thyroid status, ACTH and some serum metabolite and mineral concentrations in broilers

Author

Listed:
  • K. Sahin

    (Department of Animal Nutrition, Veterinary Faculty, University of Firat, Elazig, Turkey)

  • O. Kucuk

    (Department of Animal Nutrition, Veterinary Faculty, University of Firat, Elazig, Turkey)

  • N. Sahin

    (Department of Animal Nutrition, Veterinary Faculty, University of Firat, Elazig, Turkey)

  • M. F Gursu

    (Department of Animal Nutrition, Veterinary Faculty, University of Firat, Elazig, Turkey)

Abstract

An experiment utilizing Cobb-500 male broilers was conducted to evaluate the effects of vitamin E (d1--to- copheryl acetate) supplementation at various concentrations (0, 62.5, 125, 250, or 500 mg/kg of diet) on performance and serum concentrations of Triiodothyronine (T3), Thyroxin (T4), Adrenocorticotropine Hormone (ACTH), and some metabolites and minerals in broilers reared under heat stress (32°C). One day-old 150 male broilers were randomly assigned to 5 treatment groups, 3 replicates of 10 birds each. The birds received either a basal diet or basal diet supplemented with vitamin E at 62.5, 125, 250, or 500 mg/kg of diet. Increased supplemental vitamin E linearly increased feed intake (P = 0.01), live weight gain (P = 0.01), and improved feed efficiency linearly (P = 0.001). Increasing dietary vitamin E supplementation also resulted in linear increases in serum T3 and T4 concentrations (P = 0.01) but, linear decreases in ACTH concentration (P = 0.01). Serum glucose, uric acid, triglycerides, and cholesterol concentrations decreased linearly (P = 0.001) while, protein and albumin concentrations increased linearly (P = 0.001) when dietary vitamin E supplementation increased. Serum activities of Serum Glutamic Oxalate Transaminase (SGOT) and Serum Glutamic Pyruvate Transaminase (SGPT) were not influenced by dietary vitamin E supplementation (P > 0.10). However, serum activity of Alkaline Phosphatase (AP) increased linearly (P = 0.001) with increasing dietary vitamin E supplementation. Increasing dietary vitamin E supplementation also caused linear increases (P = 0.001) in serum concentrations of Ca and P. Results of the present study conclude that a 250 mg/kg of vitamin E provides an optimal performance in broiler chicks reared under heat stress, and vitamin E supplementation at such a level can be considered as a protective management practice in a broiler diet, reducing the negative effects of heat stress.

Suggested Citation

  • K. Sahin & O. Kucuk & N. Sahin & M. F Gursu, 2002. "Optimal dietary concentration of vitamin E for alleviating the effect of heat stress on performance, thyroid status, ACTH and some serum metabolite and mineral concentrations in broilers," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 47(4), pages 110-116.
    • Handle: RePEc:caa:jnlvet:v:47:y:2002:i:4:id:5813-vetmed
    DOI: 10.17221/5813-VETMED
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    References listed on IDEAS

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    1. K. Sahin & N. Sahin & M. Onderci & S. Yaralioglu & O. Kucuk, 2001. "Protective role of supplemental vitamin E on lipid peroxidation, vitamins E, A and some mineral concentrations of broilers reared under heat stress," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 46(5), pages 140-144.
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