Effect of vitamin E and L-carnitine on growth performance, blood parameters and immune response of broiler chickens under heat stress

Document Type : Research Paper

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Abstract

This study was conducted to investigate effects of different levels of vitamin E (0, 100 and 200 mg/kg) and L-carnitine (0, 50 and 100 mg/kg) on growth performance and some blood and immune parameters of broilers under heat stress, using completely randomized design with 3Í3 factorial treatment arrangement and 4 replicates pertreatment. Heat stress was induced from the beginning of forth week. Performance parameters were recorded weekly. At 28 and 35 days of age, antibody titer against SRBC was determined. At 42 days of age, blood samples were collected and carcass characteristics analysis was done. Levels of vitamin E and L-carnitine had no significant effect on performance parameters. Vitamin E increased the weight of the bursa of fabricius (P<0.05) and L-carnitine decreased abdominal fat percentage (P<0.01). L-carnitine at 50 mg/kg of diet increased antibody titer against SRBC during the primary response (P<0.05). Supplementing diet with vitamin E and L-carnitine just decreased serum triglyceride. According to the results of this experiment, it appears that different levels of vitamin E and L-carnitine were not effective on performance parameters but decreased abdominal fat percentage and blood triglyceride and improved immune response of chickens.

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References

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Animal Sciences Journal
Volume 29, Issue 110
June 2016
Pages 115-128

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