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Influence of Vitamin E Supplementation and Stocking Density on Performance,
Thyroid Status, Some Blood Parameters, Immunity and Antioxidant Status in Broiler
Chickens |
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F.S.A. Ismail,
M.R. El-Gogary and M.I. El-Nadi |
Abstract:
The present study was carried out to investigate the effects of dietary supplementation
with vitamin E and stocking density on performance, thyroid function, plasma
concentration of corticosterone (Cort), some blood parameters, (antibody (Ab)
titers against Newcastle Disease Virus (NDV) and Avian Flu virus (AF)) and antioxidant
status in broiler chickens. In all 192; 3-day-old commercial broiler chickens
(cobb 500) were randomly divided into 8 treatments groups, each of which include
4 replicates. Experimental treatments consisted of a 4x2 factorial arrangement
design with 4 levels of vitamin E and 2 levels of stocking density (11.90 birds
m-2 as the normal stocking density or 16.66 birds m-2
as the high stocking density). Vitamin E levels were 0.0, 200, 300 and 400 mg
kg-1 diet. Increasing vitamin E level in the diet did not affect
Live Body Weight (LBW), Body Weight Gain (BWG), feed intake and FCR. Also, increasing
vitamin E levels had no effects on T4, Total Lipids (TL), total cholesterol
(Chol) and high density lipoprotein cholesterol (HDL). However, supplementing
vitamin E had a significant effect on SOD, NDV and AF titers but decreasing
effect on MDA. In addition, plasma Cort and LDL levels were lower at 300 mg
kg-1 vitamin E supplementation but plasma Total Protein (TP) and
albumin (Alb) levels were higher at 300 mg kg-1 vitamin E supplementation.
The normal stocking density has significant effects on LBW, BWG, FI, Cort, TP,
TL and chol compared with the high stocking density. However, stocking density
did not affect FCR, T3, T4, Alb, LDL, HDL and SOD. The results of the present
study show that supplementing of vitamin E at 300 mg kg-1 of diet
has a positive effect on productivity, immunity and blood parameters in broiler
chickens.
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How to cite this article:
F.S.A. Ismail, M.R. El-Gogary and M.I. El-Nadi, 2014. Influence of Vitamin E Supplementation and Stocking Density on Performance,
Thyroid Status, Some Blood Parameters, Immunity and Antioxidant Status in Broiler
Chickens. Asian Journal of Animal and Veterinary Advances, 9: 702-712.
DOI: 10.3923/ajava.2014.702.712
URL: https://scialert.net/abstract/?doi=ajava.2014.702.712
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