Comparison of the effects of using Sumac powder (Rhus coriria. L) and vitamin E on body and internal organs weight, biochemical parameters and meat quality in broiler chickens after the stress induction by dexamethasone
2017
Hosseini Siyar, S. A. | Farahavar, A.
The aim of this study was to investigate the effect of adding Sumac powder and vitamin E to diet on body and internal organs weights, biochemical and meat quality parameters in broiler chickens after the stress induction by dexamethasone (DEX). Ninety-six male broiler chickens were divided to six groups and received a basal diet for 35 days. After 10 days of age, basal diets of 4 groups was supplemented with Sumac powder (0.25, 0.5 and 0.75 %) and vitamin E (20 mg/Kg). At the same time, two groups were assigned as negative (without DEX) and positive (with DEX) controls. At 28 days of age, all broilers except negative control received DEX (2mg/kg BW). At end of the experiment, chickens were weighed, slaughtered and their blood samples were collected. Dexamethasone reduced (P<0.05) final body weight, relative weights of carcass, Breast, Spleen and Bursa (1432.80, 59.40, 21.86, 0.07, 0.035, respectively), compared to negative control (1783.67g, 60.32, 22.98, 0.121, 0.051, respectively) and increased (P<0.05) relative weights of Liver, Heart, Proventriculus and Gizzard, shear force, total protein and cholesterol (3.08, 0.49, 0.45, 1.95, 0.836N, 5.45 and 255.45 mg/dl), comparing to negative control (2.55, 0.42, 0.36, 1.58, 0.375, 4.45 and 179.32 mg/dl). Meat shear force in 0.5% and 0.75% of Sumac powder groups (0.452 and 0.428N respectively) decreased (P<0.05) relative to positive control (0.836N). In conclusion, adding vitamin E and Sumac powder to diet did not prevent the weight loss induced by DEX and blood parameters were not affected. However, 0.5% and 0.75% of Sumac powder reduced shear force.
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