effect of different levels of zilpaterol hydrochloride on growth performance, carcass quality and sselected blood parameters in broiler chicken
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abstract
the goal of this study was to determine the effects of ?-agonist zilpaterol hydrochloride on growth performance and carcass quality in ross broiler chicken. zilpaterol hydrochloride was daily fed at levels 0, 0.2, 0.25, 0.3 mg/kg of live body weight (lbw) from d 25 to 45 of age. eighty 308 ross female broiler chickens were employed in a 20 d feeding trial of four replicates, five birds per treatment, in a completely randomized design. birds were individually weighed on d 25 and 48 of the experiment. blood samples were collected on d 25 and 45. zilpaterol was withdrawn on d 45 and the birds weighted and slaughtered on d 48. zilpaterol hydrochloride supplementation significantly decreased the feed intake and improved the feed conversation ratio (fcr) in comparison with the control group (p
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Journal title:
علوم دامی ایرانجلد ۴۳، شماره ۱، صفحات ۵۱-۶۰
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