Iranian Journal of animal Science

Iranian Journal of animal Science

Effect of Different Levels of Zilpaterol Hydrochloride on Growth Performance, Carcass Quality and Sselected Blood Parameters in Broiler Chicken

Authors
hasan kheirkhah
armin towhidi
hossein moravej
mola mohammadi
10.22059/ijas.2012.24909
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 Zilpaterol was withdrawn on d 45 and the birds weighted and slaughtered on d 48.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<0.05). Treatment with 0.25 Zilpaterol hydrochloride led to the most appropriate FCR value (P<0.05). The effect of Zilpaterol hydrochloride on weight and carcass yield was not significant (P>0.05). Zilpaterol hydrochloride significantly affected plasma glucose and cholesterol concentration (P<0.05), and induced an increase in tissue protein along with a decrease in tissue fat of leg samples (P<0.05). It is finally concluded that Zilpaterol hydrochloride can improved boiler performance as well as its meat quality.
Keywords
Beta-adrenergic
Broiler Chicken
Carcass Quality
Growth performance
Zilpaterol hydrochloride