Effect of different levels of zilpaterol hydrochloride in two days on-two days off feeding program on performance, carcass quality and blood metabolites in Japanese quails

Document Type : Research Paper

Authors

1 MS.c student, Department of Animal Science, Faculty of Agriculture Science and Engineering, University of Tehran, Karaj, Iran

2 Associate Professor, Department of Animal Science, Faculty of Agriculture Science and Engineering, University of Tehran, Karaj, Iran

3 Professor, Department of Animal Science, Faculty of Agriculture Science and Engineering, University of Tehran, Karaj, Iran

Abstract

The purpose of this study was to evaluate the effect of zilpaterol hydrochloride in two days on-two days off
feeding program on performance, carcass quality and blood metabolites of Japanese quails. One hundred twenty
eight, 26 days old male quails were assigned to four experimental groups with four replicates of 8 birds each.
Diets were based on corn and soybean meal in finisher period (24% cp and 2900 kcal/kg of diet). The birds were
supplemented daily with 0, 0.2, 0.225, or 0.25 mg of zilpaterol/kg of live weight. On day 47, 2 birds from each
replicate were randomly selected for bleeding. After three days of zilpaterol withdrawal period (on day 50), two
birds were slaughtered for carcass quality evaluation. Data were analyzed using the GLM procedure of SAS
software. Zilpaterol hydrochloride supplementation significantly improved feed conversation ratio compared to
the control group (P<0.05), while its effect on feed intake and weight gain were not significant (P>0.05). Carcass
quality, (relative weights of legs, breast, liver, and fat pad) was not affected by Zilpaterol hydrochloride.
Zilpaterol hydrochloride supplementation increased plasma glucose concentration compared to the control
group, but it had no effect on plasma cholesterol and triglyceride concentrations.

Keywords


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