Document Type : Research Paper
Authors
1 M.Sc. Student, Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Iran
2 Associate Professor, Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Iran
3 Professor, Department of Animal Science, College of Agriculture, Tarbiat Modarres University, Tehran, Iran
Abstract
In order to determine the optimal levels of energy and protein in grower diet of Japanese quail, 360 day
old Japanese quails were used in a 3×3 factorial arrangement of dietary treatments that comprised three
levels of metabolisable energy (2750, 2850, and 2950 Kcal/kg) and three levels of crude protein (24, 26
and 28 percent) with four replicates per treatment in a completely randomized design. Feed intake and
body weight were measured weekly and feed conversion ratio was calculated. At 35 d of age, four birds
(from both sexes) from each replicate were randomly selected and killed following blood sampling to
evaluate carcass traits. The blood samples were assayed for the sera concentrations of growth hormone.
Results indicated that birds fed on diets containing 2850 kcal/kg metabolisable energy and 26 percent
protein had higher daily weight gain and better feed conversion ratio and carcass yield (P<0.05). The sera
concentration of growth hormone was higher in birds fed on diet containing 2750 kcal/kg metabolisable
energy (P<0.05). This study indicated that Japanese quails can grow faster and more efficiently on diet
containing 2850 kcal/kg metabolisable energy and 26 percent protein. Therefore, the diet containing 2850
kcal/kg metabolisable energy and 26 percent protein could be recommended as dietary metabolisable
energy and protein requirements for growing Japanese quails.
Keywords
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