Effect of Different Dietary Levels of Energy and Protein on Performance of Japanese Quail During Grower Phase

This research was conducted to investigate the effect of different levels of metabolisable energy and crude protein on performance, carcass characteristics and blood parameters of Japanese quail during grower phase (14-28 d of age). Nine hundreds 14-d-old male birds were used to examine 3 levels of energy (2900, 3050 and 3200 Kcal of ME/Kg of the diet) and 3 levels of protein (21.6, 24 and 26.4% CP) by a 3*3 factorial arrangement in a completely randomized design with 5 replicates of 20 birds. Feed intake, weight gain and feed conversion ratio (FCR) were measured during whole period. At the end of the experiment, 2 birds from each replicate were selected to measure the blood parameters (TG, total cholesterol, LDL and uric acid) and carcass characteristics. The lowest and highest levels of energy and protein enhanced (P0.05), however, FCR was improved by the diets of 3050 and 3200 Kcal ME/Kg compared with that of 2900 Kcal ME/Kg. Energy and protein interaction was significant (P