Effect of different levels of metabolisable energy and crude protein on performance, some blood parameters and carcass characteristics of Japanese quail during finishing period

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 (Coturnix coturnix japonica) during finishing period (29-49 d of age). Nine hundreds 28-d old birds were used to examine three levels of energy (2900, 3050 and 3200 kcal/kg) and three levels of crude protein (21.6, 24 and 26.4%) by a 3ˣ3 factorial arrangement in a completely randomized design with 5 replicates and 20 birds per each replicate. In the end of the experiment, two birds from each replicate were selected to measure the blood parameters (TG, total cholesterol, LDL and uric acid) and carcass characteristics. Dietary content of 3200 kcal/kg significantly improved (P0.05). Different levels of energy and protein and their interaction affected (P