Various dietary levels of protein and energy interaction on growth performance of white plumage japanese quails

The present study was investigated to determine the optimum energy and protein requirement for growth performance and nutrient digestibility of white plumage Japanese quail during starter (1 to 3 week) and finisher (4 to 5 week) phases.: Japanese quails were fed with nine diets consisting of three levels of energy (2600, 2800 and 3000; 2800, 2900 and 3000 Kcal ME/kg) and protein (23, 25 and 27; 18, 20 and 22% CP) during starter and finisher phases, respectively, in 3×3 factorial design.Protein and energy individually had no influence on final body weight (FBW) and weight gain, while feed efficiency was significantly (P 0.05) increased.The protein × energy interaction had significant (P 0.05) effect on growth and nutrient utilization during both starter and finisher phases.The growth performance was higher (P 0.05) in quails fed on high protein-high energy (HP-HE) combination (27% CP and 3000 Kcal ME/kg) and medium protein-high energy (MP-HE) combination (20% CP and 3000 Kcal ME/kg) during starter and finisher phase, respectively in autumn season.The diet with 20% CP and 3000 Kcal ME/kg significantly (P 0.05) increased nutrients digestibility and major minerals (Ca& P) balance.energy, white japanese quail.