Effect of different dietary protein and energy levels on the growth performance,meat and body fat composition in broiler chicks

The aim of modern poultry enterprise is to reduce feed cost for optimal economic returns because feed constitutes approximately 70% of the total production cost. one of way to reducing the feed cost is improvement in the feed efficiency of birds. while formulating a broiler’s diets,main emphasizes are placed on metabolize energy (me) and crud protein (cp),because me itself comprises 70% of the total cost of feed and protein have major cost components in broiler diets. thus the present study was conducted to evaluate the performance of day old broiler chicks on various dietary proteins and energy levels for 35 days. a total of 2250,day old broiler chicks were divided into three groups having six replicates each. three experimental diets; a,b and c formulated for starter phase contained 21.92,21.35 and 21.35% cp and 3090,3090 and 3034 kcal/kg me,respectively. for finisher phase,a,b and c diets contained 20.79,20.22 and 20.22% cp and 3118,3118 and 3062 kcal/kg me,respectively. with diets a,b and c overall weight gain remained 1376.29,1364.61 and 1388.24 g/bird; feed intake was 2959.70,2940.20 and 2991.64 g / bird and feed: gain ratio remained 2.15,2.15 and 2.15,respectively. the results showed non-significant (p<0.05) effect of nutrient variability in diets on all growth parameters in birds. it was concluded that reducing cp by 0.50% in combination with 50 kcal/kg me gave better results in terms of cost of production and profit. © 2015,university of agriculture. all rights reserved.