In a 4×4 factorial experiment, one day old 400 nondescript indigenous chicks of Assam were fed on 16 experimental diets for 12 weeks. Sixteen experimental rations were formulated with 21, 22, 23 and 24 crude protein (CP) each at energy level of 2500, 2700, 2800 and 2900 Kcal ME/Kg. Average body weight ranged from 453.89±22.69g to 695.88±22.69 at 12 weeks of age. Body weight was significantly (P<0.01) influenced by dietary energy levels and protein × energy interactions, but not by dietary protein levels. However, weight gain improved as the level of protein increased in the diets. Feed consumption was lower (P<0.01) at 2900Kcal ME/kg than at 2500,2700 or 2800 Kcal ME/kg. Feed conversion efficiency ranged 4.60 to 7.63 and it was significantly (P<0.05) influenced by dietary energy levels and protein energy interactions but not by dietary protein levels. Protein efficiency ratio ranged from 0.60 to 0.94 and it was significantly (P<0.01) influenced by dietary protein and energy levels but not by protein × energy interactions. Energy efficiency ratio was significantly(P<0.01) higher at 2900 Kcal ME/kg than at 2500, 2700 or 2800 Kcal ME/kg. Performance index was significantly (P<0.05) influenced by dietary energy levels only. Cost of feeding was lowest on ration containing 24% CP and 2700 Kcal ME/kg. It was concluded that diet containing 24% CP and 2700 Kcal ME/kg performed better as compared to other diets.
Indigenous, Chicken, Assam, Growth, Protein, Energy
