Influence of Different Levels of Crude Protein and Metabolizable Energy on Production Performance of Ross Broiler

摘要

The objective of this study was to estimate the suitability of recommending Ross guide requirements of crude protein (C.P) and metabolizable energy (M.E) during the starter and finisher stages as compared with low and high amount of these nutrients at basrah region. Four treatment with three of 15 ROSS broiler chicks per replicated were used. The treatment were fed diets 1, 2, 3 and 4 which were contented 22, 23 % C.P (as ross guide recommended), (24, 25) % C.P and 2864, 2990 Kcal M.E/kg (as Ross guide), (3120 and 3207) Kcal M.E/kg diets respectively for the starter and 18, 19 % C.P (as Ross guide), 20, 21 % C.P and 2886, 3041 Kcal M.E/kg (as Ross guide), (3204, 3357) Kcal M.E/kg diet for the finisher period respectively, The ratio between M.E and C.P in these diets treatments were equal to 130 the starter diets and 160 to the finisher diets. Live body weight, weight gain, feed consumption, C.P and M.E consumption, production index, dressing percentage, thigh and Brest percentage high significantly (p0.05) and low in the feed conversation ratio, abdominal fat and the gizzared percentage were reputed in treatment 3 as compared with treatments 1, 2 and 4 it can be concluded that diet contented Ross guide requirement of C.P and M.E were not fit enough of these nutrients to give better performance in basrah region.