Optimization of Crude Protein, Metabolized Energy, Lysine and Methionine Requirement for Commercial Broilers Reared Under Open Sided Housing System in Hot Weather Condition

Abstract

The biological experimental was conducted to optimize the crude protein, metabolized energy, lysine and methionine requirement for broilers in summer season (hot weather condition) under open sided deep litter system feeding with different levels of composition of metabolized energy, crude protein, lysine and methionine for broilers. The sex separated, day-old commercial broiler chicks (Vencobb 430) were used for the experimental study. Six weeks data was collected on production performance parameter like body weight and were calculated. The results showed that there was a significant difference (P<0.05) on mean body weight (g) of commercial broilers from first to sixth week of age. Comparatively the group T₉ recorded higher mean body weight (2502.43g) which did not differed significantly among other treatment groups except T₆ group. The T₉ group recorded significantly higher mean body weight (2502.43g) than the other treatment groups. Other treatment groups recorded intermediary body weight was fed with broiler pre-starter feed with 2900 kcal/kg of ME and 23% CP, 1.30% lysine and 0.80% methionine, broiler starter feed with 3000 kcal/kg of ME and 22% CP, 1.20% lysine and 0.70% methionine and broiler finisher feed with 3100 kcal/kg of ME and 21% CP, 1.10% lysine and 0.60% methionine This indicated that the summer had influenced the cumulative low feed consumption irrespective of different levels of combinations of Crude protein, metabolized energy,  lysine and methionine to the commercial broilers with higher environmental temperature (38.6⁰C) than the required one to the broilers which is resulting in lower feed intake. Hence, it is advised to formulate the feed for broilers with 2900 k.cal/kg M.E and 23% CP., 1.30% lysine and 0.80% methionine in the pre-starter feed, 3000 k.cal/kg M.E and 22% C.P., 1.20% lysine and 0.70% methionine in the starter feed and 3100 k.cal/kg M.E and 21% CP., 1.10% lysine  and 0.60% methionine in the finisher feed. Subsequently, it may be concluded that for getting better result and  profit, in summer season (hot weather condition) broilers reared under open sided deep litter housing system that the broilers requires 1% excess crude protein, 0.20% excess methionine and 1% excess lysine.