Desempenho produtivo de frangos de corte, criados no Semiárido Paraibano submetidos a diferentes níveis de proteína e energia na dieta.

Abstract

The objective of this study was to evaluate the performance of broiler chickens, submitted to different levels of protein and metabolizable energy in the diet. 450 animals were used in a DIC in factorial 3x3 (metabolizable energy and crude protein levels) with five replications and ten birds per experimental plot, totaling forty-five experimental units. From 1 to 7 days (pre-starter) were 21.20; 22,20 and 23.20% crude protein and 2900, 2950 and 3000 kcal metabolizable energy, in 8 to 21 day phase (Initial) were used 19.80; 20.80 and 21.80% crude protein and 2950, 3000 and 3050 kcal / kg metabolizable energy, in 22 to 35 days of age (Growth) 18.50; 19,50 and 20,50% crude protein and 3050, 3100 and 3150 kcal metabolizable energy, at 36-42 days of age (Final) were used 17.50; 18,00 and 18,50% crude protein and 3100, 3150 and 3200 kcal metabolizable energy. It is recommended for the formulation of broiler diets created in semi-arid Paraiba, the use of 23.20% crude protein and 2950 kcal metabolizable energy during pre-initial phase, 21.8% crude protein and 3050 kcal metabolizable energy during the initial phase, 20.5% crude protein and 3150 kcal metabolizable energy during the growth phase and 18% crude protein and 3100 kcal metabolizable energy during the final phase.