Desempenho de codornas alimentadas com diferentes níveis de energia e proteína no semiárido.

Abstract

This study aimed to identify the levels of energy and protein and the possible interactions of these nutrients on performance of European quails reared in high temperatures . 360 mixed European quails were used , 1-21 and 21-42 days of age and verified the performance variables feed intake ( FI), weight gain ( WG) and feed conversion (FC ) were held weekly . The levels of protein and energy were used in the initial phase ( 1 to 21 days of age) were 23 , 24 and 25% PB 2900, and 3000 kcal / kg and for the final stage (22 to 42 days) levels used were 20 , 21 and 22% CP and 3050 and 3150 kcal / kg ME , respectively. The experimental design was completely randomized in a 2 x 3 factorial arrangement , two and three energy levels of crude protein with five replications and twelve birds per unit , totaling 30 experimental plots . Estimates of the levels of protein and energy were established through the models of medium and Tukey at 5% significance tests . Analyzing the average CR , GP and CA for the initial phase , it appears that the levels of protein and metabolizable energy recommended for the initial phase in the period 1-21 days of age , for the best performance was obtained with 25 % CP and 2900 in the diet . For the final phase of 22 to 42 days and is recommended 21 % CP and 3150 kcal / kg in the diet of European quail created in semiarid Paraiba.