Exigência de lisina digestível para codornas europeias (Coturnix coturnix SP) em postura

Abstract

An experiment was carried out to evaluate the productive performance of European quails (Coturnix coturnix sp) in the production phase, fed diets containing different levels of digestible lysine. A total of 175 female, 65 day age female quail were randomly distributed in a completely randomized design with five treatments and five replicates per treatment, housed in 25 metal cages, each representing an experimental parcel with seven birds per parcel. The birds were fed the experimental rations containing 1.177, 1.217, 1.317, 1.417, 1.517% digestible lysine in each treatment and their respective replicates. The parameters evaluated were: number of eggs produced in period, laying rate, mass of eggs produced, feed intake in period, lysine intake, feed conversion per dozen and feed conversion by mass. Statistical analysis was performed for analysis of variance and, in case of significance, a regression analysis was performed. Significance was observed for egg quantity in period and posture rate with quadratic behavior, indicating higher production for the best level of digestible lysine, being 1.23%, for feed intake and lysine intake was observed increasing linear behavior and for conversion feed per dozen and by mass were observed quadratic behaviors indicating better feed conversion index when the optimal inclusion level was 1.33% and 1.404% of digestible lysine in the diet, respectively. Concluded that the requirement of digestible lysine in diets for European quails (Coturnix coturnixsp) in the production stage created in environments with high temperature and low relative humidity is 1.404% corresponding to a daily intake of 421.20 milligrams of digestible lysine.