Horário de fornecimento de cálcio na dieta de galinhas poedeiras em ciclo final de produção

Abstract

The present experiment was conducted in the experimental aviary of the University Federal da Fronteira Sul, campus Erechim, lasting 90 days, with laying hens at the end of their production cycle. The objective was to provide different diets with different amounts of calcium for the birds. The experiment was carried out in a completely randomized design, with 40 laying hens, distributed in 12 plots with 3 animals each, distributed in 4 treatments that differed in the times of calcium supply in the diet, being respectively 4% of the two shifts (T1), 2.75% in the morning and 1.25% in the afternoon (T2), 2.0% in the morning and 2.0% in the afternoon (T3) and 1.25% in the morning and 2.75% in the afternoon (T4). Egg counts were performed throughout the experimental period, as well as the quantification of the supply and surplus of diets. Thus, the objective was to evaluate the relation production/hen/period, eggs/hen, kg of feed/hen and daily feed consumption/bird. The results were analyzed with the help of the statistical program SAS (2001), through the PROC GLM and comparison of means by Tukey's test (5%). The division of calcium supply into two periods in the diet of laying hens resulted in losses (P<0.05) in the following variables: production/hen/period; eggs/hen; kg of feed/hen. Given the above, it can be concluded that the best performance of laying hens is obtained when using similar diets in both offers.