Níveis de energia metabolizável para suínos da raça piau em crescimento, criados em região de clima quente

Abstract

Objective to evaluate the influence of different levels of metabolizable energy (me) in castrated male pigs Piau breed, in growth phase I of 30 to 50 kg of body weight. 20 were castrated males with average initial landing body weight of 18.0 ± 8.30 kg. Four treatments were used with decreasing levels of metabolizable energy in the diets (2,630, 2,830, 3,030, 3,230 Kcal of metabolizable energy/kg feed) and five repetitions per treatment, in which each animal was in an experimental unit. The experimental rations used were formulated to meet the nutritional needs of animals, by varying the value of the digestible energy through the amount of corn, soybean and wheat bran contained. Statistical analysis were evaluated by analysis of variance F-test, difference applies the Tukey test. The measure of regression was used to evaluate the performance of the variables in relation to different treatments. Was evaluated by the 5% significance level of probability for all levels. All analyses were performed using R-Project version 2.13.1 software for Windows. Castrated male pigs to breed Piau, supply of feed containing 3,230 Kcal of metabolizable energy kg -1 of 30 to 50 kg resulted in higher feed intake, weight gain and lower feed conversion.