DESEMPENHO DE DIFERENTES GRUPOS GENÉTICOS DE BOVINOS EM CONFINAMENTO

Abstract

The objective was to evaluate the animal performance of steers with an average of 20 months, 370 kg / LW, with three racial patterns being Nellore, ½Nellore / Angus, ½Nelore (Nellore X Zebuínos) fed with more concentrated corn silage. Assessing average daily weight gain, total weight gain and feed conversion. The animals received the diet with more concentrated silage, were raised in collective stalls with an area of 12.0 m2 per animal, in the open, with a shackle-type drinker, cement feeder with an area of 0.5 meters linear per animal. The animals were divided into three racial groups, identified by an iron and fire numbered mark on the left posterior hip in order to identify the individuals in each group. The animals were weighed and passed through a fifteen-day adaptation. The diet consisted of 57.25% corn silage and 42.75% concentrate. After 100 days of confinement, the batches were removed for subsequent slaughter and weighing of their carcasses. The design used was DIC with comparisons between the means of the variables analyzed by the Tukey test at 5% significance. It was observed that the ½ Angus / Nellore animals showed a statistically better total weight gain compared to other genetic groups with a value of 178.43 kg.