Desempenho de bezerros de corte de diferentes grupos genéticos

Abstract

Brazil has continental dimensions and in recent years, the demand for beef has increased along with the size of the herd, which is mostly raised extensively, allied to the demand for higher quality meat by consumers, has influenced ranchers to seek nutritional, reproductive, breed and health management techniques. To reduce the time between birth and slaughter, producers look for alternatives such as creep-feeding, supplementing suckling calves to increase their weight at weaning, and decreasing the calving interval of cows, using techniques such as artificial insemination. in fixed time (FTAI) and breeding seasons, to obtain more uniform batches. Given this context, the objective of this work was to analyze the weight gain of beef calves, of different genetic groups and different ages, in Brachiaria spp. supplemented in creep-feeding on the private property, Fazenda São José, Realeza, in southwestern Paraná. The study included 123 male and female calves divided into the following genetic groups: 1⁄2 Angus 1⁄2 Nellore; 2/4 Braford ¼ Angus ¼ Nellore; 2/4 Brahman ¼ Angus ¼ Nellore and Nellore. The means were classified by the “F” test and the “T” test, with the SAS software, obtaining p>0.05 of significance in the comparisons of adjusted weight at 205 days and average daily gain up to 205 days between mestizos and Nelores, demonstrating that crossbred animals, regardless of the cross, are heavier, without statistical differences when comparing the average daily gain between the genetic groups during creep-feeding.