Desempenho produtivo e reprodutivo de vacas zebuínas e taurozebuínas, primíparas e pluríparas, no Recôncavo Baiano

Abstract

Productive and reproductive aspects in beef herd in Brazil have been the object of studying of many researchers. This activity has stood out as a profitable undertaking and now a day has attracted significative investments. It was studied the productives and reproductives performance of a bovine herd in the Recôncavo Baiano. The experiment was carried out in Grampará farm in the munipal district of Conceição de Almeida, during the period between October 1st, 2001 and March 31st, 2002. The objectives this study were to evaluate productive parameters: calf weight at birth (BW), calf weight at weaning (WW) and the ratio of these weights to the cow weight at calving (RBW), and the productive parameters: number of days between calving and the first service (DAYS1S), service period (SP) and calving interval (CI). It was used 96 matrixes, being 66 zebus and 30 Taurus x Indicus, in a completely randomized design, in a 2 X 2 factorial scheme: two genetic groups (Zebu and Taurus x Indicus) and two calving orders (primiparous and multiparous). The calving order influenced the productives rates WW and RBW and the reproductives DAYS1S, SP and CI, while the genetic groups influenced the productives rates BW and RBW and reproductives 1SDAYS. The zebu Taurus x Indicus matrixes were productively similar, however Taurus x Indicus matrixes were reproductively superior, independently of calving orders.