DESEMPENHO ZOOTÉCNICO NA FASE DE CRIA EM ANIMAIS MESTIÇOS (NELORE X RUBIA GALLEGA) EM REGIME EXTENSIVO DE CRIAÇÃO EM CLIMA TROPICAL NO CENTRO-OESTE BRASILEIRO

Abstract

The objective was to evaluate the zootechnical performance in the breeding phase in F1 ½ blood animals (Nelore x Rubia Gallega), in an extensive breeding regime in a Tropical climate in the Brazilian Center-West. For this, historical data from zootechnical control are being used from 500 animals, male and female, crossbred (Nelore x Rubia Gallega), from birth to weaning, under an exclusive grazing regime on Brachiaria brizantha cv. Marandu, to determine birth weight, average daily weight gain and weaning weight, as well as mortality rate. The mean and standard deviation (X ± SD) of birth weight (BW), weaning weight (PD) and yearling weight (PS) of male animals of the Nelore breed and ½ blood (Nelore grazing during the breeding and rearing phase, was equivalent to 25.4 ± 4.6 and 26.16 ± 5.1, 167.98 ± 30.98 and 204 ± 33.55, and 208.41 ± 38.43 and 268 ± 38.99, respectively. Similarly in females, it was 23.81 ± 3.4 and 24.73 ± 3.2, 147.53 ± 26.31 and 199.0 ± 29.16, and 199.63 ± 23.26 and 247 .75 ± 32.1, respectively. It is concluded that crossbred Nelore Marandu.