Caracterização do peso corporal de vacas F1 Holandês x Zebu e seu efeito na produção e reprodução

Abstract

This study aimed to characterize the weight and its influence on the reproduction of crossbred Holstein x Gir cows, Holstein x Guzerat cows, Holstein x Azebuado cows and Holstein x Nellore ones in nine calving orders. They were analyzed the calving weight, fertile mating weight, notlactating period weight, the correlation between the weights, the days open and lactation length. The correlation between the weights is from moderate to high. The animals of Guzerat and Nellore base are heavier at calving, the fertile mating and drying. The calving order influences the weight to calving, to mating and to drying. The days open is longer in the first calving orders and it is influenced by the genetical group. The behavior of the weight during lactation is influenced by maternal base and calving orders. The lactation length is longer in firsst order calving of F1Holstein x Gir and Holstein x Azebuado animals.