Desenvolvimento dos pré-estômagos e estômago de bezerros Jersey alimentados com altos níveis de leite

Abstract

Thirty-two Jersey calves between 0-90 days old were assigned in four diets, which differed as milk quantity supplied (15%, 20% and 25% of birth body weight (BBW)) equivalent) and the alfafa hay inclusion to calves receiving 20% of milk. Were evaluated the dry matter intake (DMI) to all period for male animals and the DMI from 60 to 90 days old to female calves. The males were euthanized with 60 days old, while that female remaining in the experiment until 90 days old. Between 60-90 days, female were feed with ad libitum alfafa hay and concentrate equivalent to 2% BW. The forestomach were dissected, weighed and measured. In relation to the total volume of the four gastric compartments the rumen held respectively 63.39%; 60.20%; 59.62% and 55.24%; in treatments 1, 2, 3 and 4. No differences were observed (p > 0.05) between treatments for DMI and volumetric measurements of pre-stomachs. The DMI including milk by males followed the tended to the traits. The female BW at 90 days old were higher to animals receiving greater milk. The findings indicate there is no damage for the pre-stomachs development with large volumes of milk supplying to the calves. The hay intake did not improve the forestomach development. High milk quantities did not affect the female growing post weaning.