Produção de leite de quatro grupos genéticos F1 Holandês x Zebu.

Abstract

Lactation of F1 Holstein x Gir cows, Holstein x Guzera, Holstein x Azebuado and Holstein x Nellore in nine calving orders obtained from two daily milkings. They were analyzed total lactation, at initial 90 days, from 90 to 180 days, the first 180 days, from 180 days to the end of lactation the following variables: total milk production, average daily production, peak of production, peak day, production and percentage of production in the first and second milking, lactation length and percentage of total lactation. The results indicate that in F1 animals the production is greater in the first six months of lactation, with the second daily milking representing 36% of production. All genetic groups can be used in milk production, noting that yield of each genotype is strongly influenced by calving order.