Mês do parto e sexo do bezerro na produção e eficiência dos rebanhos
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Data
2020-09-25
Título da Revista
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Editor
Universidade Federal de Goiás
Resumo
The calving period influences productivity and reproductive
efficiency the herds. The objective of this study was to
evaluate two calving months (October and November) and
their effect on the efficiency of a breeding herd for three
consecutive years. A total of 298 Braford cows were evaluated
at three, four, and five years of age, with their calves early weaned at 148 days of age. The performance characteristics
of the cow/calf pairs were evaluated with the calving month
and calf sex as the independent variables. The animals were
kept as a single group for the three years of observation.
Cows calving in November were heavier and had a higherbody condition score at calving. Cows calving in October were heavier
and produced heavier calves at weaning. Male calves were heavier at
birth and weaning than females (30.8 vs 28.6 kg and 118.9 vs 114.7
kg, respectively). The pregnancy rate was 82.35 and 69.23% for cows
calving in October and November, respectively. Calving intervals were
shorter in cows calving in November. Cows calving in October were
more efficient compared with those calving in November, with a
higher actual fertility rate. The production of kilograms of the calf/cow
pair was higher for cows calving in October.
Descrição
Palavras-chave
Bovino, Desempenho reprodutivo, Fertilidade real, Produção de leite, Produtividade, Actual fertility, Bovine, Milk production, Productivity, Reproductive performance
Citação
VAZ, Ricardo Zambarda; LOBATO, José Fernando Piva; RESTLE, João; COSTA, Pablo
Tavares; ELOY, Lidiane Raquel; FERREIRA, Otoniel Geter Lauz; COSTA, João Luiz
Benavide. Mês do parto e sexo do bezerro na produção e eficiência dos rebanhos. Ciência Animal Brasileira,Goiânia, v. 21, n. 1, e61977, 2020. Disponível em: https://www.revistas.ufg.br/vet/article/view/61977.