Data/hora: 16/06/2024 07:35:11

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 29/07/2014
Data da última atualização: | 11/02/2015
Autoria: | ÍTAVO, L. C. V.; EUCLIDES FILHO, K.; TORRES JUNIOR, R. A. de A.; ÍTAVO, C. C. B. F.; NOGUEIRA, E.; DIAS, A. M.
Afiliação: | LUÍS CARLOS VINHAS ÍTAVO, UCDB; KEPLER EUCLIDES FILHO, DPD; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; CAMILA CELESTE BRANDÃO FERREIRA ÍTAVO, UFMS; ERIKLIS NOGUEIRA, CPAP; ALEXANDRE MENEZES DIAS, UFMS.
Título: | Efficiency of calf production of cows from two genetic groups.
Ano de publicação: | 2014
Fonte/Imprenta: | Revista Brasileira de Zootecnia, v. 43, n. 7, p. 390-394, july 2014.
ISSN: | 1806-9290
Idioma: | Inglês
Conteúdo: | The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low), distributed in a randomized-block design. The cows were placed together with Canchim bulls to generate the crossbred calves. A supplement, consisting of 200 g/kg crude protein and 820 g/kg of total digestible nutrients, was provided to the calves in creep feeding until 210 days-old (weaning). Supplement had a significant effect on the weight of the cow at calving and weaning. The average weights of the Angus-Nellore cows were 529.19 and 514.23 kg at calving and on the weaning day, respectively. These values were higher for Simmental-Nellore cows, which presented 569.60 and 542.59 kg, respectively. The male-calf weight at weaning was 254.69 kg, which was higher than the females (237.70 kg). Genetic group had no effect on weaning weight. The average weight for Canchim × Angus-Nellore calves was 243.41 kg and for Canchim × Simmental-Nellore it was 248.98 kg. Cow age affected weaning weight, promoting a linear increase of 0.804 kg in the weaning weight each year. Younger and smaller cows (Angus-Nellore) are more efficient for calf production.
Palavras-Chave: | Calf performance; Crossbreed; Efficiency.
Thesaurus Nal: | body size.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105585/1/Efficiency-of-calf-production-of-cows-from-two-genetic-groups-sbz-jul-20141.pdf
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (59060-1) - UPC - AP - PP - SP17924 -  - 17924 - DIS