Data/hora: 17/06/2024 02:13:00

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 26/09/2007
Data da última atualização: | 18/12/2007
Autoria: | EUCLIDES FILHO, K.; RESTLE, J.; OLSON, T. A.; KOGER, M.; HARGROVE, D. D.
Afiliação: | EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS).
Título: | Measures of efficiency of calf production from cows of differente size and milking ability.
Ano de publicação: | 1983
Fonte/Imprenta: | Florida Beef Cattle Research Report, Gainesville : IFAS, 1983.
Páginas: | p.13-17.
Idioma: | Inglês
Notas: | CNPGC.
Conteúdo: | Angus (A), Brown Swiss (BS) and Brown Swiss x Angus F cows (reciprocals combined) were mated to A, BS and F1 bulls in diallel schme to produce nine breed types of calves. Calf weaning weights and estimated daily milk production of the BS dams (250 and  8,3 Kg) were superior (P<.01) those of the Angus dams (222 and 6.8 Kg).which in turn surpassed (P<.01) those of the angus dams (187 and 5.3 kg). Calves out of Angus cows had the highest (P<.01) total TDN consumption. The calf wight to cow weight ratios were essentially equal for the BS (50) and F1 (.49) cows both of  which were greater (P<.01) than that of a cows (.45). The  F and A cows did not differ (P>.05) in pregnancy rate (96 and 97%, respectively) while the BS cows at 76% were lower (P<.01). Feed efficiency values expressed as total ration TDN consumed by the group of cows and calves divided by calf weaning weight were superior (P<.01) for A cows (7.35) while those of the BS (8.91) and F1 (8.28) cows did not differ significantly for A (7.66) and F1 (8.56) cows but the value for BS cows was much higher (indicating poorer efficiency) at 12.55. Under the management conditions of this experiment weaning weight but not overall efficiency was improved through the use of crossbreeding of the Angus with alarge dairy breed, the Brown Swiss.
Palavras-Chave: | Calf; Cow; Melhoramento genetico; Pardo Suico.
Thesagro: | Bezerro; Cruzamento; Eficiência Reprodutiva; Leite; Produção; Vaca.
Thesaurus Nal: | Angus; breeding; Brown Swiss; cattle; crossbreds; milk production; reproductive performance.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (3259-1) - EMB - AP - -- - 636.05 -  - 636.05 - DIS