Your browser doesn't support javascript.

Portal de Pesquisa da BVS Veterinária

Informação e Conhecimento para a Saúde

Home > Pesquisa > ()
Imprimir Exportar

Formato de exportação:

Exportar

Exportar:

Email
Adicionar mais destinatários

Enviar resultado
| |

Sex effect on growing and feeding efficiency in young Nellore bulls / Efeito de sexo sobre crescimento e eficiência de utilização de alimentos em animais jovens da raça Nelore

Pinheiro dos Santos, Guilherme; Figueiredo Martins Bonilha, Sarah; Noely dos Santos Gonçalves Cyrillo, Joslaine; Luiz Grion, André; Helena Branco, Renata; Geraldo Ribeiro, Enilson.
B. Indústr. Anim.; 69: 20-20, 2012.
Artigo em Português | VETINDEX | ID: vti-467100

Resumo

Several studies have reported differences between male and female cattle in growing and body composition. The differences occur mainly by hormonal factors, however, there is little information about the relationship between sex and feed efficiency traits in beef cattle. The residual feeding intake (RFI) is a feed efficiency measurement and has been an alternative to improve the profit in beef production system. It is defined as the difference between dry matter intake observed and estimated by regression in function of weight gain and metabolic body weight. More efficient animals have the intake observed smaller than the predicted (low RFI), unlike the less efficient ones have the intake bigger than predicted (high RFI). This study aimed to evaluate the sex effect (male and female) on growing and feeding efficiency traits in young Nellore bulls selected for post weaning weight. Data from males and females Nellore animals obtained during RFI evaluation tests were utilized. The tests were performed at Centro APTA Bovinos de Corte Instituto de Zootecnia - Sertãozinho-SP, between 2005 and 2011. The tests duration ranged from 56 to 112 days, with the adaption period raging from 28 to 56 days, depending of the year. At the tests beginning the animals had, on average, 286 ± 42 days of age. The traits analyzed were initial body weight (IBW), final body weight (FBW), average daily gai
O artigo não apresenta resumo em português.
Biblioteca responsável: BR68.1