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vol.35 issue5Physical composition of carcass and qualitative characteristics of meat of young bulls from different breed fed diets with different energy levelsPerformance and carcass characteristics of feedlot Nellore fed diets containing sugarcane bagasse and different energy sources author indexsubject indexarticles search
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Revista Brasileira de Zootecnia

Print version ISSN 1516-3598On-line version ISSN 1806-9290

Abstract

COUTINHO FILHO, José Luiz Viana; PERES, Roberto Molinari  and  JUSTO, Célio Luiz. Meat production in feedlot Santa Gertrudis young bulls and heifers fed finishing diets. R. Bras. Zootec. [online]. 2006, vol.35, n.5, pp.2043-2049. ISSN 1516-3598.  http://dx.doi.org/10.1590/S1516-35982006000700023.

Economic and animal performance of feedlot beef young bulls and heifers fed finishing diets were evaluated in this trial. Twenty-eight Santa Gertrudis bovines (14 young bulls and 14 heifers) were assigned to a completely randomized design and maintained in individual pens. Diets were formulated to fulfill the weight gain requirements of finishing animals. The measured variables were affected by sex. Daily weight gain (DWG), feed conversion, carcass yield, and dry matter (DM) intake were: 1.80 and 1.22 kg/day, 5.61 and 7.18 kg DM/kg DWG, 55.61 and 52.75%, and 10.08 and 8.87 kg/day, respectively, for young bulls and heifers. Males had greater carcass yield but females showed higher proportion of beef round as well as the main commercial cuts. According to an economic analysis, the cost to produce 15 kg of carcass was R$33.95 for young bulls and R$37.02 for heifers.

Keywords : carcass composition; concentrate; heifers; weight gain; young bulls.

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