Ganho de peso, característica da carcaça e dos demais componentes corporais de cordeiros confinados, alimentados com distintos teores de uréia

• Autor(a) principal: Souza, Pedro Paulo Sobolow De [UNESP]
• Data de Publicação: 2004
• Outros Autores: Siqueira, Edson Ramos De [UNESP], Maestá, Sirlei Aparecida [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-84782004000400033; http://hdl.handle.net/11449/212788
• topic: sheep; alimentation; performance; meat; ovinos; alimentação; desempenho; carne

This trial was carried out to evaluate performance, carcass traits and non-carcass components of lambs fed with a conventional diet plus other three diets with crescent levels of urea in substitution of a true protein source. 48 crossbred male lambs (Ile de France x Corriedale) weaned at 70 days of age were used. They grew and were finished in feedlot randomly allocated in four groups according to urea levels (0.0; 0.4; 0.8 and 1.2% of total dry matter). Animals were slaughtered with 32kg of live weight. There was no difference among urea levels for the following parameters: daily weight gain, live weight at slaughter, hot and chilled carcass weights, percentage of weight losses during chilling, commercial and biological carcass dressing out, non-carcass components weights, body condition and conformation, and fat deposition. However, for the skin weight (kg) the 0.0% level was lower than the 0.8% level. There were not observed differences among treatments for the following variables: muscle pH at three moments, morphometric and carcass cut proportions. The leg length of the lambs fed diet with 0.8% urea was lower than that of 0.0% level. For leg compacity, 0.8% was smaller than the leg length of those fed with 0.o% urea. It was concluded that growing levels of urea utilization is viable and did not affect the variables that were analyzed in this work.