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摘要
Objetivou-se avaliar o efeito da substitui o do milho e farelo de soja por levedura de cana-de-a 迆car e ur谷ia, sobre o consumo de nutrientes, digestibilidade e desempenho, em ovinos. Foi avaliada a inclus o de 0; 10, 20 e 30% de levedura corrigida com ur谷ia. Foram distribu赤dos, aleatoriamente, 32 ovinos castrados nos quatro tratamentos, num delineamento inteiramente casualizado. Os consumos de mat谷ria seca, mat谷ria organica, extrato et谷reo, prote赤na bruta e carboidratos totais n o foram influenciados, pela inclus o de levedura na dieta. Os consumos de carboidratos n o-fibrosos e NDTdiminu赤ram, e o de fibra em detergente neutro aumentou linearmente com a inclus o de levedura. A digestibilidade da prote赤na bruta, extrato et谷reo, fibra em detergente neutro e carboidratos totais n o foram influenciados, enquanto que a digestibilidade da mat谷ria seca,mat谷ria organica e carboidratos n o-fibrosos diminu赤ram linearmente com a inclus o de levedura. Os pesos ao abate, da carca a fria e quente, ganho de peso, rendimento de carca a fria e quente e perda ao resfriamento diminu赤ram linearmente com a inclus o de levedura.O rendimento dos cortes comerciais n o foi alterado pela inclus o de levedura. Conclui-se que a substitui o do milho e farelo de soja por levedura e ur谷ia, na dieta de ovinos, afetou negativamente o consumo de energia e o desempenho animal. This study was conducted to determine the effects of the replacement of cracked corn and soybean meal with sugar cane yeast and urea on nutrient intake, digestibility and performance of sheep. The additions of 0, 10, 20 and 30% of sugar cane yeast enriched withurea were evaluated. Thirty-two castrated male sheep were assigned to the four treatments in a completely randomized design. The results showed that intakes of dry matter, organic matter, crude protein, ether extract and total carbohydrates were not affected by sugar caneyeast. However, intake of non-fiber carbohydrates and TDN decreased, and neutral detergent fiber intake increased linearly when the level of sugar cane yeast increased. The digestibility of crude protein, ether extract, neutral detergent fiber and total carbohydratewere not affected, while the digestibility of dry matter, organic matter and non-fiber carbohydrates decreased linearly as a function of sugar cane yeast levels. Slaughter weight, hot and cold carcass weight, live weight gain and both hot and cold carcass dressingdecreased linearly as functions of levels of sugar cane yeast. The dressing of commercial cuts, as a function of cold carcass, was not affected by sugar cane yeast. It w
