High-grain diet and the inclusion of residual frying oil in the feeding of lambs

Abstract In animal production, a large part of financial resources is destined to animal feed, so the use of low-cost diets with maximum production efficiency is crucial. The present study evaluated the effects of a high-grain diet and the use of residual frying oil on the productive performance and carcass characteristics of lambs. Fifteen lambs were distributed into three groups in a completely randomized design in which they were fed a control diet, a high-grain diet, or a diet with the inclusion of residual frying oil, for 40 days. There was no difference (P > 0.05) between the control and frying-oil diets regarding the daily intakes of dry matter, crude protein, mineral matter, neutral detergent fiber, or total carbohydrates. The high-grain diet reduced the intake of dry matter and nutrients, negatively affecting weight gain. The highest means for final weight, total weight, and daily weight gain were obtained with the control diet and the diet containing residual oil, which did not differ from each other (P> 0.05). Slaughter weight and hot and cold carcass weights decreased with the high-grain diet. There was an effect (P < 0.05) of frying oil inclusion on the carcass characteristics of the lambs. The diets did not affect (P > 0.05) carcass yields. The animals on the high-grain diet showed unsatisfactory production performance, with impaired carcass characteristics. The inclusion of frying oil led to greater weight gain as well as more attractive carcass characteristics, making it the most viable alternative in this research. Resumo Na produção animal, grande parte dos recursos financeiros destina-se à alimentação animal, portanto é essencial utilizar dietas de baixo custo e com máxima eficiência produtiva. O presente estudo avaliou os efeitos de uma dieta de alto grão e do óleo residual de fritura sobre o desempenho produtivo e as características de carcaça de cordeiros. Quinze cordeiros foram distribuídos aleatoriamente em três grupos e alimentados por 40 dias com uma dieta controle, dieta de alto grão ou dieta com inclusão de óleo residual de fritura. Não houve diferença (P > 0,05) entre as dietas controle e com óleo de fritura para consumo diário de matéria seca, proteína bruta, matéria mineral, FDN e carboidratos totais. A dieta de alto grão reduziu o consumo de matéria seca e nutrientes, afetando negativamente o ganho de peso. As maiores médias de peso final, ganho de peso total e diário foram obtidas nas dietas controle e com óleo residual, qu