High-grain diet and the inclusion of residual frying oil in the feeding of lambs
DOI:
https://doi.org/10.1590/1809-6891v24e-75158EAbstract
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.
Keywords: alternative feeds; evaluation of diets; sheep farming; small ruminant nutrition.
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