Glicerina bruta na alimentação de cabritos durante o confinamento e no descanso pré-abate

Abstract

The effects of crude glycerin supplied separately from other dietary ingredients during feedlot and lairage pre-slaughter of goats on nutrient intake, performance, behavioral and physiological parameters, and carcass and meat quality characteristics were evaluated. Twenty-eight male goats, non-castrated, from Boer with non-breed animals were used, with initial mean body weight of 16.96 ± 1.66 kg and mean age of 90 days, in a completely randomized design in a 2x2 factorial scheme, the factors being: feedlot, with the inclusion of crude glycerin and without inclusion of crude glycerin; the pre-slaughter, with the inclusion of crude glycerin and without inclusion of crude glycerin. In the feedlot, goats fed with crude glycerin had lower intake of dry matter and nutrients, as well as lower average daily gain, feed conversion and body weight. The time spent by goats on behavioral activities during feedlot and pre-slaughter was not influenced by treatments. The concentrations of albumin in feedlot, and cortisol in pre-slaughter were lower when the animals consumed the crude glycerin. Carcass weights and yields, cut weights (leg, loin, rib and palette) were higher when the animals did not consume crude glycerin. The mean final pH was 5.64, being considered normal. The use of the crude glycerin supplied alone during feedlot reduces animal performance and carcass characteristics but does not alter meat quality. Crude glycerin, as a supplement in the pre-slaughter, maintains the degree of well-being of goats.