Silagem de sorgo sacarino na alimentação de cordeiros confinados: componentes da carcaça, não carcaça e teciduais

Abstract

The objective of this work was to evaluate the carcass, non - carcass and tissue components of lambs fed with two sorghum sacarine silages (BRS 506 and BRS 511) compared to forage sorghum and maize silages. Twenty Suffolk lambs, not castrated, averaging 75 ± 15 days, mean initial weight 21 ± 7 kg and mean slaughter weight of 34.2 ± 3.6 kg, were fed a 50% voluminous diet and 50 % concentrate. The experiment was conducted in a completely randomized design, with four treatments (silages) and five replications per treatment. The silages of forage sorghum, sorghum BRS 506, sorghum BRS 511 and maize silage were tested. After slaughter and skinning the carcasses were cooled to controlled temperature in a cold room at 4 ° C for 24 hours. The cooled carcass was weighed and the visual evaluation of the fattening status of the carcasses was carried out, when they were sectioned in the middle, with the aid of an electric saw, in a longitudinally symmetrical manner. In the left half carcass, a cross section was made on the longissimus lumborum muscle, between the 12th and 13th ribs, for subjective evaluations of texture, marbling and flesh color on its surface, which was later separated into commercial cuts: shank, bass, neck and tail, and then weighed individually by weight and yield. The leg cut was dissected to obtain the tissue composition. Only blood 1,76 kg and liver 0,57 kg values showed higher values for maize silage (P> 0.05). It was concluded that the animals presented similarities in the carcasses independent of the silage provided, indicating positive for the use of sorghum sacarine silage in feeding lambs for termination.