Componentes extra-carcaça e cortes comerciais de carcaça de borregos mestiços Santa Inês terminados com três níveis de concentrado

Abstract

This study was conducted to evaluate the effect of concentrate levels on extra carcass components and retail cuts of crossbred Santa Inês lambs finished on Aruana’s pasture (Panicum maximum cv Aruana). The experiment was made with 18 lambs divided into three groups (1.25%, 2.50% and 3.75% of live weight (LW) in concentrate). The animals were kept on pasture from 8am to 5pm and got supplemented concentrate in the trough, twice a day. As soon as the animals reached 40 kg, they were slaughtered. There was no significant difference on the extra components carcass, with the following average yields: blood (4.5%), skin (6.58%), head (5.48%), feet (2.54%), empty gastrointestinal tract.(7.84%), respiratory system (1.54%), kidneys with perirenal fat (0.94%), liver (1.79%), heart (0.45%), spleen (0.16%) and omental fat (1.13%). The concentrate levels did not influence the yields of retail cuts of the first (38.71%), second (26.47%) and third (27.78%). It is recommended the use of 1.25% concentrate supplements, since the addition of concentrate can be expensive but not otherwise different from those obtained with 1.25% supplementation.