Componentes não constituintes da carcaça e cortes cárneos de cordeiros em diferentes sistemas de alimentação

Lambs feeding have great influence on final product, lamb meat, especially due to slaughter at young age, which is the current objective on the world market. The objective of this study was to evaluate live weight components, weight and yield of cuts lamb carcasses in production systems: (1) lambs weaned around 40 days of age in ryegrass pasture (Lolium multiflorum Lam.) until slaughter; (2) lambs weaned and confined, fed with silage and concentrate "ad libitum", until slaughter; (3) lambs without weaned in the same pasture with their dams until slaughter and (4) same treatment (3), but supplemented with concentrate in creep feeding around 40 days age until slaughter. The lambs had been slaughtered at 32kg of live weight. After slaughter, the non-carcass components were collected and weighted. There were made the following cuts: shoulder, leg, loin, false and true ribs, breast and neck. Lambs weaned in pasture showed (P <0.05) higher leg yield (35.55%) and lower loin yield (10.29%) and lower weight to most of cuts. About the non-carcass components, the lambs weaned in pasture had showed higher weights of abomasum (0.268kg), small intestine (0.865kg) and digestive content (5268kg) and lower visceral fat (0.033kg) compared of the others systems. Lambs without weaning in pastures presented similar meat cuts as lambs finished in creep feeding and in feedlot. Weaned lambs in pasture presented lower cuts and limited fat deposition.