Características de carcaça de caprinos terminados em pastejo e suplementados com diferentes relações concentrado: feno de Malva Branca (Sida cordifolia).

Abstract

The experiment was conducted at the University Federal of Campina Grande (UFCG) campus Patos / PB. 24 goats were used, not castrated, averaging 20 kg of body weight (BW). The feeding system consists of grazing from 8:00 to 16:00, when it was collected to the stalls to receive supplementation. The experimental area was 2,4ha, divided into four paddocks of 0,6ha, provided with shelter and water cooler, and every other day the animals were changed picket. The supplement based concentrate was formulated to meet a requirement for ganho150g / day for goats 20 kg LW supplied in a proportion of 1.5% BW, whereas 50% of the diet would be provided by the pasture. Treatments consisted in replacing the concentrate at 0%, 10%, 20% and 30% of white mallow hay. By completing 75 of experiment, the animals were caught and slaughtered obtaining live weight at slaughter (PVA). Were gutted, removed the head, fur, paws, respiratory tract, gastrointestinal tract, and other non -housing constituent, obtaining the hot carcass weight (HCW). The gastrointestinal (GI) tract was weighed full and empty, as well as bladder and gallbladder, to obtain the empty body weight (EBW). After casting cooling period was obtained cold carcass weight (CCW). With these mentioned weights were estimated income from caraça also weighed the organs and viscera, to estimate the weight and the income from them. The left housing divided into: neck, shoulder, ribs, loins and legs that were dissected into subcutaneous fat, intermuscular fat, bone, muscle and other tissues. The design was completely randomized, with four treatments and six replications. The substitution provided housing similar weights, but with lower yields. Introducing the head, tongue, rumen and spleen with higher yield. It did not affect muscle income cuts except the neck decreased and only the fillet had its weight reduced by substitution. The sidecut of fat and loin were reduced in weight and yield, however the palette fat only varied as the absolute weight. To obtain carcasses with lower proportion of fat in the commercial cuts, leg, loin, shoulder and sidecut and equal ratio of muscl e any of the replacement levels can be recommended for crossbred goats (Boer X SPRD) finished in thinned caatinga and enriched with grass buffel.