Tissue composition of commercial cuts of lambs fed Cenchrus ciliares L. and Mimosa tenuiflora

Abstract

This study aimed to evaluate the tissue composition of lambs Santa Inês commercial cuts fed different proportions of buffel grass hay (Cenchrus ciliarisL.) and Jurema Preta (Mimosa tenuiflora(Willd.) Poiret).Used 28 male sheep, uncastrated, body weight 20 ± 2.49 kg. The treatments consisted of different proportions of buffel grass hays (BGH) and jurema preta (JPH) in the massive portion of the diet: 0% of JPH + 100% of BGH; 33% of JPH + 67% of BGH; 67% of JPH + 33% of BGH; 100% of FJP + 0% of BGH. The slaughter was carried out after 65 days of experiment, to obtain housing. The left half carcass was divided into commercial cuts: neck, shoulder, ribs, loin and leg, which were dissected into bone, muscle and fat. The variables analyzed were: weight of cuts the neck, palette, ribs, loin and leg, as well,as weight and yield of its tissue constituents: subcutaneous fat, intermuscular fat, total fat, muscles, bones, relation muscle:fat, relation muscle:bone and relation bone:fat. The completely randomized design with four treatments and seven replications, and the data submitted to analysis of variance and regression, where the level of 5% probability. There was a quadratic effect on the inclusion of hay jurema preta in the neck weights, rib, loin, legand muscle/fat and decreasing linear effect for shoulder. It follows that to obtain suitable housing with fat yield, without changing the proportion of muscle in commercial cuts recommended proportions of 20 to 45% of the voluminous portion.