Características de carcaças de cordeiros confinados suplementados com niveis crescentes de óleo de copaiba (Copaifera sp.) na dieta

Abstract

The experiment was carried out at the Campus of the Federal University of Grande Dourados. The objective of this experiment was to evaluate different proportions of copaiba oil in the feed of confined, male mongrel lambs of Santa Inês breed, in order to qualify the composition of the carcass obtained. Thirty animals were used, with mean age of 8 months and mean body weight of 22kg. The treatments evaluated were as follows: T1 - 25 mg / kg MS-1 inclusion of monensin T2 - 0 mg / g inclusion of monensin / copaiba oil (control); T3 - 0.5g inclusion of copaiba oil; T4 - 1.0g inclusion of copaiba oil and T5 - 1.5g inclusion of copaiba oil. The experiment was developed from February to May 2014. The voluminous: concentrate ratio was 53:47. Grass hay of the genus Cynodon spp. (Jiggs, Tifton 68 and Tifton 85) as bulky. The randomized block design was randomized with 6 (six) replicates per treatment using the covariant, initial weight. Analyzes of pH, colorimetry, water retention capacity (CRA), weight loss by cooking (PPC) and shear force (HR) were performed; And centesimals of moisture, protein, ethereal extract and mineral matter. For the evaluations were collected from the left half-carcass, the Semimembranosus (SM) and Gluteobiceps (GB / pernil) muscles; The Longissimus dorsi muscle (LD / loin) and the Triceps brachii muscle (TB / palette). Measured thickness of fat cover, external and internal length of the carcass, leg length, leg width, leg depth, chest depth, croup perimeter, sternum fat thickness. It is concluded that the inclusion of copaiba oil in the diet of lambs did not influence any of the evaluated parameters of the lamb meat quality, it is possible to use it as an alternative substitution of monensin.