Desempenho e características de carcaça de cordeiros alimentados com dietas ricas em ácidos graxos poli-insaturados associadas a diferentes tipos de carboidratos

• Autor(a) principal: Soares, Rafael Lopes
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/123456789/14379
• topic: Ganho de peso; Produção de ovinos; Rendimento de carcaça; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL

The objective of this study was to evaluate the productive performance, carcass characteristics and non carcass components of lambs fed with different proportions and types of carbohydrates. Thirty sheared sheep with no defined racial pattern were used, with a mean body weight of 20.5 ± 7.6 kg, with 5 months of age, distributed in a randomized complete block design. The diets consisted of: High Diet CNF (High proportion of non-fibrous carbohydrates); Low diet CNF (Low proportion of non-fibrous carbohydrates) and High diet CNF + cactus (High proportion of non-fibrous carbohydrates and forage cactus). The animals were weighed for performance evaluation. Samples of leftovers and faeces were collected for the evaluation of the bromatological analyzes. The DMI and nutrients intake, performance, carcass characteristics and non-carcass components were evaluated. The consumption of DM and nutrients presented a difference in relation to the diets, except for intake of DM by metabolic live weight, intake of DM by live weight and total carbohydrate intake. For digestibility, only neutral detergent fiber values were not significant. The performance variables showed better results for the diets High CNF and High CNF + cactus. Evaluating the carcass characteristics related to the weights, only renal fat, warm carcass yield, biological yield, cooling losses and loin eye area did not differ. For the yields, only the cold carcass yield presented a significant difference, where the diets High CNF and High CNF + cactus were superior. The weight of the commercial cuts differed, however, only the perch yield showed a difference. The tissue composition did not present different results for semitendinosus weight, pelvic fat and femur length. Their yields varied only for bone yield, total fat, bone, and leg muscle index. The parameters of non-carcass components when evaluated organ weights presented higher averages for the diets High CNF and High CNF + cactus, except for tongue and heart. The same diets showed higher means for weight of “Buchada” and “Panelada”. It was concluded that high proportions of non-fibrous carbohydrates can be used to feed lambs in confinement, promoting better results.