Farelo de vagem de algaroba na alimentação de cordeiros em confinamento

• Autor(a) principal: Mendonça, Francisco Harley de Oliveira
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1826
• topic: Alimentos alternativos; Carne ovina; Maciez; Alternative foods, Sheep meal; Tenderness; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

This thesis was developed in order to evaluate the effect of the inclusion levels of mesquite pod meal (MPM), replacing corn meal in the diets of feedlot lambs, on performance, carcass characteristics and flesh quality of the animals. A total of 30 ½ Dorper x ½ Santa Inês ram lambs were used, with an average initial weight of 18.08 ± 1.87 kg and average initial age between 4 and 6 months, divided into CRD, in four experimental treatments with six replications that consisted of inclusion levels of MPM, replacing corn with 0%, 33%, 66% and 100% in DM. After 15 days of adaptation, six animals were slaughtered for their carcass. The 24 remaining animals were housed in individual pens where they received complete diets containing 20% hay and 80% concentrate. After the experimental period of 56 days, the animals were slaughtered in refrigerator slaughterhouse. A quadratic effect was observed (P<0.05) on the intake of all nutrients. An increasing linear effect (P<0.05) was observed on the digestibility of DM, OM, CP, NDF and NFC. The final body weight of the animals, weight gain, average daily gain, feed conversion compared to the daily carcass gain, rib eye area and fat thickness were affected (P<0.05) by the replacement levels, showing a quadratic effect. The data indicated a decreasing linear effect (P<0.05) for weight neck, legs, palettes, loins and topside, hard cushion, duckling, rump, sirloin, muscle, bone and the ratio flesh:bone of the animals. However, in relative percentage values, such effect of replacement was not observed. There was no effect (P>0.05) for values of pHi, pHf, Ti and Tf, and neither for the components of the chemical composition of lamb meat quality or the physical parameters. A quadratic effect was observed (P <0.05) for the replacement levels for acids C18:0, C23:0, C17:1, C18:1n9c, C20:1, C18:2n6t, C18:2n6c, C18:3n6, C18:3n3 and C20:5n3 and the total polyunsaturated acids. There was a positive linear effect (P <0.05) for C17:0, C22:0 and C16:1 and a negative one for C18:1n9t. The replacement level of 33 % was compatible with the control diet, indicating that, at this level, it is recommended to replace the corn meal by mesquite pod meal. The inclusion of MPM in the diet of the lambs in confinement does not change the parameters of meat quality and keeps the fatty acid profile similar to the one found in the literature for sheep meat.