Características das carcaças de cordeiros alimentados com dietas contendo teores crescentes de glicerina bruta

Abstract

The objective was to evaluate the effect of inclusion levels of crude glycerin replacing corn in diets for feedlot lambs Pantaneiro on carcass traits, regional components and non-carcass components. The body condition of the animals was used as a criterion for slaughter being considered for culling animals with score 3.0. After the skinning lambs were eviscerated, and taken the weights of non-carcass components. After evisceration , carcasses were weighed to obtain the hot carcass weight , then were taken to the cooling chamber for 24 hours at a temperature of 4º C, and reweighed to obtain the weight of cold carcass and made assessments of conformation and fat state. The carcasses were cut in half, thus obtaining two half carcasses. The right half carcass were between the 12th and 13th ribs , carrying out assessments on the surface of Longissimus : loin eye area , texture, marbling , color and backfat thickness. The left half carcass was separated into sections : neck, shoulder, leg, ribs and loin. There were significant effects ( P < 0.05 ) the inclusion of levels of crude glycerin components in liver and gall bladder rumen + reticulum. For weights, cut yields and carcass characteristics not effects of adding glycerol (P> 0.05) were observed. Inclusion of crude glycerin in diets for feedlot lambs to the level of 7.5 % of total DM , does not cause changes in the characteristics of carcass and non-carcass components.