Características da carcaça e qualidade da carne de cordeiros Pantaneiros alimentados com teores crescentes de glicerina bruta

Abstract

RESUMOObjetivou-se avaliar o efeito da inclusão de glicerina bruta (GB) em substituição ao milho, na dieta de cordeiros Pantaneiros confinados, sobre as características da carcaça e qualidade da paleta e do pernil. Foram utilizados 24 cordeiros machos, não castrados, em delineamento inteiramente casualizado, com quatro tratamentos (0, 2,5, 5,0 e 7,5% de GB em base da MS). Não houve efeito da inclusão de GB sobre os não componentes de carcaça. Houve efeito quadrático para peso de carcaça quente, com menor valor para 2,5% de GB. A composição regional e tecidual da carcaça não foi alterada pela substituição do milho pela GB. A composição tecidual da paleta e pernil e as características instrumentais da paleta não foram afetadas pelos teores de GB. Houve efeito quadrático para a intensidade de amarelo do pernil, com maior valor para 5,0% de GB. O teor de extrato etéreo da paleta apresentou efeito linear decrescente. Pode-se recomendar a utilização de 7,5% de GB, na matéria seca, em substituição ao milho, sem alteração das características da carcaça e qualidade da carne.Palavras-chave: área de olho de lombo, confinamento, coproduto, glicerol, nutrição, ovinos SUMMARYThe objective was to assess the effect of inclusion of crude glycerin (CG) replacing corn in the diet of feedlot Pantaneiro lambs on the non-carcass components, regional and tissue composition, and carcass traits. Were used 24 not castrated males, in a completely randomized design with four treatments (0, 2.5, 5.0 and 7.5% of CG on DM basis). There was no effect of GB inclusion on non-carcass components. There was a quadratic effect for hot carcass weight, with lower value to 2.5% of CG. Regional and tissue composition of the carcass was not affected by the substitution of corn by CG. The tissue composition of shoulder and leg and instrumental traits of the shoulder were not affected by CG. There was a quadratic effect for the yellowness of the leg, with high value for 5.0% of GB. The ether extract content of shoulder showed decreased linear effect. The use of 7.5% of CG, in dry matter, can be recommend to replace corn of feedlot diets, without changing carcass traits and meat quality.

Discrimination study between the carcass and non-carcass components for interaction between gender, age, and production system in indigenous sheep

“…Although the stages did not differ in this parameter, the results showed LEA of 16.5 and SFT of 0.9 cm for lambs, LEA of 14.8 and SFT of 2.8 cm for wethers; and LEA of 14.4 and SFT of 3.7 cm for cull ewes. In the current study the mean loin eye area (LEA) was 15.3 cm², which is similar to that found by Vargas et al (2014) and higher than those reported by Cunha et al (2016). The LEA differ from lambs to cull ewe.…”

“…The carcasses were weighed after evisceration to obtain the warm carcass weight (WCW) and warm carcass yield (WCY=WCW/ BW × 100) and transferred to a cold room at 4ºC for 24 hours. The cold carcass weight (CCW), cold carcass yield (CCY=CCW/ BW * 100) and weight loss by cooling (WLC = (WCW-CCW/WCW)*100) were obtained according to the methodology described by Cunha et al (2016). After slaughter, the carcasses were stored in a cold room at 4ºC during 24 hours.…”