Artigo
Carcass characteristics of feedlot lambs fed crude glycerin contaminated with high concentrations of crude fat
Autor
Lage, J. F.
Paulino, P. V. R.
Pereira, L. G. R.
Valadares Filho, S. C.
Oliveira, A. S.
Duarte, M. S.
Souza, N. K. P.
Lima, J. C. M.
Institución
Resumen
Thirty non-castrated male lambs with 20 ± 2.3 kg average body weight (BW) were randomly assigned to five treatments consisted of different dietary concentrations of crude glycerin (CG; 0, 3, 6, 9 and 12% on
DM basis) to evaluate the effects on performance, carcass and meat quality traits. A quadratic effect was observed for performance (P = 0.04), final BW (P b 0.01) and hot carcass weight (P b 0.01). No effects of CG were observed (P > 0.05) on carcass pH neither on shear-force, cooking loss and ether extract content in longissimus. The inclusion of CG tended to reduce the Zn content in meat (P = 0.09). The data suggests that CG (36.2% of glycerol and 46.5% of crude fat) may be used in diets of finishing lambs with concentrations up to 3% without negative effects on performance and main carcass traits. Moreover, inclusion of CG seems to not affect quality and safety of meat for human consumption.