Growth performance, carcass characteristics and meat quality of finishing bulls fed crude glycerin-supplemented diets

This study was conducted to evaluate the performance, carcass characteristics and chemical composition of Longissimusmuscle (LM) of the bulls. Twenty-four Nellore bulls were used in a complete randomised design. The bulls were randomly assigned to one of the three diets containing 0, 5 or 12% glycerin. Final BW and ADG were similar (P&gt;0.05) between the bulls fed with 5 or 12% of glycerin but were higher (P<0.10) compared to the bulls fed without glycerin. DMI and feed efficiency was not affected (P&gt;0.05) by glycerin level. Hot carcass weight increased (P<0.10) when glycerin was fed at 5%. Glycerin level did not affect (P<0.05) the dressing percentage and fat thickness. LM increased (P<0.10) when glycerin was fed at 12%. Dietary glycerin did not affect (P&gt;0.05) the conformation, colour, texture, marbling and pH. There was difference (P&gt;0.05) for moisture, ashes and crude protein among glycerin levels. Bulls fed 12% glycerin present the highest (P<0.03) total lipids on LM. The percentage of saturated fatty acids (SFA), monounsaturated acids (MUFA), polyunsaturated acids (PUFA), n-6 and n-3 fatty acids and PUFA/SFA and n-6:n-3 ratios of the LM were similar among the diets. In conclusion, glycerin level did not affect the animal performance and carcass characteristics of Nellore bulls finished in feedlot.

Bibliographic Details

Main Authors:	Françozo,Mônica Chaves, Prado,Ivanor Nunes do, Cecato,Ulysses, Valero,Maribel Velandia, Zawadzki,Fernando, Ribeiro,Ossival Lolato, Prado,Rodolpho Martin do, Visentainer,Jesuí Vergílio
Format:	Digital revista
Language:	English
Published:	Instituto de Tecnologia do Paraná - Tecpar 2013
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200019
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