Administration of zilpaterol hydrochloride alters feedlot performance, carcass characteristics, muscle, and fat profiling in finishing Hanwoo steers

Title
Administration of zilpaterol hydrochloride alters feedlot performance, carcass characteristics, muscle, and fat profiling in finishing Hanwoo steers
Author(s)
최창본정근기[정근기]정기용[정기용]양병석[양병석]진구복[진구복]서성원[서성원]오동혁[오동혁]전미선[전미선]백경훈[백경훈]이상욱[이상욱]김성일[김성일]이영혜[이영혜]Yates, D.A.[Yates, D.A.]Hutcheson, J.P.[Hutcheson, J.P.]Johnson, B.J.[Johnson, B.J.]
Keywords
GROWTH-PERFORMANCE; TRENBOLONE ACETATE; MEAT QUALITY; CATTLE; AGONISTS; IMPLANT
Issue Date
201311
Publisher
ELSEVIER SCIENCE BV
Citation
LIVESTOCK SCIENCE, v.157, no.2-3, pp.435 - 441
Abstract
Forty Hanwoo steers weighing 759.3 +/- 50.3 kg were used to evaluate the effects of treatment with zilpaterol hydrochloride (ZH) in terms of feedlot performance, carcass characteristics, and fatty acid composition. We hypothesized that treatment of ZH increases meat amount in long-fed Hanwoo steers. Animals were blocked by BW, and assigned to one of two treatments within each block. Five animals were housed and fed in each of 8 pens. All animals were weighed before and after ZH treatment. Total BW gain over the 23-d period was adjusted to d 0 by covariant analysis. Steers receiving ZH (1.6 g/h/d) exhibited significantly increased weight gain (P < 0.05) over CON steers. Performance analysis showed that ZH had significant effects on total weight gained average daily gain (ADG). There were also treatment effects (P < 0.05) on dressing percentage, LM area, and yield grade. The total percentage of lean muscle was increased by the administration of ZH, and the percentage of fat was decreased by ZH treatment (P < 0.05). The weights of tenderloin, striploin, chuck, round, shank, and brisket were significantly increased by ZH treatment compared to CON steers (P < 0.05). Analyses of the physicochemical characteristics of the longissimus muscle indicated that shear force, purge loss, and cooking loss were increased with ZH treatment (P < 0.05). However, there were no treatment effects on marbling score and fatty acid compositions (P > 0.05). We conclude that the administration of ZH increased LM area and primal yield grades, but had no change in the fatty acid profile. (C) 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28456http://dx.doi.org/10.1016/j.livsci.2013.06.035
ISSN
1871-1413
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