J. Anim Sci.
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J. Anim Sci. 1971. 33:744-749.
© 1971 American Society of Animal Science
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Chemical Composition as Related to Selected Measurements used in Beef Carcass Evaluation1

R. D. Vance, H. W. Ockerman, V. R. Cahill and R. F. Plimpton, Jr.2

The Ohio State University, Columbus 43210 and The Ohio Agricultural Research and Development Center, Wooster 44691

Abstract

The right side of each of 16 beef carcasses was separated into edible portion, fat and bone. These components were separately ground, mixed and sampled for chemical analysis. Each component was analyzed for percents moisture, ether extract and ash, with protein determined by difference. Calculations were made to determine chemical composition of the entire carcass. Simple correlations were presented in an attempt to evaluate the relationships between chemical constituents of the carcass and various simplified methods used for predicting carcass composition.

Correlation analysis showed that percents carcass moisture, ether extract and protein were significantly related to percent yield of boneless, trimmed retail cuts and to external fat thickness, while no significant correlations were found between carcass chemical components and longissimus area. Percents of carcass edible portion and fat trim were highly related to total carcass protein and ether extract content, respectively, but percents separable bone and ash of the carcass were not significantly correlated. Close relationships were observed between the separable fat content of the loin and round and percent carcass ether extract. Correlations between percents moisture, ether extract and protein of the entire carcass and their respective components of the carcass edible portion were above 0.81. Chemical analysis of the rib edible portion appeared to be a good indice of total carcass chemical composition. Chemical composition of meat sawdust as obtained by sawing selected wholesale cuts was highly correlated with the composition of the carcass. Practically speaking, it appears that chemical analysis of the sawdust from either the rib or the loin would provide a good indication of total carcass chemical composition.

Footnotes

1 Approved for publication as Journal Article No. 75–70 by the Associate Director of The Ohio Agricultural Research and Development Center, Wooster.

2 Department of Animal Science.






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