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J. Anim Sci. 1971. 33:355-361.
© 1971 American Society of Animal Science
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Effects of Digestible Protein to Digestible Energy Ratio Diets on Quantitative and Qualitative Carcass Composition of Beef1

R. J. Epley2, H. B. Hedrick, W. L. Mies3, R. L. Preston4, G. F. Krause and G. B. Thompson

University of Missouri, Columbia 65201

Abstract

The relationship between protein and energy requirements has been discussed by Cramp ton (1964). It is dear that protein requirements have little meaning unless energy requirements have been considered or satisfied. Several workers have chosen to express these nutrient requirements in terms of protein: energy ratios. Protein: energy studies have been conducted with rats (Forbes et al., 1935; Forbes et al., 1938; Pol and Hartog, 1966), chicks (Leong et al., 1955; Matterson et al., 1955; Donaldson, Combs and Romoser, 1956; Sunde, 1956; Combs, 1964), pigs (Clawson et al., 1962) dairy calves (Brown and Lassiter, 1962; Gardner, 1968) and lambs (Preston and Burroughs, 1958). Preston (1966) published some theoretical aspects of protein requirements of growing-finishing beef cattle.

The objective of this investigation was to determine the effects three digestible protein (g): digestible energy (Meal) ratio diets had upon various quantitative and qualitative carcass characteristics of beef.

Forty-two Hereford steers were used in this experiment.

Footnotes

1 Contribution from the Missouri Agricultural Experiment Station Journal Series No. 6083. Approved by the Director.

2 Present address: Department of Animal Science, University of Minnesota, St. Paul 55101.

3 Present address: Ruminant Research Division, Dow Chemical Co., Lake Jackson, Texas 77566.

4 Present address: Department of Animal Science, The Ohio State University, Wooster 44691.




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L. R. Legleiter, A. M. Mueller, and M. S. Kerley
Level of supplemental protein does not influence the ruminally undegradable protein value
J Anim Sci, April 1, 2005; 83(4): 863 - 870.
[Abstract] [Full Text] [PDF]


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