J. Anim Sci.
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J. Anim Sci. 1970. 30:297-302.
© 1970 American Society of Animal Science
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Urea and Trace Minerals for Finishing Cattle Rations1

J. L. Clark, W. H. Pfander and G. B. Thompson2,3,

University of Missouri, Columbia

Abstract

The addition of urea to cattle finishing rations has become a widely used practice because of the economical advantage of urea compared to the plant proteins. Perry, Beeson and Mohler (1967), Haskins et al. (1967) and Oltjen, Davis and Hiner (1965) have all reported that urea could be used effectively as a supplemental nitrogen source in high energy fattening rations for beef cattle. Goodrich, Johnson and Meiske (1967) reported that sulfur (S) added to urea supplemented rations increased performance of cattle. However, Ely and Duitsman (1967) reported no improvement.

Oltjen et al. (1959) reported no response from trace minerals when the finishing ration consisted of milo, but did obtain a response when the ration contained corn. Trace minerals may be essential in all-concentrate milo and barley rations (Brethour and Duitsman, 1966; Raun et al., 1965) and in rations containing milo and added tallow (Hale et al., 1965).

The objective of these trials was to determined the value of urea mineral additions, S and a combination of zinc (Zn), Manganese (Mn), Copper (Cu) and iron (Fe) to finishing rations containing corn and grass hay for cattle.

Footnotes

1 Contribution from Missouri Agricultural Experiment Station. Journal Series No. 5668. Approved by the Director.

2 Animal Husbandry Department.

3 The assistance of G. F. Krause, E. E. Pickett, C. W. Gehrke and Carl Angel is gratefully acknowledged.






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Copyright © 1970 by the American Society of Animal Science.