J. Anim Sci.
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J. Anim Sci. 1971. 32:348-353.
© 1971 American Society of Animal Science
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Feeding Heated Urea-Cellulose Preparations to Ruminants1, 2,

L. B. Daniels3, M. E. Muhrer, J. R. Campbell and F. A. Martz

University of Missouri, Columbia 65201

Abstract

UREA is a common non-protein nitrogen (NPN) source used in ruminant rations. However, high dietary levels may result in problems such as decreased feed intake due to palatabilty (Huber and Sandy, 1965; Huber and Cook, 1969). Another important problem encountered is ammonia toxicity (Dinning et al., 1948; Repp et al., 1955; Lewis, 1960; Rummler, Laue and Berschneider, 1962; Roller, 1966; Henshaw, Whitehair and Ellis, 1969) which results from a rapid enzymatic breakdown of urea to ammonia in the rumen yielding more ammonia than can be utilized by the rumen microorganisms. This excess of ammonia is then absorbed into the blood stream at toxic levels.

Slowing the rate of ammonia production from urea in the rumen would permit an increased use of this material in the ration. One way this may be accomplished is to change the chemical composition of urea. Several workers (Deyoe et al., 1968; Muhrer, Harris and Bloomfield, 1968; Harris, 1968) have obtained a reaction between urea and starch to form products which are more palatable and which release ammonia at a slower rate in the rumen.

Footnotes

1 Contribution from the Missouri Agricultural Experiment Station. Journal Series No. 5872. Approved by the Director.

2 This investigation was supported in part by USPHS Grant 5SO5FR7053-04.

3 Present address: Department of Animal Sciences, University of Arkansas, Fayetteville.






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Copyright © 1971 by the American Society of Animal Science.