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Nitrogen metabolism in the reticule-rumen of steers on diets containing extracted soya-bean meal and infrared-toasted soya beans*

Published online by Cambridge University Press:  09 March 2007

O. T. Stallcup  and
G. V. Davis
O. T. Stallcup
Affiliation:
Department of Animal Sciences, University of Arkansas, Fayetteville, Arkansas, USA
G. V. Davis
Affiliation:
Department of Animal Sciences, University of Arkansas, Fayetteville, Arkansas, USA
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Abstract

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1. Diets containing cottonseed hulls and flaked infrared-toasted soya beans, cottonseed hulls and soya-bean meal or cottonseed hulls alone were fed to three fistulated steers. 2. The diet containing toasted soya-bean flakes was associated with the highest concentrations of total nitrogen, protein N, and ammonia N in the rumen liquor; the diet of cottonseed hulls was associated with the lowest concentrations; and soya-bean meal was associated with intermediate concentrations. 3. Concentrations of residual N were highest in rumen liquor during the first 3 h after feeding when soya-bean meal was given and highest with the other diets between 10 and 12 h after feeding; concentrations of non-protein N were highest with the toasted soya-bean flakes at all times except approximately 2 h after feeding when they were highest with soya-bean meal. 4. The rumen liquor was more acid with soya-bean flakes than with the other diets. 5. The total concentration of volatile fatty acids (m-moles/100 ml) was highest with the diet containing toasted soya-bean flakes, followed by that with soya-bean meal and cottonseed hulls and lowest with the cottonseed-hull diet. The molar percentage of acetic acid was highest with soya-bean meal, whereas its concentration (m-moles/100 ml) was highest with soya-bean flakes. Propionic acid concentrations were highest with the toasted soya-bean flakes. 6. These results indicate that the metabolism in the reticulo- rumen of infrared-toasted whole soya beans given as flakes differs from that of soya-bean meal.

Type
Research Article
Information
British Journal of Nutrition , Volume 20 , Issue 2 , May 1966 , pp. 163 - 169
Copyright
Copyright © The Nutrition Society 1966

References

REFERENCES

Annison, E. F. (1956). Biochem. J. 64, 705.Google Scholar
Association of Official Agricultural Chemists (1960). Methods of Analysis, 9th ed., p. 12, para. 2036. Washington, D.C.: Association of Official Agricultural Chemists.Google Scholar
Baumgardt, B. R. (1964). Bull. Dep. Dairy Sci. Univ. Wis. no. 1.Google Scholar
Belasco, I. J. (1954). J. Anim. Sci. 13, 748.Google Scholar
Conway, E. J. (1933). Biochem. J. 27, 430.Google Scholar
Conway, E. J. & Byrne, A. (1933). Biochem. J. 27, 419.Google Scholar
Davis, G. V. & Stallcup, O. T. (1964). J. Dairy Sci. 47, 1237.Google Scholar
Folin, O. & Wu, H. (1919). J. biol. Chem. 38, 81.Google Scholar
Morrison, F. B. (1956). Feeds and Feeding, 22nd ed. Ithaca, New York: The Morrison Publishing Co.Google Scholar
Perry, T. W. (1963). Feedstuffs 35, no. 43, p. 14.Google Scholar
Stallcup, O. T. (1954). J. Dairy Sci. 37, 1449.Google Scholar
Stallcup, O. T. & Looper, C. G. (1958). J. agric. Fd Chem. 6, 916.Google Scholar
Steele, G. D. & Torrie, J. H. (1960). Principles and Procedure of Statistics. New York: McGraw-Hill Book Co.Google Scholar