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A note on the flow of endogenous protein to the omasum and abomasum of steers

Published online by Cambridge University Press:  02 September 2010

F. J. Hart  and
Jane Leibholz
F. J. Hart
Affiliation:
Coopers Pitman-Moore, ‘Birling’ Northern Road, Bringelly, NSW 2171, Australia
Jane Leibholz
Affiliation:
Department of Animal Husbandry, University of Sydney, Camden, NSW 2570, Australia
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Abstract

Three steers cannulated in the rumen and abomasum were given a diet of wheat straw, chopped and soaked in sodium hydroxide and then washed to pH less than 8. The straw was sprayed with sucrose, urea and minerals. The diet was free of digestible protein and given at 1·7 to 4·1 kg/day. Microbial protein flowing to the omasum was measured by 15N. By difference, the flow of endogenous protein nitrogen to the omasum was found to be 2·2 g/kg dry-matter intake. The flow of endogenous protein nitrogen to the abomasum was 3·3 to 9·4 g/kg dry-matter intake, and it decreased with increasing food intake.

Keywords

abomasumendogenous proteinomasumsteers

Information

Type
Research Article
Information
Animal Production , Volume 51 , Issue 1 , August 1990 , pp. 217 - 219
Copyright
Copyright © British Society of Animal Science 1990

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References

REFERENCES

Bailey, C. B. and Balch, C. C. 1961. Saliva secretion and its relation to feeding in cattle. 2. The composition and rate of secretion of mixed saliva in the cow during rest. British Journal of Nutrition 15: 383–402.CrossRefGoogle ScholarPubMed
Faichney, G. J. 1975. The use of markers to partition digestion within the gastro-intestinal tract of ruminants. In Digestion and Metabolism in the Ruminant, Proceedings of IVth International Symposium on Ruminant Physiology (ed. McDonald, I. W. and Warner, A. C. I.), pp. 277–291. University of New England Publishing Unit.Google Scholar
Harrop, C. J. F. and Phillipson, A. T. 1974. Nitrogen metabolism in the ovine stomach. 3. Urea in the abomasal secretions. Journal of Agricultural Science, Cambridge 83: 237–247.CrossRefGoogle Scholar
Hill, K. J. 1961. Digestive secretions in the ruminant. In Digestive Physiology and Nutrition of the Ruminant (ed. Lewis, D.), pp. 48–58. Butterworths, London.Google Scholar
Hogan, J. P. 1975. Quantitative aspects of nitrogen utilization in ruminants. Journal of Dairy Science 58: 1164–1177.CrossRefGoogle ScholarPubMed
Kennedy, P. M. and Milligan, L. P. 1980. The degradation and utilization of endogenous urea in the gastrointestinal tract of ruminants: a review. Canadian Journal of Animal Science 60: 205–221.CrossRefGoogle Scholar
Kuznetsova, V. M. 1950. Cited in I. P. Pavlov's Theories and Farm Animal Physiology. P. N. Serebryekov, Selkhozgiz, Moscow.Google Scholar
Nolan, J. V. and Leng, R. A. 1972. Dynamic aspects of ammonia and urea metabolism in sheep. British Journal of Nutrition 27: 117–194.CrossRefGoogle ScholarPubMed
Nolan, J. V. and MacRae, J. C. 1976. Absorption and recycling of nitrogenous compounds in the digestive tract of sheep. Proceedings of the Nutrition Society 35: 110A (Abstr.).Google ScholarPubMed
Ørskov, E. R. and MacLeod, N. A. 1982. The flow of N from the rumen of cows and steers maintained by intraruminal infusion of volatile fatty acids. Proceedings of the Nutrition Society 41: 76A (Abstr.).Google Scholar