Hostname: page-component-84b7d79bbc-g7rbq Total loading time: 0 Render date: 2024-07-31T06:31:11.613Z Has data issue: false hasContentIssue false
  • English
  • Français

A comparative study of non-protein nitrogen supplements for sheep

Published online by Cambridge University Press:  27 March 2009

N. W. Offer ,
R. A. Evans  and
R. F. E. Axford
N. W. Offer
Affiliation:
Department of Biochemistry and Soil Science, University College of North Wales, Bangor, Gwynedd LL57 2UW
R. A. Evans
Affiliation:
Department of Biochemistry and Soil Science, University College of North Wales, Bangor, Gwynedd LL57 2UW
R. F. E. Axford
Affiliation:
Department of Biochemistry and Soil Science, University College of North Wales, Bangor, Gwynedd LL57 2UW
Get access Rights & Permissions [Opens in a new window]

Summary

A basal diet, or the basal diet supplemented with equi-nitrogenous amounts of either ammonium lactate, ammonium acetate or urea was fed to four re-entrant cannulated sheep in a randomized block design.

Collections of duodenal digesta were carried out automatically for a continuous period of 4 days following a 10-day equilibration period for each sheep on each diet.

Supplementation with non-protein nitrogen increased the passage of total amino acids to the duodenum and increased the proportion attributed to microbial protein. It improved pre-duodenal digestibility of modified acid-detergent fibre and increased post-abomasal digestibility of non-ammonia nitrogen, dry matter and gross energy.

Supplementation with non-protein nitrogen increased the energetic efficiency of microbial protein production in the rumen.

Ammonium lactate and acetate were safe and effective sources of non-protein nitrogen for dietary supplementation.

Supplementation with ammonium lactate led to a greater passage of microbial protein to the duodenum than did equi-nitrogenous supplements of urea or ammonium acetate.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 87 , Issue 3 , December 1976 , pp. 567 - 572
Copyright
Copyright © Cambridge University Press 1976

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Allen, C. K., Henderson, H. E. & Bergen, W. G. (1971). Ammonium salts as a source of crude protein for feedlot cattle. Research Report 143. Michigan Agricultural Experimental Station.Google Scholar
Allen, C. K., Henderson, H. E. & Bergen, W. G. (1972). Ammonium salts as a source of crude protein for feedlot cattle. Research Report 174. Michigan Agricultural Experimental Station.Google Scholar
Axford, R. F. E., Evans, R. A. & Offer, N. W. (1971). An automatic device for sampling digesta from the duodenum of the sheep. Research Veterinary Science 12, 128–31.Google Scholar
Belasco, I. J. (1954). New nitrogen feed compounds for ruminants – a laboratory evaluation. Journal of Animal Science 13, 602–10.CrossRefGoogle Scholar
Clancey, M. J. & Wilson, R. K. (1966). Chemical method for predicting digestibility and intake of herbage. Proceedings of the 10th International Grassland Congress, pp. 445–53.Google Scholar
Conway, C. F. (1950). Microdiffusion Analysis and Volumetric Error, 3rd ed., pp. 109–18. London: Crosby, Lockwood & Sons.Google Scholar
Evans, R. A., Axford, R. F. E. & Offer, N. W. (1975). A method for estimating the quantities of microbial and dietary proteins flowing in the duodenal digesta of ruminants. Proceedings of the Nutrition Society 34, 65A.Google Scholar
Fawcett, J. K. & Scott, J. E. (1960). A rapid and precise method for the determination of urea. Journal of Clinical Pathology 13, 156–9.CrossRefGoogle ScholarPubMed
Henderickx, H. K. (1967). In Urea as a Protein Supplement (ed. Briggs, M. H.), pp. 73–82. Oxford: Pergamon Press.Google Scholar
Huston, J. E., Shelter, M. & Breuer, L. H. (1974). Effect of rate of release of urea on its utilisation by sheep. Journal of Animal Science 39, 618–28.CrossRefGoogle ScholarPubMed
Lewis, D. (1960). Ammonia toxicity in the ruminant. Journal of Agricultural Science, Cambridge 55, 111–17.Google Scholar
Marten, J. F. (1964). Technicon Communication, Technicon Inst. Co. Ltd.Google Scholar
Miller, D. S. & Payne, P. R. (1969). A ballistic bomb calorimeter. British Journal of Nutrition 13, 501–8.CrossRefGoogle Scholar
Pentz, E. I. (1969). Adaptation of the Rimini-Sohryver reaction for the measurement of allantoin in urine to the autoanalyser. Advances in Automated Analysis 1, 111–16.Google Scholar
Thomas, A. J. (1970). In Automation, Mechanisation and Data Handling in Microbiology (ed. Baillie, A.), pp. 107–20. London: Academic Press.Google Scholar
Topps, J. H. & Elliott, R. C. (1965). Relationship between concentrations of ruminal nucleic acids and excretion of purine derivatives by sheep. Nature 205, 498–9.Google Scholar
Varner, L. W. & Woods, W. (1971). Influence of ammonium salts of volatile fatty acids upon ration digestibility, rumen fermentation and nitrogen retention by sheep. Journal of Animal Science 33, 1110–17.Google Scholar