Skip to main content Accesibility Help
×
×
Home

The effect of dietary oxalate on calcium, phosphorus and magnesium balances in horses

  • R. A. McKenzie (a1), B. J. Blaney (a1) and R. J. W. Gartner (a1)
Summary

Negative calcium and phosphorus balances were produced in two experiments on six horses fed diets containing 2·6 or 4·3% total oxalate. The main calcium and phosphorus loss was in faeces. The urinary loss of calcium was reduced and that of phosphorus increased. A positive balance of magnesium was maintained. No clinically significant changes in blood concentrations of calcium, phosphorus, magnesium or alkaline phosphatase were produced. The bulk of ingested oxalate was unaccounted for in faeces and urine. It is suggested that the intestinal bacterial flora utilized the oxalate. The results supported the hypothesis that dietary oxalate is the cause of equine nutritional secondary hyperparathyroidism which arises when horses graze several tropical grass species.

Copyright
References
Hide All
Berger, L. & Rudolph, G. G. (1965). Alkaline and acid phosphatase. In Standard Methods of Clinical Chemistry (ed. Meites, S.), vol. 5, pp. 211221. New York: Academic Press.
Blood, D. C., Henderson, J. A. & Radostits, O. M. (1979). Veterinary Medicine, 5th ed.London: Bailliere Tindall.
Goodman, L. S. & Gilman, A. (1970). The Pharmacological Basis of Therapeutics, 4th ed.New York: Macmillan.
Groenendyk, S. & Seawright, A. A. (1974). Osteodystrophia fibrosa in horses grazing Setaria sphacelata. Australian Veterinary Journal 50, 131132.
Harvey, W. R. (1977). User's Guide for LSML76. Ohio State University Press.
Hintz, H. F. & Schryver, H. F. (1976). Potassium metabolism in ponies. Journal of Animal Science 42, 637643.
Hodgkinson, A. (1977). Oxalic Acid in Biology and Medicine. London: Academic Press.
Joyce, J. R., Pierce, K. R., Romane, W. M. & Baker, J. M. (1971). Clinical study of nutritional secondary hyperparathyroidism in horses. Journal of the American Veterinary Medical Association 158, 20332042.
McKenzie, R. A., Blaney, B. J., Gartner, R. J. W., Dillon, R. D. & Standfast, N. F. (1979). A technique for the conduct of nutritional balance experiments in horses. Equine Veterinary Journal 11, 232234.
Moir, K. W. (1953). The determination of oxalic acid in plants. Queensland Journal of Agricultural Science 10, 13.
Moir, K. W. (1954). The preservation of bovine blood for the determination of inorganic phosphate in the diagnosis of aphosphorosis. Queensland Journal of Agricultural Science 11, 143147.
Murphy, G. M., Ryan, K. M. & Blight, G. W. (1977). A novel approaoh to the analysis of minerals in pasture samples by atomic absorption spectroscopy. Abstract Fourth Australian Symposium on Analytical Chemistry. Royal Australian Chemical Institute. pB12.
National Research Council (1973). Nutrient Requirements of Horses, 3rd ed.National Academy of Sciences National Research Council, Washington D.C., U.S.A.
Rasmussen, H. & Bordier, P. (1974). The Physiological and Cellular Basis of Metabolic Bone Disease. Baltimore: Williams & Wilkins.
Roughan, P. G. & Slack, C. R. (1973). Simple methods for routine screening and quantitative estimation of oxalate content of tropical grasses. Journal of the Science of Food and Agriculture 24, 803811.
Schryver, H. F., Craig, P. H. & Hintz, H. F. (1970). Calcium metabolism in ponies fed varying levels of calcium. Journal of Nutrition 100, 955964.
Schryver, H. F., Craig, P. H., Hintz, H. F., Hogue, D. E. & Lowe, J. E. (1970). The site of calcium absorption in the horse. Journal of Nutrition 100, 11271132.
Schryver, H. F., Hintz, H. F. & Lowe, J. E. (1978). Calcium metabolism, body composition, and sweat losses of exercised horses. American Journal of Veterinary Research 39, 245248.
Smith, F. W. (1972). Potassium nutrition, ionic relations, and oxalic acid accumulation in three cultivars of Setaria sphacelata. Australian Journal of Agricultural Research 23, 969980.
Swartzman, J. A., Hintz, H. F. & Schryver, H. F. (1978). Inhibition of calcium absorption in ponies fed diets containing oxalic acid. American Journal of Veterinary Research 39, 16211623.
Walthall, J. C. & McKenzie, R. A. (1976). Osteodystrophia fibrosa in horses at pasture in Queensland: field and laboratory observations. Australian Veterinary Journal 52, 1116.
Ward, G., Harbers, L. H. & Blaha, J. J. (1979). Calcium-containing crystals in alfalfa: their fate in cattle. Journal of Dairy Science 62, 715722.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed