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Confirmation of the presence of calcium oxalate crystals in some tropical grasses

Published online by Cambridge University Press:  27 March 2009

R. A. McKenzie  and
K. Schultz
R. A. McKenzie
Affiliation:
Queensland Department of Primary Industries, Animal Research Institute, Yeerongpilly, Brisbane 4105, Australia
K. Schultz
Affiliation:
Queensland Department of Primary Industries, Animal Research Institute, Yeerongpilly, Brisbane 4105, Australia
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Extract

During the last decade, a calcium (Ca) deficiency syndrome, nutritional secondary hyperparathyroidism (NSH), has caused lameness and bone lesions in horses grazing certain tropical grasses in Australia. These grasses contain over 0·5% total oxalate (Walthall & McKenzie, 1976; Blaney, Gartner & McKenzie, 1981a). Blaney et al. (1981a) and McKenzie, Blaney & Gartner (1981) carried out mineral balance experiments with horses fed tropical grass hays or diets with added soluble potassium oxalate. Their results suggested that NSH was caused by the oxalate in the grasses preventing the absorption of Ca. They also suggested that the Ca in the grasses may already be in the form of the insoluble calcium oxalate (Ca(COO)2) salt and thus unavailable to grazing horses. Blaney, Gartner & McKenzie (1981b) subsequently demonstrated that horses could not absorb significant amounts of Ca from Ca(COO)2 crystals added to their diet.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 100 , Issue 1 , February 1983 , pp. 249 - 250
Copyright
Copyright © Cambridge University Press 1983

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References

Akin, D. E. & Burdick, D. (1975). Percentage of tissue types in tropical and temperate grass leaf blades and degradation of tissues by rumen microorganisms. Crop Science 15, 661–670.CrossRefGoogle Scholar
Blaney, B. J., Gartner, R. J. W. & Head, T. A. (1982). The effects of oxalate in tropical grasses on calcium, phosphorus and magnesium availability to cattle. Journal of Agricultural Science, Cambridge 99, 533–539.CrossRefGoogle Scholar
Blaney, B. J., Gartner, R. J. W. & McKenzie, R. A. (1981 a). The effects of oxalate in some tropical grasses on the availability to horses of calcium, phosphorus and magnesium. Journal of Agricultural Science, Cambridge 97, 507–514.CrossRefGoogle Scholar
Blaney, B. J., Gartner, R. J. W. & McKenzie, R. A. (1981 b). The inability of horses to absorb calcium from calcium oxalate. Journal of Agricultural Science, Cambridge 97, 639–641.CrossRefGoogle Scholar
Clark, G. (1973). Staining Procedures used by the Biological Stain Commission, 3rd edn.Baltimore: Williams & Wilkins Co.Google Scholar
Franceschi, V. R. & Horner, H. T. (1980). Calcium oxalate crystals in plants. The Botanical Review 46, 361–427.CrossRefGoogle Scholar
Gallaher, R. N. (1975). The occurrence of calcium in plant tissue as crystals of calcium oxalate. Communications in Soil Science and Plant Analysis 6, 315–330.CrossRefGoogle Scholar
McKenzie, R. A., Blaney, B. J. & Gartner, R. J. W. (1981). The effect of dietary oxalate on calcium, phosphorus and magnesium balances in horses. Journal of Agricultural Science, Cambridge 97, 69–74.CrossRefGoogle Scholar
Walthall, J. C. & McKenzie, R. A. (1976). Osteodystrophia fibrosa in horses at pasture in Queensland: field and laboratory observations. Australian Veterinary Journal 52, 11–16.CrossRefGoogle ScholarPubMed
Ward, G., Harbers, L. H. & Blaha, J. L. (1979). Calcium-containing crystals in alfalfa: their fate in cattle. Journal of Dairy Science 62, 715–722.CrossRefGoogle ScholarPubMed
Yasue, T. (1969). Histochemical identification of calcium oxalate. Ada Histochemica et Cytochemica 2, 83–95.CrossRefGoogle Scholar