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Calcium, magnesium and phosphorus in lactation and the dry period

Published online by Cambridge University Press:  02 September 2010

D.W. Pickard
Affiliation:
Department of Animal Physiology and Nutrition, University of LeedsLeeds, LS5 3HL
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Extract

This paper will deal with the relevance of calcium, phosphorus and magnesium intakes to the variations which are seen in the plasma levels of these elements in dairy cows during lactation and the dry period.

Calcium

There is to my knowledge no report of any consistent effect of age, milk yield, season or level of calcium intake on the level of calcium in the blood of dairy cows. Changes do, however, take place in the blood level of calcium and it is the factors which influence the extent of such changes which I will discuss, particularly those relating to milk fever.

Type
Research Article
Copyright
Copyright © British Society of Animal Production 1978

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References

REFERENCES

Barlet, J.P. and Garel, J.M. 1975. Plasma immunoreactive calcitonin and parathyroid hormone in parturient cows. J. Endocr. 66: 299300.Google Scholar
Black, H.E., Capen, C.C. and Arnadd, C.D.. 1973. Ultra structure of parathyroid glands and plasma immunoreactive parathyroid hormone in pregnant cows fed normal and high calcium diets. Lab. Invest. 29: 173185.Google Scholar
Boda, J.M. and Cole, H.H. 1954. The influence of dietary calcium and phosphorus on the incidence of milk fever in dairy cattle. J. Dairy Sci. 37: 360372.CrossRefGoogle Scholar
Hegsted, D.M. 1971. Interactions in nutrition. In Newer Trace Elements in Nutrition, (ed. Mertz, W. and Cornatzer, W.E.). Marcel Dekker Inc. New York.Google Scholar
Manston, R. 1967. The influence of dietary calcium and phosphorus concentration on their absorption in the cow. J. agric. Sci., Camb. 68: 263268.CrossRefGoogle Scholar
Payne, J.M., Rowlands, G.J., Manston, R. and Dew, S.M. 1973. A statistical appraisal of the results of metabolic profile tests on 75 dairy herds. Br. vet. J. 129: 370375.CrossRefGoogle ScholarPubMed
Pickard, D.W., Care, A.D., Tomlinson, S. and O'riordan, J.L.H. 1975. Immunoreactive parathyroid hormone in the blood in bovine parturient hypocalcaemia: effects of changes in the dietary intake of calcium and phosphorus. J. Endocr. 67: 45P46P.Google ScholarPubMed
Pickard, D.W. 1977. Calcium requirements in relation to milk fever. In Nutrition and the Climatic Environment (ed. Haresign, W., Swan, H. and Lewis, D.), pp. 113122. Butterworths, London.Google Scholar