Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-29T02:49:15.933Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on magnesium in ruminant nutrition

9. Effect of potassium and magnesium intakes on development of hypomagnesaemia in sheep

Published online by Cambridge University Press:  09 March 2007

N. F. Suttle  and
A. C. Field
N. F. Suttle
Affiliation:
Moredun Research Institute, Gilmerton, Edinburgh
A. C. Field
Affiliation:
Moredun Research Institute, Gilmerton, Edinburgh
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1. In Expt 1, five groups of four dry non-pregant ewes were given 1 kg/day of a semi-purified diet containing either 0.05, 0.10 or 0.15% magnesium with 0 or 4.44% added potassium. Plasma Mg Concentrations were reduced by increasing the K intake (P < 0.001) and by reducing the Mg intake (P < 0.1). The effects were additive and, at the lowest Mg intake, supplementary K induced two cases of hypomagnesaemic tetany.

2. Expt 2 was similar to Expt 1 except that the ewes were suckling single lambs, they were given 2 kg food/day and the lowest dietary Mg concentration was 0.075%. K again lowered plasma Mg values and induced two cases of tetany but reductions in Mg intake had no effect.

3. After repletion on the basal diet, sixteen lactating ewes from Expt 2 were transferred to a diet containing 0.05% Mg with 0, 2.22 or 4.44% added K. Plasma Mg concentrations fell rapidly on each treatment; the effect was greatest in K-supplemented groups ( P < 0.05) and two cases of hypomagnesaemic tetany were induced at the highest K intake.

4. In each experiment the K supplements caused a rapid increase in plasma K concentrations to a relatively constant level some 5 mg/100 ml above the resting value of 18.0 mg/100 ml.

5. Some sheep refused K-supplemented diets at first and there was a tendency for refusals to be greatest at the lowest Mg intakes.

6. The results are discussed in relation to the aetiology of hypomagnesaemic tetany.

Type
Research Article
Information
British Journal of Nutrition , Volume 23 , Issue 1 , March 1969 , pp. 81 - 90
Copyright
Copyright © The Nutrition Society 1969

References

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. London: Agricultural Research Council.Google Scholar
Allcroft, W. M. (1947). Vet. J. 103, 2.Google Scholar
Blaxter, K. L., Cowlishaw, N. & Rook, J. A. F. (1960). Anim. Prod. 2, 1.CrossRefGoogle Scholar
Blaxter, K. L. & McGill, R. (1956). Vet. Rev. Annot. 2, 35.Google Scholar
Butler, E. J., Veterinary Investigation and Agricultural Advisory Officers of the East and West of Scotland Agricultural Colleges (1963). J. agric. Sci., Camb. 60, 329.CrossRefGoogle Scholar
Carr, C. W. (1955). Proc. Soc. exp. Biol. Med. 89, 546.CrossRefGoogle Scholar
De Groot, T. (1961). Tijdschr. Diergeneesk. 86, 1265.Google Scholar
Eaton, H. D. & Avampato, J. E. (1952). J. Anim. Sci. 11, 761.Google Scholar
Field, A. C. (1964). Br. J. Nutr. 18, 357.CrossRefGoogle Scholar
Halse, K. (1960). Proc. int. Grassld Congr. VIII. Reading p. 12.Google Scholar
Hendriks, H. J. (1962). Some biochemical aspects of hypomagnesaemic tetany. PhD Thesis, University of Utrecht.Google Scholar
Herd, R. P. (1966). Aust. vet. J. 42, 269.CrossRefGoogle Scholar
Kemp, A., Deijs, W. B., Hemkes, O. J. & Van Es, A. J. H. (1960). Proceedings of a Conference on Hypomagnesaemia, p. 23. LondonBritish Veterinary Association.Google Scholar
Kunkel, H. O., Burns, K. H. & Camp, B. J. (1953). J. Anim. Sci. 12, 451.CrossRefGoogle Scholar
Meyer, H. & Steinbeck, H. (1960). Dt. tierärztl. Wschr. 67, 315.Google Scholar
Odell, D., Hatfield, E. E., Shrewsberry, W. C., Gibson, M. E. & MacVicar, R. (1952). J. Anim. Sci. 11, 790.Google Scholar
Pearson, P. B., Gray, J. A. & Reiser, R. (1949). J. Anim. Sci. 8, 52.CrossRefGoogle Scholar
Smith, R. H. (1959). Nature, Lond. 184, 821.CrossRefGoogle Scholar
Suttle, N. F. & Field, A. C. (1967). Br. J. Nutr. 21, 819.CrossRefGoogle Scholar
Walser, M. (1961). J. clin. Invest. 40, 723.CrossRefGoogle Scholar
Wilson, A. A. (1964). Vet. Rec. 76, 1382.Google Scholar