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The effect of diet and blood-plasma magnesium concentration on the endogenous faecal loss of magnesium in sheep

Published online by Cambridge University Press:  27 March 2009

T. F. Allsop  and
J. A. F. Rook
T. F. Allsop
Affiliation:
Division of Agricultural Chemistry, School of Agricultural Sciences, University of Leeds, Leeds LS2 9JT
J. A. F. Rook
Affiliation:
Division of Agricultural Chemistry, School of Agricultural Sciences, University of Leeds, Leeds LS2 9JT
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Summary

Two experiments are reported in which mature, castrated male sheep were used to study the effect of a change of magnesium status, as induced by a continuous intravenous infusion of magnesium, on the faecal output of magnesium. In the first experiment, three artificial diets differing markedly in fibre content but extremely low in magnesium were used and in the second experiment, natural diets of frozen grass and of hay and ground barley.

With the artificial diets, unit change in plasma magnesium concentration gave the same increase in faecal magnesium output with all three diets but on average faecal magnesium output was highest for the diet containing the highest content of fibre and least for the diet containing an intermediate amount of fibre, and the differences, though small, were statistically significant. With the natural diets, there was no significant difference between diets in the increase in faecal magnesium output in response to a change of plasma magnesium concentration but the order of response was much greater than for the artificial diets. It is concluded that absorption of magnesium from the gut is depressed at high plasma magnesium concentrations.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 2 , April 1979 , pp. 403 - 408
Copyright
Copyright © Cambridge University Press 1979

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References

Allsop, T. F. & Rook, J. A. F. (1970). Influence of diet on the relationship between endogenous faecal loss of magnesium and plasma magnesium concentration in sheep. Proceedings of the Nutrition Society 29, 40–41A.Google Scholar
Alisop, T. F. & Rook, J. A. F. (1972). Faecal magnesium output and plasma magnesium concentration in sheep. Proceedings of the Nutrition Society 31, 65–66A.Google Scholar
Berry, W. L. & Johnson, C. M. (1966). Determination of calcium and magnesium in plant material and culture solutions, using atomic-absorption spectroscopy. Applied Spectroscopy 20, 209–211.CrossRefGoogle Scholar
Care, A. D. (1960 a). The kinetics of magnesium distribution within sheep. Research in Veterinary Science 1, 338–349.Google Scholar
Care, A. D. (1960 b). In a discussion on ‘The role of magnesium in mammalian physiology.’ British Veterinary Association Conference on Hypomagnesamia, London, pp. 34–35.Google Scholar
Field, A. C. (1959). Balance trials with magnesium-28 in sheep. Nature 183, 983.CrossRefGoogle ScholarPubMed
Field, A. C. (1961). Studies on magnesium in ruminant nutrition. 3. Distribution of 28Mg in the gastro-intestinal tract and tissues of sheep. British Journal of Nutrition 15, 349–359.Google Scholar
Field, A. C. (1962). Studies on magnesium in ruminant nutrition. 4. Balance trials on sheep given different amounts of grass nuts. British Journal of Nutrition 16, 99–107.CrossRefGoogle ScholarPubMed
Field, A. C., McCallum, J. W. & Butler, E. J. (1958). Studies on magnesium in rumant nutrition. Balance experiments on sheep with herbage from fields associated with lactation tetany and from control pastures. British Journal of Nutrition 12, 433–446.CrossRefGoogle Scholar
Hjerpe, C. A. (1968 a). Experiments with herbage from a field associated with hypomagnesaemic tetany in beef cattle. Cornell Veterinarian 58, 193–216.Google ScholarPubMed
Hjerpe, C. A. (1968 b). Influence of dietary magnesium on metabolism of calcium and magnesium in sheep. American Journal of Veterinary Research 29, 143–151.Google Scholar
House, W. A. & Campen, D. Van (1971). Magnesium metabolism of sheep fed different levels of potassium and citric acid. Journal of Nutrition 101, 1483–1492.CrossRefGoogle ScholarPubMed
Jackson, M. L. (1958). Soil Chemistry Analysis. London: Constable.Google Scholar
Snedbcor, G. W. & Cochran, W. G. (1967). Statistical Methods, 6th edn, pp. 432–436. Iowa State University Press.Google Scholar
Tomas, F. M. & Potter, B. J. (1976 a). The site of absorption of magnesium from the stomach of the sheep. British Journal of Nutrition 36, 37–45.CrossRefGoogle Scholar
Tomas, F. M. & Potter, B. J. (1976 b). Interaction between sites of magnesium absorption in the digestive tract of the sheep. Australian Journal of Agricultural Research 27, 437–446.CrossRefGoogle Scholar
van't Klooster, A. Th. (1967). The state of calcium, magnesium and some other minerals in gut contents and faeces of ruminants in relation to their absorption. Mededalingen van de Landbouwhoogeschool te Wageningen 65–67, 1–136.Google Scholar
Walker, D. M. & Faichney, G. J. (1964). British Journal of Nutrition 18, 201–207.Google Scholar
Willis, J. B. (1960). Determination of metals in blood serum by atomic absorption spectroscopy. II. Magnesium. Speclrochimie Acta 16, 273–278.Google Scholar