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The effect of potassium and magnesium infusion on plasma Mg concentration and Mg balance in ewes

Published online by Cambridge University Press:  24 July 2007

A. F. McLean ,
W. Buchan  and
D. Scott
A. F. McLean
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
W. Buchan
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
D. Scott
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

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1. Concentrations of magnesium in plasma, the ionic concentration in rumen digesta supernatant fractions, Mg balance and electropotential differences were measured in three ewes which were fed on grass and suppleyented with potassium and Mg by intraruminal infusion.

2. Mean plasma Mg concentrations were unaltered by combined K and Mg treatments, but fell (P < 0.001) when K alone was infused.

3. The mean concentrations, in rumen digesta, of sodium and K varied reciprocally (P < 0.001) with each other when K was infused, but were unaffected by Mg infusion. The mean Mg concentrations in rumen digesta fell (P < 0.01) with K infusion but rose (P < 0.001) with Mg infusion.

4. Absorption and excretion of Mg rose (P < 0.001) when Mg intake was increased but was unaffected by K intake.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 54 , Issue 3 , November 1985 , pp. 713 - 718
Copyright
Copyright © The Nutrition Society 1985

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