A Study of Sheep Fed High Levels of Potassium Bicarbonate with Particular Reference to Induced Hypomagnesemia

Kunkel, H. O.; Burns, K. H.; Camp, Bennie J.

doi:10.2527/jas1953.123451x

Cited by 31 publications

(13 citation statements)

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“…The Maximum Tolerable Level for ruminants as defined by the National Research Council is 3.0% (National Research Council 2005). Others have also reported a depression in feed intake when K is added to the diet (Suttle and Field 1969), with this reduction accentuated by low Na and Mg (Kunkel et al 1953). These are isolated studies but nevertheless align well with the reduction in feed intake described in unsupplemented sheep grazing vegetative wheat crops (Dove and Kelman 2015a).…”

Section: Received 5 March 2015 Accepted 24 June 2015 Published Onlisupporting

confidence: 61%

Mineral nutrition of sheep: new insights into interactions when grazing vegetative crops

Masters

2015

Anim. Prod. Sci.

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Section: Received 5 March 2015 Accepted 24 June 2015 Published Onlisupporting

confidence: 61%

Mineral nutrition of sheep: new insights into interactions when grazing vegetative crops

Masters

2015

Anim. Prod. Sci.

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“…It is possible that a high intake of potassium might interfere with the absorption or subsequent metabolism of magnesium. This has not been found in other comparable experiments (Pearson, 1948;Pearson, Gray and Reiser, 1949;Eaton and Avampato, 1952;Daniel et ah, 1952), and even the experiments by Kunkel, Burns and Camp (1953) may be criticised since addition of magnesium oxide to the ration did not reverse the small depression of serum magnesium which was observed. A direct effect of potassium on the ability of sheep to maintain a normal concentration of magnesium in the serum has been claimed by Kunkel, Burns and Camp (1953).…”

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confidence: 76%

Potassium and hypomagnesaemic tetany in calves

1960

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1. Four groups of four calves were given rations containing adequate and inadequate amounts of magnesium, both with or without an excess of potassium, added as potassium chloride.2. The excess of potassium resulted in the death of three of the eight calves, the clinical signs observed before death being cardiac insufficiency, oedema, severe muscular weakness and muscular atony. The excitability of motor nerves, measured by the method of Kugelberg (1944), was reduced by excess dietary potassium and the serum concentration of potassium was increased. The potassium content of the erythrocytes declined with age, irrespective of dietary treatment.3. Although this evidence of potassium intoxication was obtained, no concomitant abnormalities were induced in magnesium metabolism by the excess of potassium whether or not the calves received rations containing adequate or inadequate amounts of magnesium.4. Excess potassium had no effect on the concentration of potassium or magnesium in the muscle or on the Ca : Mg ratio in bone.5. Magnesium deficiency resulting in tetany was shown to have no statistically significant effect on the intracellular concentration of magnesium i n the muscle. A very small drop in erythrocyte magnesium was noted. No effect on the excitability of motor nerves was observed.6. The results suggest that the effect of excessive manuring of pastures with potassic fertiliser in increasing the incidence of hypomagnesaemic tetany is not due to a direct effect of potassium on the magnesium metabolism of the animal.

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“…Hypomagnesemia has been the most consistent clinical symptom. Elevated levels of dietary potassium (K) (Kunkel, Burns and Camp, 1953;Ward, 1966a) and nitrogen (Redmond, 1950;Metson et al, 1966) have lowered plasma magnesium (Mg). Studies by Burt and Thomas (1961), Burau and Stout (1965) and Stout, Brownell and Burau (1967) have suggested a possible role of plant organic acids (namely citric and trans-aconitic) in the development of the tetany syndrome.…”

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confidence: 99%

Effect of Oral Potassium and Sodium Chloride on Plasma Composition of Cattle: A Grass Tetany Related Study

Scotto

Bohman

Lesperance

1971

Journal of Animal Science

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A Study of Sheep Fed High Levels of Potassium Bicarbonate with Particular Reference to Induced Hypomagnesemia

Cited by 31 publications

References 0 publications

Mineral nutrition of sheep: new insights into interactions when grazing vegetative crops

Mineral nutrition of sheep: new insights into interactions when grazing vegetative crops

Potassium and hypomagnesaemic tetany in calves

Effect of Oral Potassium and Sodium Chloride on Plasma Composition of Cattle: A Grass Tetany Related Study

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