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The Endogenous Excretion of Magnesium in Cattle

Die endogene Magniumausscheidung beim Rind

Den endogene magniumudskillelse hos kvæg

Summary

The endogenous fecal magnesium excretion has been determined in two 8-week old Jersey calves and in two mature Holstein cows. The average values were 3.5 mg./kg. body weight for the calves, and 1.5 mg./kg. for the cows. The average Mg absorption was 52 percent for the milk-fed calves, and 27 percent for the cows, which received hay and grain.

Zusammenfassung

Mit Hilfe von Mg28 wurde die endogene Magniiumausscheidung in die Faeces bei zwei 8 Wochen alten Jerseykälbern sowie zwei erwachsenen, schwarz-weissen „Holstein”-Kühen bestimmt. Als durchschnittliche Werte wurden bei den Kälbern 3,5 mg pro kg Lebendgewicht und bei den Kühen 1,5 mg pro kg Lebendgewicht gefunden.

Die Kälber, die mit Milch gefüttert wurden, absorbierten durchschnittlich 52 % des zugeführten Magniums, während die Kühe, deren Futter in Luzernheu und Getreide bestand, durchschnittlich 27 % absorbierten. Diese Resultate werden diskutiert und mit denjenigen früherer Untersuchungen verglichen.

ResumÉ

Ved hjælp af Mg28 er den endogene magniumudskillelse til fæces blevet bestemt hos to 8 uger gamle Jerseykalve, samt hos to voksne, sortbrogede „Holstein” køer. De gennemsnitlige værdier blev for kalvene fundet at være 3,5 mg/kg legemsvægt, og for køerne 1,5 mg/kg legemsvægt.

Kalvene, som fodredes med mælk, absorberede gennemsnitligt 52 % af den tilførte magnium, medents køerne, som fodredes med lucernehø og kærne, gennemsnitligt absorberede 27 %. Disse resultater diskuteres og sammenlignes med tidligere undersøgelser.

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Correspondence to M. G. Simesen.

Additional information

This investigation was supported by a grant from the U. S. Atomic Energy Commission (Contract AT (11-1)-34, no. 1).

On leave from the Royal Veterinary and Agricultural College, Copenhagen, Denmark; appointment supported by the International Co-operation Administration under the Visiting Research Scientists Program administered by the National Academy of Science« of the United States of America.

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Simesen, M.G., Lunaas, T., Rogers, T.A. et al. The Endogenous Excretion of Magnesium in Cattle. Acta Vet Scand 3, 175–184 (1962). https://doi.org/10.1186/BF03547138

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