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Effect of Sodium Silicate on the Development of Urinary Calculi and the Excretion of Various Urinary Constituents in Sheep¹

South Dakota Agricultural Experiment Station, Brookings²

Abstract

Wether lambs were fed rations containing prairie hay or alfalfa hay as a source of roughage, with and without added sodium silicate, in an attempt to elucidate the factors which predispose the production of urinary calculi. Three of the lambs fed prairie hay, but none of those fed alfalfa, developed urinary calculi. Those receiving prairie hay were characterized by higher excretion of phosphorus and lower excretion of magnesium in the urine.

Elevated plasma and urine phosphorus values were correlated with the development of urinary calculi in each animal for which determinations were made.

Sodium silicate feeding had no significant effect on calculi formation. It did, however, significantly lower urinary calcium excretion on the prairie hay ration and urinary magnesium excretion on the alfalfa ration.

¹ Published with the approval of the Director of the South Dakota Agricultural Experiment Station as publication number 421 of the journal series.

² Departments of Station Biochemistry and Animal Husbandry, Brookings.