Silicon in Cow's Milk

Abstract

Milk from six cows fed alternately for a four-month period on a control ration and one containing a silicon supplement (sodium silicate) was analyzed photometrically for its silicon content. Control samples averaged 1.43 mg. of silicon per liter; samples obtained when the cows received the supplement averaged 1.39 mg. per liter. Wide variations were noted from month to month and between individuals. Feeding of the supplement did not consistently or significantly increase the silicon content of milk. Regardless of breed, group, or treatment, there was an unexplained but definite and significant decrease in the values as the season and the stage of lactation progressed. © 1957, American Dairy Science Association. All rights reserved.