Methods for Identifying Feeds and Measuring Their Rate of Passage through the Rumen of Cattle

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Abstract
Methods were presented for identifying individual feeds within the rumen of cattle while feeding a mixed ration containing corn, hay, and protein supplement. A chemical method of identification was based upon mathematical treatment of the principal nutrients contained in the feeds fed and the nutrients present in the rumen ingesta. This method was checked, in part, by physically separating out the corn contained in representative samples of rumen contents. The general agreement in results obtained by the two methods was suggestive of their over-all accuracy.

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