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The Preparation of Feeds for Cattle

II. A Study of the Chemical and Physical Composition of the Residual Ingesta in the Rumen at the End of a Twenty-four Hour Period

Ohio Agricultural Experiment Station

Abstract

This is a progress report on the effect of preparing feeds for cattle by various methods. The specific interest was the residual ingesta in the rumen at the end of a twenty-four hour period.

The gastric fistula method was employed, since it afforded oportunities for direct visual inspection of the rumen and allowed the withdrawal of samples of the rumen contents for physical and chemical analyses at desired intervals.

Three grade beef steers were used in which gastric fistulae had been made by Dr. A. F. Schalk. The ages of the animals varied, being approximately, A, 18 months; B, 23 months; D, 32 months. At the time the studies were made, all the animals were in good physical condition and they were representative of animals commonly found in farm feed lots.

The rations consisted of good quality alfalfa hay, which had been cut from the same field at the same time. This material was fed in 4 different forms, namely:

^* This is a cooperative project between the Departments of Animal Husbandry and Agricultural Engineering of the Ohio Agricultural Experiment Station. Cooperators include Dr. A. F. Schalk, Mr. E. A. Silver, and Dr. C. W. Gay.