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Rumen Development in Lambs. II. Rumen Metabolite Changes¹

University of Kentucky, Lexington 40506

Abstract

Fifty-six Hampshire-sired crossbred lambs were used in two trials to study ammonia and VFA concentrations in the rumen at different ages under different feeding conditions. Providing a creep from birth stimulated VFA concentrations in the rumen to levels above those found when no creep was provided as early as 6 days of age. The effect of dry feed consumption on rumen ammonia and VFA production following weaning at 28 days was apparent within 7 to 14 days post-weaning. Consumption of pasture was stimulatory to rumen development but less so than creep feed provided in confinement.

¹ The investigation reported in this paper (No. 70-5-58) is in connection with a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director.

² Present address: W. R. Grace Co., P.O. Box 7, Edinburg, Indiana 46124.

³ Present address: U.S. Meat Animal Research Center, U.S.D.A., Clay Center, Nebraska.

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