The Absorption of Ammonia Through the Rumen of the Sheep

Abstract

In sheep amtesthetized with chloralose, the transport of ammonia across t,he rumen epithelium increases with the concentration gradient at pH 6· .~. The movement of volatile fatty acids across the rumen epithelium at pH 6·5 increases the t,ransport of ammonia. The effects both of ammonia concentration and of the movement,s of the fatty acids on the transport of ammonia were so reduced at pH 4-·5 that they were either absent or within experimental errol".