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Ammonia toxicity in cattle. III. Absorption of ammonia gas from the rumen and passage of urea and ammonia from the rumen to the duodenum

, : Ammonia toxicity in cattle. III. Absorption of ammonia gas from the rumen and passage of urea and ammonia from the rumen to the duodenum. Journal of Animal Science 45(3): 551-558

Ammonia gas infused into the dorsal vault of the rumen of cattle at 200 ml per min increased the ammonia concentration in rumen fluid expressed from the hay mat but failed to increase the concentration in the rumen fluid in the ventral sac of the rumen below the hay mat or in the jugular blood. The animals did not exhibit ammonia toxicity. Rumen motility was greatly reduced; this may have impaired the mixing of the contents.


PMID: 903312

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