Metabolic Stress and Nitrogen Excretion in Ruminants

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Date
1957
Authors
Livingston H. G.
Payne W. J. A.
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Abstract
In considering why indigenous ruminants in East Africa apparently do well on feeds of very low nutritional value and under stress conditions the work of Schmidt-Nielsen, et al \1957) came to our notice. These workers showed that when a growing camel was maintained on a low nitrogen intake urea excretion dropped from 13 grammes to 0.2 to 0.5 grammes per day. Schmidt-Nielsen (1959) reviewing this work concluded that under conditions of metabolic stress, that is, low protein intake and growth: the camel is apparently able to prevent the normal excretion of urea in the urine by some form of physiological blocking mechanism and reprocess "waste urea" into new protein.
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East African Agricultural And Forestry Journal
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