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Transfer of urea from the blood to the rumen of sheep

Published online by Cambridge University Press:  09 March 2007

P. M. Kennedy  and
L. P. Milligan
P. M. Kennedy
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
L. P. Milligan
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
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Abstract

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1. The rate of transfer of plasma urea-nitrogen to rumen ammonia was measured by infusion of 15NH4Cl and [15N]urea into sheep given brome grass (Bromus inermis) or lucerne (Medicago sativa) pellets. Urea was infused into the rumen or abomasum of two sheep given brome grass in order to increase the concentration of rumen ammonia.

2. From 6.2 to 9.8 g/d of plasma urea-N were transferred to the rumen of sheep given brome grass pellets and a measurement of 1.3 g nitrogen/d was obtained for a sheep given lucerne pellets. When urea was infused into the rumen of sheep given brome grass pellets the transfer was only 2.8–3.7 g N/d.

3. There was a significant negative correlation between the rate of transfer of plasma urea-N to the rumen and the concentration of rumen ammonia.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 40 , Issue 1 , July 1978 , pp. 149 - 154
Copyright
Copyright © The Nutrition Society 1978

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