J. Anim Sci.
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J. Anim Sci. 1972. 34:475-478.
© 1972 American Society of Animal Science
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Influence of Time after Feeding on Certain Abomasal Parameters1

W. M. Knight2, F. N. Owens and U. S. Garrigus

University of Illinois at Urbana-Champaign,3 Urbana 61801

Abstract

Post-prandial changes in abomasal pH and of entry rates of precipitable protein and dry matter into the abomasum were measured with growing lambs fed a high-energy ration. Abomasal pH dropped sharply during the first hour after feeding and gradually rose back to the prefeeding value during the next 7 hours. This correlates well with previously observed abomasal secretion data. Entry rate for tungstic acid precipitable nitrogen was greatest 4 hr. after feeding and decreased linearly for the next 4 hours. About 90 g of precipitable protein entered the abomasum per day from the rumen and over 62% of the digestible dry matter intake disappeared in the rumen.

Footnotes

1 Supported in part by funds from Federal Hatch 353.

2 Present address: Bureau of Veterinary Medicine, VM 110, Food and Drug Administration, Rockville, Md.

3 Department of Animal Science.






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Copyright © 1972 by the American Society of Animal Science.