J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1974. 39:618-628.
© 1974 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Huston, J. E.
Right arrow Articles by Breuer, L. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Huston, J. E.
Right arrow Articles by Breuer, L. H.

Effect of Rate of Release of Urea on its Utilization by Sheep1, 2,

J. E. Huston3, Maurice Shelton3 and L. H. Breuer4

Texas Agricultural Experiment Station, College Station 77843 and San Angelo 76901

Abstract

A method of preparing a slow-release urea material by means of physical entrapment and in vitro and in vivo evaluations of it are described. A slow-release urea preparation was selected for animal evaluation based on studies of rates-of-release in artificial saliva and rumen fluid. Experiments were conducted to determine the effects of a reduced release rate of urea in the rumen of sheep on blood urea concentration and nitrogen excretion and the comparative value of urea, slow-release urea and cottonseed meal as supplements to low protein, medium fiber lamb rations. Collectively, the results indicate that reducing the rate of release of urea in the rumen increases its value as a supplemental nitrogen source when included in a medium fiber diet fed to sheep. Results are discussed in relation to acute and sub-acute ammonia toxicity, intraruminal nitrogen utilization and maximum capacity for ruminal protein synthesis.

Footnotes

1 Technical Article TA-10169. Published by permission of Texas A&M University, Texas Agricultural Experiment Station.

2 A portion of the data was taken from dissertation submitted by the senior author to the Graduate College, Texas A&M University, in partial fulfillment of the requirements for the Ph.D. degree.

3 Texas A&M University Agricultural Research and Extension Center, San Angelo 76901.

4 Present address: Ralston Purina, St. Louis, Missouri.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1974 by the American Society of Animal Science.