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


     

J. Anim Sci. 1980. 50:29-34.
© 1980 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 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 Pendlum, L. C.
Right arrow Articles by Bradley, N. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Pendlum, L. C.
Right arrow Articles by Bradley, N. W.

Nitrogen Sources and Monensin Levels for Growing Steers Fed Corn Silage

L. C. Pendlum, J. A. Boling and N. W. Bradley

University of Kentucky, Lexington 405461,2,

Abstract

Ninety-six Angus x Hereford crossbred steers were utilized in a 2 x 2 factorial arrangement of treatments to study the effects of supplemental nitrogen source and monensin level on growth rate, feed efficiency and plasma amino acid and urea-nitrogen concentrations. The nitrogen supplements were soybean meal and urea, with monensin added to equal 0 or 200 mg per head daily. Daily gains of soybean meal supplemented steers averaged .99 kg vs .92 kg for steers fed the urea supplemented diets during the 106-day trial, but the values were not different (P>.05). Feed-to-gain ratios were slightly lower in steers fed soybean meal compared with those fed urea. Steers fed monensin gained slightly faster and had a lower (P<.05) feed intake and an improved (P<.05) feed-to-gain ratio when compared with steers not receiving monensin. Steers fed SBM had slightly higher plasma essential amino acids than those fed the urea supplement. Monensin exerted a greater effect on plasma parameters measured than did nitrogen source. Plasma threonine, methionine, serine, glutamic acid, glutamine, alanine, ornithine, TAA, EAA and NEAA were higher (P<.05) and EAA to NEAA ratio lower (P<.05) in steers fed monensin at the 106-day sampling time. Plasma urea nitrogen was higher (P<.05) in steers fed urea on days 29 and 106 of the study and higher (P<.05) on day 29 in steers fed monensin.

Footnotes

1 Dept. of Animal Sciences.

2 This paper (78-5-100) is published with the approval of the Director of the Kentucky Agr. Exp. Sta.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1980 by the American Society of Animal Science.