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


     

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 HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Loest, C. A.
Right arrow Articles by Trater, A. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Loest, C. A.
Right arrow Articles by Trater, A. M.

Journal of Animal Science, Vol 79, Issue 10 2747-2753, Copyright © 2001 by American Society of Animal Science

JOURNAL ARTICLE

Branched-chain amino acids for growing cattle limit-fed soybean hull-based diets

C. A. Loest, E. C. Titgemeyer, B. D. Lambert and A. M. Trater
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-1600, USA.

Five ruminally cannulated Holstein steers (176 kg) were used in a 5 x 5 Latin square to evaluate the effects of branched-chain AA supplementation on N retention and plasma AA concentrations of steers. Steers were limit-fed (3.0 kg/d of DM) twice daily diets low in ruminally undegradable protein (72% soybean hulls, 19% alfalfa, 5% molasses, and 4% vitamins and minerals). Acetate (400 g/d) was continuously infused into the rumen. Treatments were continuous abomasal infusions of 1) 115 g/d of a mixture of 10 essential AA designed to exceed the steers' requirements (10AA), 2) 10AA with Leu removed, 3) 10AA with Ile removed, 4) 10AA with Val removed, and 5) 10AA with all three branched-chain AA removed. Experimental periods were 7 d, with 3 d for adaptation to treatments and 4 d for total fecal and urinary collections for N balance. Blood samples were collected 5 h after feeding on d 7. Retained N decreased in response to removal of Leu (P < 0.06), Val (P < 0.05), or all three branched-chain AA (P < 0.05). Plasma Leu concentrations decreased (P < 0.05) in response to removal of Leu and all three branched-chain AA. Plasma Ile concentrations decreased (P < 0.05) in response to removal of Ile and all three branched-chain AA but increased (P < 0.05) in response to removal of Leu. Plasma Val concentrations decreased (P < 0.05) in response to removal of Val and all three branched-chain AA but increased (P < 0.05) in response to removal of Leu. Responses in N balance and plasma AA concentrations of growing cattle limit-fed soybean hull-based diets demonstrate limitations in the basal supply of Leu and Val but not Ile provided that supplies of all other essential AA are met.


This article has been cited by other articles:


Home page
 J ANIM SCIHome page
J. van E. Nolte, C. A. Loest, A. V. Ferreira, J. W. Waggoner, and C. P. Mathis
Limiting amino acids for growing lambs fed a diet low in ruminally undegradable protein
J Anim Sci, October 1, 2008; 86(10): 2627 - 2641.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
R. C. Waterman, C. A. Loest, W. D. Bryant, and M. K. Petersen
Supplemental methionine and urea for gestating beef cows consuming low quality forage diets
J Anim Sci, March 1, 2007; 85(3): 731 - 736.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
M. S. Awawdeh, E. C. Titgemeyer, G. F. Schroeder, and D. P. Gnad
Excess amino acid supply improves methionine and leucine utilization by growing steers
J Anim Sci, July 1, 2006; 84(7): 1801 - 1810.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
M. S. Awawdeh, E. C. Titgemeyer, K. C. McCuistion, and D. P. Gnad
Ruminal ammonia load affects leucine utilization by growing steers
J Anim Sci, October 1, 2005; 83(10): 2448 - 2454.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2001 by the American Society of Animal Science.