Poult. 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 Sklan, D
Right arrow Articles by Noy, Y
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Sklan, D
Right arrow Articles by Noy, Y
Poultry Science, Vol 83, Issue 6, 952-961
Copyright © 2004 by Poultry Science Association

Articles

Catabolism and deposition of amino acids in growing chicks: effect of dietary supply

D Sklan and Y Noy

Faculty of Agriculture, Hebrew University, Animal Sciences, Rehovot, Israel. sklan@agri.huji.ac.il

Amino acid (AA) deposition and catabolism were examined in broilers by determining intake and carcass deposition of AA, while defining catabolism as the difference between intake and deposition. The first trial examined the effects of increasing concentrations of a single limiting AA, lysine, on carcass deposition and catabolism. Carcass deposition of all AA increased to a plateau. Catabolism of lysine increased linearly, whereas other AA showed decreased catabolism as dietary lysine increased before reaching a plateau. Carcass AA composition was not influenced by the diet. In the second trial, different dietary ratios of AA were examined and these resulted in increased carcass deposition of lysine, threonine, and arginine before reaching a plateau, whereas other AA showed constant deposition. Catabolism of all AA tended to increase with dietary concentration. Efficiency of AA deposition decreased with age and catabolism comprised a smaller proportion of intake in the first week posthatch. A third trial examined changing AA ratios and composition. No correlation was observed between dietary AA concentrations and carcass deposition, whereas catabolism was linearly correlated with dietary composition. Multiple regression analysis indicated that the catabolic pathways of some AA are interrelated. These data are consistent with a model where carcass accretion is determined by the limiting AA until some maximal rate is achieved, whereby another AA may become limiting. Excess supply of any AA is catabolized and these catabolic processes interact with an accompanying energy cost.


This article has been cited by other articles:


Home page
 Poult. Sci.Home page
J. I. M. Fernandes, A. E. Murakami, E. N. Martins, M. I. Sakamoto, and E. R. M. Garcia
Effect of arginine on the development of the pectoralis muscle and the diameter and the protein:deoxyribonucleic acid rate of its skeletal myofibers in broilers
Poult. Sci., July 1, 2009; 88(7): 1399 - 1406.
[Abstract] [Full Text] [PDF]

Home page
 Poult. Sci.Home page
Samadi and F. Liebert
Threonine Requirement of Slow-Growing Male Chickens Depends on Age and Dietary Efficiency of Threonine Utilization
Poult. Sci., June 1, 2007; 86(6): 1140 - 1148.
[Abstract] [Full Text] [PDF]

Home page
 Poult. Sci.Home page
Samadi and F. Liebert
Estimation of Nitrogen Maintenance Requirements and Potential for Nitrogen Deposition in Fast-Growing Chickens Depending on Age and Sex
Poult. Sci., August 1, 2006; 85(8): 1421 - 1429.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2004 by the Poultry Science Association.