Document Detail

Valine requirements for immune and growth responses in broilers from 3 to 6 weeks of age.
MedLine Citation:
PMID:  16641030     Owner:  NLM     Status:  MEDLINE    
Four experiments were conducted to evaluate valine (Val) requirements in Ross 508 broilers from 3 to 6 weeks of age. Common diets were fed to broilers until 3 weeks of age. Growth and carcass measurements were taken in all experiments. Immune responsiveness measurements were taken in Experiments 1 and 2. Birds given 7.2 g Val/kg of diet in Experiment 1 had more abdominal fat than birds given 8.2 g Val/kg of diet, but there were no differences in growth or other carcass measurements. Because growth performance was not reduced in birds given 7.2 g Val/kg of diet, Val concentration was reduced to 6.4 g Val/kg of diet in Experiments 2 and 3. Increasing Val from 6.4 to 8.7 g Val/kg of diet resulted in linear increases for BW gain, feed efficiency and Val intake in male birds, and Val intake in female birds. Quadratic responses to increasing dietary Val were not observed in any experiment. There were no effects of Val on innate or adaptive immunity. A nonessential amino acid mixture containing the same nitrogen content as the L-Val additions in Experiment 4 was added and tends to support the idea that the responses to Val were specific and not due to increases in total nitrogen. Dose responses to Val resulted in male, but not female, birds given 7.3 g Val/kg of diet having improved BW gain and feed efficiency compared with birds receiving 6.4 g Val/kg of diet.
S A Thornton; A Corzo; G T Pharr; W A Dozier Iii; D M Miles; M T Kidd
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  British poultry science     Volume:  47     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-27     Completed Date:  2006-07-03     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  190-9     Citation Subset:  IM    
Department of Poultry Science, Mississippi State University, MS, USA.
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MeSH Terms
Abdominal Fat
Animal Nutritional Physiological Phenomena
Chickens / growth & development*,  immunology*
Dietary Proteins / administration & dosage*,  metabolism
Dose-Response Relationship, Drug
Nutritional Requirements*
Random Allocation
Sex Factors
Valine / administration & dosage*,  metabolism
Weight Gain / drug effects,  physiology
Reg. No./Substance:
0/Dietary Proteins; 7004-03-7/Valine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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