Document Detail


The amino acid requirements of the preruminant calf.
MedLine Citation:
PMID:  427084     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. Ten calves (50--58 kg live weight) were given a diet consisting of diluted whole milk, wheat gluten and supplemented with appropriate nutrients including amino acids but deficient in lysine. The lysine reequirements of these calves, which were growing at approximately 0.25 kg/d, were estimated from responses to lysine supplementation of this diet. From plasma urea, plasma lysine, nitrogen retention and apparent digestibility of N responses the estimated lysine requirements were 8.5, 7.5, 7.2 and 7.6 g/d respectively. 2. From the mean lysine requirement (7.8 g/d) and the ratio, lysine: otheressential amino acids in carcasses of similar calves the estimated requirements were (g/d): methionine 2.1, cystine 1.6, threonine 4.9, valine 4.8, isoleucine 3.4, leucine 8.4, tyrosine 3.0, phenylalanine 4.4, histidine 3.0, arginine 8.5, tryptophan 1.0.
Authors:
A P Williams; D Hewitt
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The British journal of nutrition     Volume:  41     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  1979 Mar 
Date Detail:
Created Date:  1979-06-29     Completed Date:  1979-06-29     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  311-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Amino Acids, Essential / metabolism*
Animal Nutritional Physiological Phenomena*
Animals
Body Weight
Cattle / metabolism*
Lysine / metabolism
Male
Nitrogen / metabolism
Nutritional Requirements
Chemical
Reg. No./Substance:
0/Amino Acids, Essential; 56-87-1/Lysine; 7727-37-9/Nitrogen

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


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