Document Detail

The study of riboflavin requirement in broiler chickens.
MedLine Citation:
PMID:  9789764     Owner:  NLM     Status:  MEDLINE    
Riboflavin status indices in tissues (brain, liver, heart) and blood plasma, and performance parameters were studied in male and female broiler chickens in response to a wide range of dietary supplementation of riboflavin in order to establish the requirement for riboflavin in fast growing modern broilers. The birds fed riboflavin supplemented diets were increasing their body weight at a higher rate than those fed the unsupplemented diet, but this was apparent only during the first stage of growth (days 1 to 21). Supplementation of 2 mg riboflavin per kg was sufficient to support the maximum growth rate. Feed consumption was not affected by different levels of dietary supplementation of riboflavin. The supplementation of riboflavin in the diet increased (p < 0.001) plasma riboflavin level, but the magnitude of response decreased with age. The main component in the tissues was FAD, followed by FMN and riboflavin. Overall, the dietary riboflavin supplementation had highly significant (p < 0.001) effects on tissue FAD, FMN, and riboflavin status, but the effect of supplementation was clearly pronounced only at days 7 and 14, and thereafter the status of FAD, FMN, and riboflavin in the tissues did not differ between unsupplemented and supplemented birds. Neither FAD, FMN, and riboflavin nor GSSG-RED activity correlate with the level of supplementation. Saturation levels of riboflavin in the blood plasma and tissues, corresponded with dietary riboflavin levels of supplementation at 1 to 2 mg per kg. Based on the performance and biochemical data, the dietary requirement of riboflavin for fast growing broilers should be set at a level of 5 mg/kg. The currently recommended allowance of 3.6 mg riboflavin per kg of ration is not sufficient for modern breeds of broiler chickens.
A A Olkowski; H L Classen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal for vitamin and nutrition research. Internationale Zeitschrift für Vitamin- und Ernährungsforschung. Journal international de vitaminologie et de nutrition     Volume:  68     ISSN:  0300-9831     ISO Abbreviation:  Int J Vitam Nutr Res     Publication Date:  1998  
Date Detail:
Created Date:  1999-01-04     Completed Date:  1999-01-04     Revised Date:  2007-02-21    
Medline Journal Info:
Nlm Unique ID:  1273304     Medline TA:  Int J Vitam Nutr Res     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  316-27     Citation Subset:  IM    
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada.
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MeSH Terms
Animal Feed / analysis
Body Weight
Brain / enzymology,  metabolism
Dietary Supplements
Enzyme Activation
Feeding Behavior
Flavin Mononucleotide / metabolism
Flavin-Adenine Dinucleotide / metabolism
Glutathione Reductase / metabolism
Liver / enzymology,  metabolism
Myocardium / enzymology,  metabolism
Nutritional Requirements
Riboflavin / analysis,  blood,  metabolism*
Reg. No./Substance:
146-14-5/Flavin-Adenine Dinucleotide; 146-17-8/Flavin Mononucleotide; 83-88-5/Riboflavin; EC Reductase

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