Further Studies on the Riboflavin Requirements of the Chicken

Hunt, Charles H.; Winter, A. R.; Bethke, R. M.

doi:10.3382/ps.0180330

Cited by 29 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This ration apparently was not particularly low in riboflavin, however, since the addition of 100 microgram percent 1 of riboflavin was sufficient to produce normal growth. However, it is considerably below the total requirement reported later by Heuser et al (1938) and Hunt et al (1939).…”

Section: Control Experimentalmentioning

confidence: 66%

The Use of Distillers’ By-Products in Poultry Rations

Sloan

1941

Poultry Science

View full text Add to dashboard Cite

Section: Control Experimentalmentioning

confidence: 66%

The Use of Distillers’ By-Products in Poultry Rations

Sloan

1941

Poultry Science

View full text Add to dashboard Cite

“…An explanation for this seasonal drop in production might be that hens had obtained added riboflavin through coprophagy, but that adverse temperature prevented any large increase of the riboflavin content of the fecal mat- ter during the winter months. The work of Hunt, Winter, and Bethke (1939) showed that a ration which analyzed 80 ug per 100 grams resulted in a complete cessation of egg production when the experimental birds were confined to batteries. The conflicting data would indicate that the actual riboflavin requirements of hens for normal egg production has not been definitely established.…”

Section: T Was Reported Bymentioning

confidence: 99%

Effect of Riboflavin Intake on Egg Production and Riboflavin Content of Eggs

1947

View full text Add to dashboard Cite

“…Lepkovsky et al (1938) showed the relationship between laying hen diet, egg riboflavin concentrations, and various embryonic deficiency signs by measuring albumen riboflavin concentrations by a photometric assay. Hunt et al (1939) showed that the riboflavin requirement for maximum hatchability was higher than that for egg production. Norris and Bauernfeind (1940) noted that there appeared to be an upper limit to the amount of riboflavin deposited in eggs.…”

Section: Introductionmentioning

confidence: 96%

Vitamin Profiles of Eggs as Indicators of Nutritional Status in the Laying Hen: Riboflavin Study

Squires¹,

Naber²

1993

Poultry Science

View full text Add to dashboard Cite

Two experiments determined the effect of dietary riboflavin supplementation on egg yolk and albumen riboflavin concentrations, egg production, egg weight, shell thickness, hen weight, hatchability, incidence of clubbed down, and incidence of hemorrhagic embryos. In the first experiment, hens were fed rations containing 1.55, 2.20, 4.40, and 8.80 mg of riboflavin/kg of diet for 27 wk. Significant (P < .05) depressions in both yolk and albumen riboflavin concentrations were noted at the two lower riboflavin levels after 1 wk. Egg production, egg weight, hatchability, and hen weight were all significantly depressed by the two lower riboflavin levels later in the experiment when compared with the two higher levels. Results indicate that egg riboflavin concentrations are related to important production parameters that may be used to predict future dietary riboflavin inadequacies. In the second experiment, hens were fed either an unsupplemented diet or a riboflavin-adequate diet. Measurements of egg albumen riboflavin content, egg production, hatchability, and embryo abnormalities were made twice each week. Results showed depressed albumen riboflavin concentrations and hatchability and increased incidence of hemorrhagic embryos and clubbed down without changes in egg production during the 4- to 7-day period following feeding of the unsupplemented diet. These results show that low albumen riboflavin content immediately affect hatchability and embryonic development. The estimated minimum critical albumen riboflavin concentrations needed to support maximum reproductive function are between 1.9 and 2.9 micrograms of riboflavin/g of egg albumen. These critical values might be used to evaluate riboflavin status of laying and breeding flocks.

show abstract

Further Studies on the Riboflavin Requirements of the Chicken

Cited by 29 publications

References 9 publications

The Use of Distillers’ By-Products in Poultry Rations

The Use of Distillers’ By-Products in Poultry Rations

Effect of Riboflavin Intake on Egg Production and Riboflavin Content of Eggs

Vitamin Profiles of Eggs as Indicators of Nutritional Status in the Laying Hen: Riboflavin Study

Contact Info

Product

Resources

About