QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Miller, C. O. Articles by Davey, R. Search for Related Content PubMed PubMed Citation Articles by Miller, C. O. Articles by Davey, R.

The Riboflavin Requirement of Swine for Reproduction

Bureau of Animal Industry, U. S. Department of Agriculture, Beltsville, Maryland

Diets containing 0.55, 0.83, 1.25 and 1.65 mg of riboflavin per pound were fed to sows in an experiment designed to determine the riboflavin requirements for reproduction.

The adequacy of a given riboflavin level was determined by the reproductive performance of the sows in terms of farrowing and weaning results.

The level of 0.55 mg of riboflavin per pound of feed did not meet the requirement for optimum growth and was inadequate for reproduction.

The level of 0.83 mg of riboflavin per pound of feed appeared to be barely adequate for the gestation period but deficient for optimum lactation.

The level of 1.25 mg of riboflavin per pound of feed gave near optimum results for gestation and lactation.

The level of 1.65 mg of riboflavin per pound of feed gave slight improvement over the 1.25-mg level but the results were not conclusive.

A level of 1.25 mg of riboflavin per pound of feed is indicated as the practical minimum recommended allowance for breeding gilts and sows. Swine diets based on commonly used grains supplemented to afford the prescribed levels of protein and minerals will generally be adequate in riboflavin.