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Supplementing Rations with Folic Acid, Lysine, Inositol, Biotin, and Ergostanyl Acetate for the Young Pig¹

State College of Washington

Abstract

Variable results were obtained in supplementing natural rations with folic acid depending on the protein content of the ration. With rations containing 14.3 to 15.1 percent protein, folic acid supplementation tended to increase the rate of gain and the efficiency of feed utilization. With rations containing 16.4 to 18.4 percent protein, folic acid supplementation was of no benefit in increasing rate of gain. With the lower protein content rations, folic acid stimulates appetite causing the pigs to consume more feed, thus indicating a relationship between protein level and folic acid needs of the pig.

Folic acid supplementation of the various natural rations studied was of no benefit in hemoglobin formation.

With the pig, under the conditions of this experiment, there was no interrelationship between folic acid and lysine.

With a methionine low ration, biotin was of no benefit in promoting efficiency of feed utilization.

Ergostanyl acetate, a guinea pig "antistiffness factor," was of no benefit in curing or alleviating a stiffness which is characteristic of pigs kept on concrete floors.

¹ Published as Scientific Paper No. 803. Agricultural Experiment Stations, Institute of Agricultural Science, State of College of Washington. These studies were supported in part by a grant from Lederle Laboratories, Pearl River, N.Y.

² Present address is Department of Animal Industry, University of Florida, Gainesville, Florida.

We are indebted to Dr. D. F. Green and Merck & Co., Rahway, New Jersey, for supplying biotin and inositol. The cooperation of Dr. T. H. Jukes and Lederle Laborities, Pearl River, N. Y., in supplying folic acid an ergostanyl acetate is gratefully appreciated. The lysine was obtained through the courtesy of Dr. Raphael Schillinger, Inter-chemical Corporation, Union, New Jersey.