HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Beeson, W. M. Articles by Mertz, E. T. Search for Related Content PubMed Articles by Beeson, W. M. Articles by Mertz, E. T.

Quantitative Threonine Requirement of the Weanling Pig¹

Purdue University Agricultural Experiment Station

Abstract

Semi-purified diets containing corn and appropriate supplements of essential amino acids and other nutrients have been used to determine the threonine requirement of the weanling pig. When the diet contained 0.2, 0.4, 0.5, 0.6, or 0.7 percent L-threonine maximum gain and feed efficiency were realized with the 0.4 percent level. This value represents 3.0 percent of the crude protein.

The high quality of the protein in the corn-amino acid rations was shown by a protein efficiency of 3.1 pounds of gain per pound of crude protein. When the proper amounts and balance of essential amino acids were supplied, weanling pigs (weight 25 lb.) grew at a normal rate at a level of 13.2 percent crude protein in the diet.

¹ Contribution from the Departments of Animal Husbandry and Agricultural Chemistry, Purdue University, Lafayette, Indiana, as Journal Paper No. 695.

² The authors are grateful to Dr. J. Waddell, E. I. du Pont de Nemours & Company, Newark, Delaware, for the DL-lysine HCl and to Dr. W. Colby, Dow Chemical Company, Midland, Michigan, for supplying several amino acids.