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

This Article Full Text (PDF) A correction has been published 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 McWard, G. W. Articles by Jensen, A. H. Search for Related Content PubMed Articles by McWard, G. W. Articles by Jensen, A. H.

The Lysine Requirement of Weanling Swine at Two Levels of Dietary Protein

Illinois Agricultural Experiment Station, Urbana

Abstract

Weanling pigs weighing about 30 lb. were individually fed semi-purified diets containing either 12.8 or 21.7% protein to determine the response to varied levels of lysine. The source of protein was sesame seed meal supplemented with L-histidine. Supplementary lysine was added as L-lysine monohydrochloride.

The rate of gain at the two levels of protein was similar, but the lysine requirement varied with the level of protein fed. At 12.8%. protein the pig required 0.71% lysine in the diet or 5.55% of the dietary protein; and, at 21.7% protein the lysine need was 0.95% of the diet or 4.38% of the dietary protein. Assuming a linear relationship between dietary protein and lysine need, expressed as a percentage of the protein, the need within the protein range studied may be expressed by the equation, Y=7.23–0.131, where Y is the lysine need and is the percent of dietary protein.

Expressed as a percent of the total digestible nutrients, the lysine required in the low- and high-protein diets was 0.86 and 1.19%, respectively.

¹ The authors wish to acknowledge Merck & Co., Rahway, New Jersey; E. I. du Pont de Nemours & Co., Wilmington, Delaware; The Dow Chemical Co., Midland, Michigan, and Chas. Pfizer & Co.,Inc., Brooklyn, New York, for funds and products which made this study possible.