Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Animal Science


In the United States the swine industry contributes a great deal to the economy of the corn-belt farmer. On June 1, 1967, the U.S.D.A. Statistical Reporting Service reported 43,642,000 swine in the ten Corn Belt States, which produce three-fourths of the United States pig crop. South Dakota produced approximately 2,700,000 hogs in 1966 with a value of 137.5 million dollars, which is approximately 18.1% of the total farm income. In recent years the trend toward producing a fast-growing, efficient and meaty hog has necessitated that the nutritional regimen be changed to help express the hereditary potential of the modern meat type hog. In swine nutrition it is necessary to give special attention to protein quality and specifically to insure an adequate balance of amino acids. A corn-soybean meal type ration is most commonly fed to swine in the corn-belt area. Corn, like other cereal grains, is deficient in several of the ten essential amino acids required by the pig. Lysine appears to be the most limiting amino acid for pigs fed a corn-soybean meal ration. Considerable research has been conducted to determine the value of lysine supplementation in a corn-soybean meal diet. A series of trials were conducted to determine the value of supplemental lysine supplied at equal intakes through the drinking water or in the feed using a corn-soybean meal ration. The major objectives of this study were to investigate two different methods of lysine supplementation and to determine the effect of the amino acid lysine on growth, feed efficiency and carcass composition.

Library of Congress Subject Headings

Swine -- Feeding and feeds




South Dakota State University