Thesis - Open Access
Master of Science (MS)
Increasing feed costs in recent years have led researcher and producers to look to different sources for their feedstuffs. Many by-products of various industries have been studied to determine their potential as livestock feeds. One product that has been used to spare feed grains in the diet by increasing the total dietary energy and increasing feed efficiency. The amino acid lysine represents another opportunity to decrease food costs of swine diets when protein supplementation is costly. Lysine is the first limiting amino acid in most practical swine diets. The addition of lysine has proven effective in diets adequate in other nutrients but deficient in lysine. The purpose of the research conducted and summarized here was to study the effect of different levels of fat and lysine in diets adequate in other nutrients. Most studies indicate that increasing energy causes a decrease in feed consumption which increases the need for additional protein to meet total protein requirements. This study was designed to determine if a similar relationship exists for lysine and energy. Rate of grain, feed consumption, feed efficiency and blood urea nitrogen levels were the criteria evaluated for growing and finishing swine.
Library of Congress Subject Headings
Swine -- Feeding and feeds
Lysine in animal nutrition
Number of Pages
South Dakota State University
Girard, James L., "Lysine-Energy Relationships in Corn-Soybean Meal Diets for Growing and Finishing Swine" (1977). Electronic Theses and Dissertations. 5076.