The lysine requirement of pigs as suggested by the National Research Council (NRC) was determined using corn-soybean meal based diets. More recent research has indicated that differences exist in the availability of lysine in different ingredients. It has been suggested that lysine in barley is less available than lysine in corn. Thus, it is possible that diets formulated with barley and soybean meal to meet the NRC's suggested lysine requirement, might actually be deficient in this amino acid. This study was conducted to determine the lysine needs of pigs fed barley-soybean meal diets from approximately 45 to 75 lb.
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Agricultural Experiment Station, South Dakota State University
Wahlstrom, R. C.; Thaler, R. C.; and Borg, B. S., "Lysine Supplementation of Barley-Soybean Meal Diets for Growing Pigs" (1984). South Dakota Swine Field Day Proceedings and Research Reports, 1984. 7.