Animal Science Department


Date of this Version

January 1998


Published in 1998 Nebraska Swine Report, compiled by Duane E. Reese, Associate Professor and Extension Swine Specialist, Department of Animal Science. Prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. Published by Cooperative Extension Division, Agricultural Research Division, and Institute of Agriculture and Natural Resources at the University of Nebraska-Lincoln.
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Three experiments were conducted to examine different protein sources for segregated, early weaned (SEW) pigs. Protein sources evaluated included extruded soybeans, extruded-expelled soybeans, solvent-extracted soybean meal and spray-dried egg product as a substitute for spray-dried plasma protein. Performance differences among the four treatments could not be detected after seven weeks (two week experimental period and five week common corn-soybean meal diet). The cost of gain was reduced during the two-week treatment period by feeding diets with reduced plasma protein levels with or without the partial or complete substitution of spray-dried egg product. In addition, SEW pigs consuming the diet containing 20 percent soybean meal and 6 percent spray-dried plasma performed similarly to pigs receiving a more conventional SEW nursery diet (10 percent soybean meal, 6 percent spray-dried plasma protein). These experiments suggest egg protein and soybean proteins may be used for SEW pigs without significantly decreasing nursery performance over a seven-week period. The role of plant protein sources in diets for SEW pigs needs to be reevaluated.