Abstract
Estimating the Net Energy Value of Expelled, Extruded Soybean Meal When Fed to Nursery Pigs
Highlights
Oil is extracted from soybeans using either solvent or mechanical extraction
Extracted or expelled soybean meal (MSBM) typically has increased concentrations of fat and decreased concentrations of essential AA compared to Solvent-extracted soybean meal (SSBM), but Mechanically extracted or expelled soybean meal (MSBM) has been demonstrated to have improved AA digestibility
The SSBM has an NRC2 NE value of 946 kcal/lb and the 0% MSBM diet was formulated to 1091 kcal/lb and NE was not balanced between diets
Summary
Oil is extracted from soybeans using either solvent or mechanical extraction. Soybean meal is a byproduct of the soy oil extraction process. Soy oil is primarily extracted with the use of a hexane mixture running through soybean flakes that had previously been cracked and dehulled. This process is capable of removing up to 97.5% of the oil contained in soybeans, leaving as little as 0.5% of oil in the remaining meal.[3] Because of the efficiency of the solvent extraction process, this is commonly used in soybean crush facilities. For the mechanical extraction process, the oil is extracted using an expeller press. Because of the mechanical nature of the expelling process, soybeans may or may not be dehulled prior to oil extraction
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