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Solvent-extracted germ meal for ruminants
Subsequent to corn wet milling, corn germ is subjected to an extraction process that yields corn oil and solvent-extracted germ meal. Other byproducts of corn wet milling are corn bran, steep liquor, and distillers solubles. corn bran and steep liquor are typically combined to produce corn gluten feed, which may include solvent-extracted germ meal and distillers solubles. Literature defining nutritional characteristics of solvent-extracted germ meal, and its value as ruminant feed, is not currently available. The objective of this research was to evaluate solvent-extracted germ meal as an individual feed ingredient, and when combined with steep liquor with distillers solubles, or corn bran and steep liquor with distillers solubles to simulate wet corn gluten feed. Corn wet milling byproducts were fed as a portion of the diet replacing dry-rolled corn in calf receiving diets, and finishing diets for steers and lambs. Variables measured were intake, dietary digestion, performance, and effects on ruminal acidosis. In lambs, solvent-extracted germ meal lowered dietary intake and digestibility, and feed efficiency relative to corn, although it promoted higher gains than a corn control diet in finishing yearling steers when comprising <50% of the dietary DM. An associative effect was observed when solvent-extracted germ meal was blended with steep liquor with distillers solubles (19% of dietary DM), which enhanced feed efficiency in finishing calves. As a component of wet corn gluten feed, solvent-extracted germ meal promoted greater gain/feed than corn bran, and both byproducts possessed less energy than steep liquor with distillers solubles. In 55%-concentrate calf receiving diets, replacing a portion of corn bran with solvent-extracted germ meal did not diminish intake or gain, but enhanced feed efficiency. The potential for acidosis in finishing cattle was diminished when byproducts replaced a portion of dietary corn. A combination of corn bran and steep liquor with distillers solubles offered greater protection from acidosis than when solvent-extracted germ meal was added to this blend, due to a lower dietary energy content.
Herold, Daniel Walter, "Solvent-extracted germ meal for ruminants" (1999). ETD collection for University of Nebraska - Lincoln. AAI9929204.