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Use of Condensed Soybean Solubles in Nonruminant Diets¹

Purdue University², West Lafayette, IN 47907

Abstract

Four experiments using 300 male weanling rats and two growing-finishing experiments using 192 crossbred pigs were conducted to determine the substitution value of condensed soybean solubles (CSS), a by-product of isolated soybean protein production. Experiments were designed so that added CSS (up to 30% of the diet) replaced either corn alone or corn and soybean meal on an isonitrogenous basis.

In every experiment, rats or pigs fed diets containing various levels of CSS (0 to 30%) gained similarly and had comparable feed to gain ratios. The high moisture content of CSS may present a problem when feeding high levels; but from a nutritional standpoint, CSS can be substituted for corn alone or for corn and soybean meal on an isonitrogenous basis in amounts up to 10% of the diet and probably even larger amounts without adversely affecting performance.

¹ Journal Paper No. 6190, Purdue University Agricultural Experiment Station.

² Department of Animal Science.