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Feeding Value and Net Energy for Gain of Spent Sulfite Liquor for Beef Cattle^1,2,

Washington State University,³ Pullman 99163

Abstract

Eighteen Hereford steers individually housed and fed were utilized to study the effects of incorporating 8 and 12% spent sulfite liquor (SSL) into finishing rations. No significant differences in average daily gains were detected between the control and SSL groups. Feed efficiencies (kg feed/kg gain) were similar for the control and the 8% SSL group, but slightly lower for the 12% SSL treatment group. Incorporation of SSL into the rations did not affect carcass characteristics or carcass grade of the experimental animals. Net energy for gain (NEg) of SSL was determined by the difference trial procedure involving the determination of energy gained by the animals comparing initial and final body composition. The NEg of SSL, on a dry matter basis, was determined to be .74 and 1.40 Meal per kilogram when fed at the 8 and 12% levels, respectively. The difference in the NEg value of SSL when fed at different levels in the rations was attributed to interactions of SSL with the molasses or other ingredients of the experimental rations.

¹ Scientific Paper No. 4319. College of Agriculture Research Center, Washington State University. Project No. 3217.

² Appreciation is extended to ITT-Rayonier, Inc., for partial support of this study.

³ Department of Animal Sciences.