Effect of Roasting Temperature on Utilization of Soybean Meal by Ruminants
Plegge, Steven Dudley
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Permalink
https://hdl.handle.net/2142/70004
Description
Title
Effect of Roasting Temperature on Utilization of Soybean Meal by Ruminants
Author(s)
Plegge, Steven Dudley
Issue Date
1982
Department of Study
Animal Sciences
Discipline
Animal Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Animal Culture and Nutrition
Abstract
Dehulled soybean meal (SBM) was roasted through a continuous flow roaster to determine the effect of roasting temperature on utilization of SBM-nitrogen (N) by ruminants. Studies were conducted to measure the effect of roasting temperature on N digestibility, animal performance and the proportion of SBM-N escaping degradation in the rumen. Soybean meal was roasted to 102, 128, 144, 159 and 185 C. Roasting to 128 C or beyond reduced (P .05) for nonroasted, 102, 128, 144 and 159 C SBM. True N digestibility, measured in growing lambs, was reduced (P .05) for nonroasted, 102, 128 and 144 C SBM. True N digestibilities for nonroasted, 102, 128, 144 and 159 C SBM. True N digestibility, measured in growing lambs, was reduced (P .05) for nonroasted, 102, 128 and 144 C SBM. True N digestibilities for nonroasted, 102, 128, 144 and 159 C SBM were: .99, .99, .91, .93 and .6, respectively. The proportion of SBM-N escaping degradation in the rumen was increased (P .05) by roasting. Flow of acid detergent insoluble N (ADIN) was increased (P .05) for nonroasted, 115 and 130 C SBM. Feeding 145 C SBM to growing steers did not alter (P > .05) daily gain, dry matter intake or efficiency of gain compared to feeding nonroasted SBM with medium energy diets. Roasting appears to be an effective means of protecting SBM from ruminal degradation without depressing intestinal digestibility. However, roasting was not effective in improving steer performance in three growing trials.
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