J. Anim Sci.
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J. Anim Sci. 1983. 57:729-738.
© 1983 American Society of Animal Science
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Preservation of Wet Distillers Grains and its Value as a Protein Source for Growing Ruminants1

S. M. Abrams2, T. J. Klopfenstein3, R. A. Stock3, R. A. Britton3 and M. L. Nelson3

University of Nebraska, Lincoln 68583

Abstract

Four experiments were conducted to evaluate different methods of preserving wet distillers grains (WDG). In Exp. 1, WDG were ensiled with Ca(OH)2 or NH4OH, and with and without sugar or a silage inoculant. Alkali additions, irrespective of source, resulted in a butyric acid fermentation with smaller amounts of acetate and propionate produced. Fermentation did not occur in the absence of alkali. Ensiling tended to increase soluble N and decrease lactate present in WDG. In Exp. 2, a lamb intake and digestion trial, diets supplemented with a combination of urea and soybean meal (SBM) or distillers grains were consumed more readily than diets supplemented with urea alone. Dry matter digestibility was higher when SBM provided supplemental N and Ca(OH)2-ensiled WDG yielded higher intakes than NH4OH-ensiled WDG. In Exp. 3, a lamb growth trial under restricted feeding conditions, gains were greater when distillers grains and urea were providing supplemental N than when SBM and urea or urea alone were supplying supplemental N. Gains for urea, SBM-urea, dry distillers grains-urea, WDG-urea, Ca(OH)2-ensiled WDG-urea were 53.5, 72.5, 84.0, 94.1 and 114 g/d, respectively. In Exp. 4, a 112-d steer growth trial, steers supplemented with SBM-urea, WDG-urea or Ca(OH)2 -ensiled WDG-urea had increased daily gains (.58, .60, .52 vs .42 kg/d; P<.05) and better feed conversion (P<.05) than steers fed a diet supplemented with urea. Steers fed WDG-urea had larger

Footnotes

1 Published with the approval of the Director as Paper No. 6741. Journal Ser., Nebraska Agr. Exp. Sta.

2 Present address: U.S. Regional Pasture Research Lab., University Park, PA 16802

3 Dept. of Anim. Sci.






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Copyright © 1983 by the American Society of Animal Science.