Beef

Digestibility of Diets with Corn Grain and Urea Replaced with Corn Distillers Grains or Solubles

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Abstract

Ten steers were used in a digestion experiment to evaluate replacing dry rolled corn and urea with 4% and 8% condensed distiller solubles (CDS), or 10% and 20% wet corn distillers grain with solubles (DGS). The steers were placed in digestion crates for total collection of feces during a 5 d period following 14 d of diet adaptation. Intake (kg/d) of DM, starch, NDF, ADF, CP, and fat were: 7.99, 8.71, 8.62 & 8.41, 7.84; 4.92, 4.87, 4.93, & 4.81, 3.95; 1.19, 1.25, 1.19, & 1.42, 1.42; 0.43, 0.48, 0.45, & 0.56, 0.55; 0.96, 1.08, 1.03, & 1.03, 1.03; 0.27, 0.36, 0.43, & 0.43, 0.50; for 0%, 4%, 8% CDS and 10%, 20% DGS. Respective apparent digestibility of DM, starch, NDF, ADF, CP, and fat were 79, 78, 76 & 77, 76; 97, 94, 95, & 95, 94; 53, 53, 46 & 52, 56; 41, 45, 37, & 48, 50; 72, 72, 70, & 69, 69; 63, 66, 65, & 68, 75. Replacing corn and urea with distillers coproducts did not affect DM intake or digestibility of NDF, ADF, or CP, but did increase fat intake. Feeding DGS decreased starch intake and increased NDF and ADF intake. The steers fed 20% DGS had lower starch intake than the control diet and along with 4% CDS diet had lower starch digestibility compared with the control diet. Steers fed 8% CDS had lower DM digestibility. Steers fed 20% DGS had a significantly higher fat digestibility. The results of this study suggest that 8% CDS tended to decrease digestibility, probably as a result in increased fat intake. Replacing a portion of corn and urea with wet DGS increased digestibility of NDF, ADF and fat indicating these components were more digestible in the DGS than the control diet. I

Keywords: ASL R2069

How to Cite:

Pingel, D. & Trenkle, A. H., (2006) “Digestibility of Diets with Corn Grain and Urea Replaced with Corn Distillers Grains or Solubles”, Iowa State University Animal Industry Report 3(1). doi: https://doi.org/10.31274/ans_air-180814-488