Influence of Soybean Meal or Increasing Levels of Barley

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Influence of Soybean Meal or Increasing Levels of Barley Supplementation on Intake, Ruminal Fermentation, Site of Digestion, In Situ Forage Degradibility, and Duodenal Amino Acid Flow in Steers Fed Bromegrass Hay1 S. L. BOYLES*,2, PAS, J. S. CATON†, and D. M. SIME† *Department of Animal Sciences, The Ohio State University, Columbus, OH 43210, and †Department of Animal and Range Sciences, North Dakota State University, Fargo, ND 58105 barley based supplements fed at rates of 822 g/d (B8), 1645 g/d (B16), or 2467 g/d (B24). The soybean meal suppleFive ruminally and duodenally ment was fed to provide a similar cannulated steers (average initial BW amount of nitrogen as B8. Forage dry 329 ± 17 kg) were used in a 5 × 5 latin matter intake (in kilograms) was greater square to evaluate soybean meal or (P