Department of Animal Science


Date of this Version

January 2002


Published in 2002 Nebraska Beef Cattle Report. Copyright © 2001 The Board of Regents of the University of Nebraska.


Three experiments were conducted with yearling steers to evaluate diet digestibility effects on N volatilization from open-dirt feedlot pens. Digestibility was decreased by increasing dietary corn bran. Corn bran was fed at 0%, 15%, or 30% of diet DM. Intakes increased linearly and ADG decreased linearly as bran inclusion increased. Manure N was increased linearly and N volatilization decreased from 74% to 54% during October to May as bran increased. No differences were observed for N balance from May to October. Decreasing diet digestibility had variable results on manure N and volatilization depending on time of year.