PSVII-1 Effect of the Sequence of Feeding Forage and Concentrate-Based Diets on dry Matter Intake and Average Daily Gain of Growing Angus Bulls

Abstract The objective of this experiment was to determine the effects diet type and sequence on average daily gain (ADG) feed intake (DMI) in Angus bulls. Diets were concentrate (CONC; 58% dry-rolled corn, 18% Sweet Bran, 9% prairie hay, 5% alfalfa 10% supplement) forage (FOR; 60% 30% supplement). bulls (n=19; initial BW = 293 ± 10.3 kg) placed individual pens assigned receive FOR followed by CONC (FC; n=9) or (CF; n=10). Cattle transitioned respective diets over 21 days acclimated treatment for 10 days. Each period 56 measured consecutive at beginning end every 14 during each period. Data analyzed using a mixed model (SAS 9.4) including fixed diet, sequence, interaction. Diet treated as repeated measure. Pearson correlations also performed within groups. There × interaction (P < 0.01) DMI, indicating that difference DMI smaller when cattle consumed before FOR. correlation only significant FC group (r 0.72; P 0.03). x 0.02) ADG, while ADG greater feeding, between sequence. ADG:DMI ratio but not affected 0.96). These data indicate estimates do depend strongly feeding diets, two does.