Table 2: MSE Vs Rumensin/Tylan - 1995 and 1996 feedlot trials.

University of Nebraska, Panhandle Research Center, Dr. Burt Weichenthal

Rumensin-Tylan

MSE

No. of pens

12

12

No. of steers

96

94

Initial weight, lb

835

838

Final weight, lbb

1267

1298

Daily gain, 130 d, lbb

3.32 c

3.55 d

Feed DM intake, lb

22.36

22.62

Feed/gain

6.77 c

6.39 d

Hot carcass weight, lb

785 c

805 d

Dressing percent

63.06 e

63.66 f

Fat thickness, in

0.42

0.41

Rib eye area, in2

13.6 e

13.9 f

Rib eye area, in.2 / cwt carc.

1.7

1.7

Marbling score

5.29

5.24

Quality grade

18.5

18.3

Percent Choice

63.6

58.3

Yield grade

2.48

2.41