Table 1: 2nd Rumensin/Tylan Vs MSE Feedlot Trial

University of Nebraska, Panhandle Research Center

	Rumensin-Tylan	MSE a
No. of pens	6	6
No. of steers	51	51
Initial weight, lb	810	814
Daily gain, 84day,lb	4.04	4.19
Final weight, lbb	1,284	1,305
Daily gain, 139d, lbb	3.41	3.54
Feed DM intake, lb	21.82	21.91
Feed/gain	6.41	6.19
Hot carcass weight, lb	796	809
Dressing percent	63.58	63.96
Fat thickness, in	0.31	0.29
Rib eye area, in2	14.3 c	14.6 d
Rib eye area, in.2 / cwt carc.	1.8	1.8
Marbling scoree	5.07	4.97
Quality gradef	18.2	18
Percent Choice	51	45.3
Yield grade	2.05	1.92
Liver abscesses, %	13.2	11.3

• a) MSE = Multiple Stabilized Enzymes, an enzyme-microbial feed product of Natur's Way, Inc., Horton, KS.
  
• b) Final weight and daily gain were calculated by dividing hot carcass weight by a common dressing % (62).
  
• c, d) Means differ (P < .06).
  
• e) Marbling scores; Small begins at 5.0, Modest at 6.0.
  
• f) Quality grade scores; Select+ = 18, Choice- = 19.