Table 5.

Observed intakes, nutrient digestibility, energy availability, passage rate, and ruminal fill of steers fed high and low intakes with two levels of monensin inclusion

	Lowa		High			Probabilityb
Item	0	200	0	200	SEMc	Monensin	Intake
Intake, kg/d
DMI	2.92	2.91	4.34	4.36	0.112	0.98	<0.01
DOMI	2.00	2.00	2.77	2.73	0.094	0.80	<0.01
Digestibility, %
DM	74.2	74.4	69.7	68.5	1.18	0.64	<0.01
OM	76.7	76.9	71.9	70.8	1.11	0.69	<0.01
ADF	59.4	58.1	53.8	51.2	1.30	0.16	<0.01
GE	75.2	75.4	70.7	69.8	1.19	0.74	<0.01
Energy availability, Mcal/kg DM
DE	2.90	2.90	2.70	2.66	0.052	0.74	<0.01
ME	2.38	2.38	2.21	2.18	0.043	0.74	<0.01
Energy intake, Mcal/d
GE	11.66	11.64	17.14	17.21	0.438	0.96	<0.01
DE	8.49	8.49	11.63	11.49	0.408	0.86	<0.01
ME	6.96	6.96	9.54	9.42	0.335	0.86	<0.01
Passage rate, %/h	1.88	1.51	2.44	2.29	0.107	0.03	<0.01
Ruminal DM fill, kg	3.51	4.18	4.54	4.90	0.236	0.05	<0.01
Ruminal DM fill, % of BW	1.15	1.39	1.54	1.64	0.053	<0.01	<0.01

DOMI = digestible organic matter intake.

^aLow = received 80% NRC requirements; high = received 120% NRC requirements; 0 = 0 mg/d monensin inclusion; 200 = 200 mg/d monensin inclusion.

^bMonensin = effect of 0 vs. 200; intake = effect of low vs. high; no treatment interactions (P > 0.22).

^c n = 4.