Table 2.

Observed intake, nutrient digestibility, and energy availability in cows fed high and low intakes with two levels of monensin inclusion

	Lowa		High			Probabilityb
Item	0	200	0	200	SEM	Monensin	Intake
Number of observations	9	10	10	10
Intake, kg/d
DMI	3.54	3.49	5.12	5.22	0.081	0.75	<0.01
DOMI	2.24	2.21	3.10	3.23	0.064	0.45	<0.01
Digestibility, %
DM	68.0	67.8	65.1	66.4	0.72	0.43	<0.01
OM	69.2	69.0	66.1	67.5	0.78	0.41	<0.01
ADF	53.8	51.2	52.2	51.7	1.20	0.18	0.66
GE	66.9	66.6	63.5	65.2	0.80	0.37	<0.01
Energy availability, Mcal/kg DM
DE	2.92	2.91	2.77	2.84	0.040	0.44	<0.01
ME	2.40	2.39	2.27	2.33	0.033	0.44	<0.01
Energy intake, Mcal/d
GE	15.55	15.33	22.41	22.85	0.370	0.75	<0.01
DE	10.40	10.22	14.24	14.91	0.319	0.44	<0.01
ME	8.53	8.38	11.68	12.23	0.262	0.44	<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 > 0.18).