Table 4.

Mean in vitro starch digestibility of different concentrate sources inoculated or not with a Bacillus-based direct-fed microbial in experiment 2^1,2

Concentrate source	Treatments		SEM	P-value3
	CON	DFM		T	T × H
High-density barley	71.3	76.3	0.80	<0.0001	<0.0001
Low-density barley	63.9	75.6	1.02	<0.0001	<0.0001
Corn	52.5	55.7	0.75	<0.01	0.41
Sorghum	37.0	42.0	0.91	<0.001	0.22
Wheat	67.9	75.6	0.54	<0.0001	<0.0001

IVSD was analyzed at 6 and 12 h post-direct-fed microbial inoculation.

DFM, Bacillus-based direct-fed microbial inoculated in the rumen fluid (B. licheniformis and B. subtilis; Bovacillus, Chr. Hansen A/S, Horsholm, Denmark).

T, main treatment effect; T × H, treatment × hour interaction.