Table 6.

Effect of Clostridium butyricum on rumen microbiota in heifers.

Items	Treatment a		SEMb	P -value
	CON	CB		Treat	Time	Treat × Time
F. succinogenes	1.03	1.25	0.112	0.21	0.58	0.43
R. flavefaciens	1.03	1.91	0.138	0.0001	0.001	0.001
R. albus	1.02	1.67	0.218	0.04	0.003	0.003
B. fibrisolvens	1.01	1.53	0.148	0.02	0.68	0.73
P. ruminicola	1.02	1.30	0.128	0.14	0.31	0.30
R. amylophilus	1.07	3.60	0.663	0.01	0.89	0.89
S. bovis	1.00	2.06	0.218	0.003	<0.0001	<0.0001

R. flavefaciens, Ruminococcus flavefaciens; R. albus, Ruminococcus albus; F. succinogenes, Fibrobacter succinogenes; B. fibrisolvens, Butyrivibrio fibrisolvens; S. bovis, Streptococcus bovis; P. ruminicola, Prevotella ruminicola; R. amylophilus, Ruminobacter amylophilus.

^aCON, control diet; CB = 2 ×10⁸ CFU/kg of dry matter intake.

^bSEM, Standard error of the mean.