Table 6.

Effect of Bacillus species–fermented products and essential oils on cecal microbial diversity of broilers.

								P value
	C1	A	SYN	EO	SYN+ EO	SEM	P value	SYN	EO	SYN × EO
Chao1	111.3	111.5	119.0	109.0	117.0	1.29	0.051	0.005	0.373	0.958
Fisher alpha	13.2ab	12.7b	14.3a	12.5b	13.4ab	0.20	0.016	0.010	0.031	0.918
Shannon	4.4c	4.5b	4.6ab	4.6ab	4.6a	0.02	< 0.001	< 0.001	0.001	< 0.001
Enspie	11.4b	13.2a	13.6a	14.1a	13.6a	0.23	< 0.001	0.004	< 0.001	< 0.001

^a-cMeans in the same row without common superscripts are significantly different (P ≤ 0.05).

¹C = Basal diet; A = Basal diet plus enramycin (10 mg/kg); SYN = Basal diet plus Bacillus species–fermented products; EO = Basal diet plus essential oils; SYN+EO = Basal diet plus Bacillus species–fermented products and essential oils.