Table 2.

Estimators of diversity with Jinjiang cattle's ruminal bacteria.

Item	Dietary treatments			P-value1
	HF	HC	HCN	P1	P2	P3
Observed OTU2	724	705	627	ns	*	+
Chao	836	832	772	ns	ns	ns
ACE	841	818	762	ns	ns	ns
Shannon index	4.96	4.35	4.52	**	**	ns

HF = high-forage diet; HC = high-concentrate diet; HCN = HC + niacin diet; OTU = operational taxonomic units.

¹P1 = HC vs. HF; P2 = HCN vs. HF; P3 = HC vs. HCN; “ns” means P > 0.1; “+” means P < 0.1; “*” means P < 0.05; “**” means P < 0.01.

²At 97% similarity.