Table 9.

Relative abundances of intestinal bacteria at phylum level of Ningdu yellow chickens %.

Items	Additive amount of TCP					SEM	P value
	0.0%	0.2%	0.4%	0.6%	0.8%		ANOVA	Linear	Quadratic
Bacteroidota	58.23b	70.11a	70.08a	73.20a	68.07a	1.548	0.005	0.028	0.001
Firmicutes	21.78	17.66	18.06	14.89	20.15	0.955	0.167	0.374	0.082
Fusobacteriota	4.64	1.93	0.27	0.30	0.08	0.719	0.199	0.025	0.043
Euryarchaeota	3.27	1.25	0.98	3.46	2.40	0.530	0.517	0.899	0.652
Proteobacteria	2.08	1.36	1.42	2.09	2.68	0.327	0.741	0.406	0.377
Desulfobacterota	2.99	2.72	2.54	1.41	1.20	0.309	0.223	0.017	0.060
Verrucomicrobiota	0.63	0.24	0.69	0.22	1.25	0.261	0.749	0.517	0.528
Campylobacterota	1.10	0.62	0.45	1.22	0.64	0.173	0.613	0.795	0.898
WPS-2	0.07	0.02	0.92	0.02	0.13	0.143	0.316	0.910	0.632
Unidentified_Bacteria	2.12a	1.38ab	1.37ab	1.27ab	0.96b	0.131	0.036	0.004	0.011

Values are the means and SEM of 12 broilers (2 broilers per replicate).

^a–bMeans within a row lacking a common superscript differ significantly (P < 0.05).

Abbreviations: SEM, standard error of the mean; TCP, traditional Chinese prescription.