FIGURE 6.

Compositions of cecal microbiota and differential species identified of broilers at phylum, family, and genus level on day 42. (A–C) were the bacterial community compositions at phylum, family, and genus level, respectively; (D,F,G) were significantly differential bacteria at phylum family and genus level, respectively and (E) was the ratio of the abundance of Firmicutes to Bacteroidetes. ^a,bValues at the same index with no common superscripts differ significantly (n = 8; P < 0.05). NC, negative control supplied with the basal diets; PC, positive control supplied with the basal diets and 5 mg/kg flavomycin; OA, the basal diets supplied with 0.3% (day 0–21) and 0.2% (day 22–42) organic acids feed additives.