Effects of dietary supplementation with TA on the colonic bacterial community structure and relative abundance with statistical difference of weaning piglets. In the phylum level, relative abundance with statistical difference among the three groups (A). In the class level, relative abundance with statistical difference among the three groups (B). In the order level, relative abundance with statistical difference among three groups (C). In the family level, relative abundance with statistical difference among three groups (D). In the genus level, relative abundance with statistical difference among three groups (E). a,bMeans of the bars with different letters are significantly different among groups (P < 0.05).