Table 2. Loading value of PCA of retting solution samples based on the composition of bacterial communities.

	No. of OTU	Represented family	Represented genus	Loading value
PC1	63 ± 3.01	Clostridiaceae_1	Clostridium_sensu_stricto_1	−0.73
	59 ± 2.82	Bacillaceae	Bacillus	−0.34
	88 ± 3.86	Pseudomonadaceae	Azotobacter	0.52
PC2	38 ± 1.21	Enterobacteriaceae	Enterobacter	0.84
	59 ± 1.95	Bacillaceae	Bacillus	−0.43

Absolute loading values greater than 0.3 were used to indicate significance among OTUs.