Figure 2

Community analysis of bacterial 16S OTUs in six soil types (R1.25.CF, R1.25.IF, R1.25.OF, R2.25.CF, R2.25.IF, and R2.25.OF). (A) The α- diversity was estimated by the number of observed species Sobs and Shannon–Wiener index (H’). The diversity was significantly higher in the R1 than R2 systems under same fertilization treatment. R2.25.OF and R2.25.IF was also substantially higher than R2.25.CF, respectively, based on Wilcoxon’s signed rank statistics (one-tailed), and: *P < 0.05 was found between different treatment. (B) Count-based distance metrics based on Bray–Curtis dissimilarity and Jaccard index for principal coordinate analysis (PCoA) were visualized in biplots. Soils treated with OF and CF were located on the opposite site of the second PCo axis, while the IF soils fall in between.