Fig. 3

The diversity of bacterial communities, including OTU (A), ACE (B), Chao1 (C), Simpson (D) and Shannon indexes (E). The diversity of microeukaryotic communities, including OTU (F), ACE (G), Chao1 (H), Simpson (I) and Shannon indexes (J). Y0, Y1, and Y2 represent planting years of 0, 1, and 2 years, respectively. Different lowercase letters indicate significant differences (p < 0.05).