Fig. 4

Analysis of significant differences between groups of dominant phyla in different treatments. Abbreviations: The relative abundances of Acidobacteria (A), Proteobacteria (B), Chloroflexi (C), Gemmatimonadetes (D), Bacteroidetes (E), and Actinobacteria (F) under the comparison among biochar treatments (H0B, H1B, H2B, and H3B), biofertilizer treatments (H0J, H1J, H2J, and H3J), and control (H0T, H1T, H2T, and H3T)