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. 2021 May 26;12:630418. doi: 10.3389/fmicb.2021.630418

FIGURE 2.

FIGURE 2

Relative abundance (%) of the dominant phyla of bacteria (A) and fungi (B) in the bulk and rhizosphere soils of soybean. Different letters above the columns denote significant differences among the treatments in the bulk or rhizosphere soil at p < 0.05, lowercase letters for the bulk soil and uppercase letters for the rhizosphere. CK, control; CS, wheat straw addition; LB, low biochar addition; HB, high biochar addition; BCF, biochar compound fertilizer.