Figure 3

DGGE separation patterns of PCR amplified 16S rDNA fragments from rhizosphere soil samples (a) and cluser analysis diagram of DGGE profiles (b) with different treatments (S: control; SB: soil amended with B38; SC: soil amended with corn straw-derived biochar; SCB: soil amended with corn straw-derived biochar and B38; SP: soil amended with pig manure-derived biochar; SPB: soil amended with pig manure-derived biochar and B38).