Fig. 1From: Effects of tobacco plant residue return on rhizosphere soil microbial communityMicrobial diversities of tobacco rhizospheres with the CK and PT treatments based on 16S and ITS sequencing (a bacterial Richness index, b bacterial Shannon index, c fungal Richness index, d fungal Shannon index). CK and PT represent the control treatment and tobacco residue treatment, respectively, similarly hereinafter. * < 0.05; ** < 0.01Back to article page