Figure 4.
Alpha diversity boxplots from the rhizosphere microbial communities (order level) at the V15 stage: (A) total species richness, (B) Faith’s phylogenetic diversity, (C) Shannon index, and (D) Reciprocal Simpson index (1/D). Boxplots with the same letter or in absence are not significantly different (p < 0.05). Treatments: C, Control; F, Urea-topdressing fertilization at V5; I, A. brasilense inoculant on seeds sowing; FI, F + I; S, Maize stover coverage; FS, F + S; IS, I + S; FIS, F + I + S.
