Protist community changes induced by fertilizations. (a) UniFrac-weighted principle coordinate analysis (PCoA) of soil protist community in the four fertilizer treatments and (b) relative abundance of five main protist taxonomic groups (Stramenopiles, Alveolata, Rhizaria, Excavata and Amoebozoa) with coarse phylogenetic affinities in the four fertilizer treatments. CF, chemical fertilizer; OF, organic matter fertilizer; OF+B, Bacillus enriched organic fertilizer; OF+T, Trichoderma enriched organic fertilizer. Different letters above the bars indicate a significant difference at the 0.05 probability level according to the Tukey’s test.