Study on rhizosphere soil microbial diversity of cucumber

The composition of fungal communities at the phylum level is depicted in Figure 5D. The phylum Ascomycota exhibited the highest abundance in groups CK1, CK2, and T1, whereas its abundance decreased in group T2. Abundance of the phylum Chytridiomycota was significantly higher in group CK2 compared to group CK1 (p < 0.05). In groups T1 and T2, abundance of both Chytridiomycota and Rozellomycota was significantly lower than that in group CK2 (p < 0.05), while abundance of Mortierellomycota and Basidiomycota in group T2 was significantly higher than that in groups CK2 and T1 (p < 0.05).The composition of fungal communities at the genus level is illustrated in Figure 5E. Abundance of Trichoderma and Penicillium in group CK2 was significantly lower than that in the CK1 group, which received sterile water treatment, while abundance of Betamyces was significantly higher than that in the other three groups (p < 0.05). In group T1, abundance of Phialemonium, Pseudeurotium, and Penicillium was significantly higher than that in group CK2 (p < 0.05), with no significant difference observed in the abundance of Fusarium compared to group CK2. Moreover, in group T2, abundance of Trichoderma, Linnemannia, and Trichosporon was significantly higher than that in groups CK2 and T1, whereas abundance of Fusarium was significantly lower than that in groups CK2 and T1 (p < 0.05).The composition of bacterial communities at the phylum level is depicted in Figure 6D. Proteobacteria, Bacteroidetes, Actinobacteria, Acidobacteria and Verrucomicrobia were the dominant bacteria in all treatment groups. Compared with other treatment groups, abundance of Proteobacteria in group T2 was significantly increased (p < 0.05). At the same time, abundance of Bacteroidetes, Actinobacteria, Acidobacteria and Ver-rucomicrobia was significantly decreased (p < 0.05).The composition of bacterial communities at the genus level is illustrated in Figure 6E. Compared with CK1 group, abundance of Acinetobacter in CK2 group was significantly increased (p < 0.05), while abundance of Bdellovibrio and Brevifollis was significantly decreased (p < 0.05). Abundance of Bacillus, Streptomyces and Mizugakiibacter in T1 group was significantly higher than that in CK2 group (p < 0.05), while the abundance of Pseudomonas in T1 group was significantly lower than that in CK2 group (p < 0.05). Abundance of Bacillus, Pseudomonas, Burkholderia, Parcubacteria, Comamonas, Sediminibacterium and Rhodanobacter in T2 group was significantly higher than that in CK2 and T1 groups (p < 0.05). Abundance of Streptomyces, Rhizomicrobium and Mizugakiibacter was significantly lower than that of CK2 and T1 groups (p < 0.05).