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. 2021 Jul 16;12:693535. doi: 10.3389/fmicb.2021.693535

FIGURE 4.

FIGURE 4

Major functional genes involved in the N cycle and total relative abundance of genes involved in N metabolism in soils treated with or without bacterial inoculums (relative abundance > 0.001%). Different lowercase letters and asterisks represent the significant effects of bacteria inoculums on the relative abundance of genes involved in the N cycle at p < 0.05. Error bars are ± standard error. CK: fertilized with basic fertilizer containing NPK fertilizers and composted cow manure; B. cepacia ISOP5: fertilized with basic fertilizer and then applied with suspension of strain B. cepacia ISOP5; R. palustris ISP-1: fertilized with basic fertilizer and then applied with suspension of strain R. palustris ISP-1; MB: fertilized with basic fertilizer and then applied with suspensions of B. cepacia ISOP5 and R. palustris ISP-1.