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. 2022 Jun 10;13:926592. doi: 10.3389/fmicb.2022.926592

FIGURE 2.

FIGURE 2

Treatment means of soil microbial marker genes (log10 copies/μg DNA), including bacterial (Bacteria) and archaeal (Archaea) 16S rRNA, fungal ITS region (Fungi), nifH, archaeal (AOA) and bacterial (AOB) amoA, nirK, nirS, and nosZ-I separated by N fertilization rate (Nrate), with their standard errors of the mean as whiskers. Asterisks indicate the level of significance associated with the probability value from analysis of variance of the factors (*p < 0.1, **p < 0.05). Nrate treatment levels were: 0, 202, and 269 kg N/ha.