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. 2023 Jul 26;13:12119. doi: 10.1038/s41598-023-39030-8

Figure 9.

Figure 9

Effects of N addition on C/N (a), C/P (b) and N/P (c) of rhizosphere and non-rhizosphere soils. Note: 1. The C/N, C/P and N/P refer to carbon–nitrogen ratio, carbon-phosphorus ratio and nitrogen-phosphorus ratio of 20 cm depth of rhizosphere and non-rhizosphere soils respectively. 2. Different lowercase letters above the bars on same treatment represent significant differences between rhizosphere and non-rhizosphere soils at P < 0.05 level. 3. The note below are the same.