Table 1.
The relationships of microbial community functional structure to plant and soil characteristics by RDA and VPAa
| All genes detected | C cycling genes | N cycling genes | ||
|---|---|---|---|---|
| With nine selected variables |
First axis explanation (%) |
19.1 |
20.3 |
19.6 |
| |
Total explanation (%) |
42.2 |
42.8 |
42.8 |
| |
F |
1.138 |
1.167 |
1.163 |
| |
p |
0.098 |
0.072 |
0.087 |
| Explanations of the selected plant variables (%) |
Total |
24.7 |
24.6 |
25.1 |
| |
The number of plant functional groups (PFG) |
5.9 |
4.5 |
5.1 |
| |
Belowground plant C percentage (BPC) |
4.4 |
4.5 |
4.5 |
| |
Biomass of C4 plant species Andropogon gerardi (BAG) |
4.4 |
3.7 |
4.5 |
| |
Biomass of C4 plant species Bouteloua gracilis (BBG) |
3.7 |
4.5 |
3.8 |
| |
Biomass of legume plant species Lupinus perennis (BLP) |
6.0 |
6.0 |
6.4 |
| Explanations of the selected soil variables (%) |
Total |
19.4 |
19.0 |
19.7 |
| |
Soil N% at the depth of 0-10 cm (SN0-10) |
5.7 |
5.2 |
4.5 |
| |
Soil N% at the depth of 10-20 cm (SN10-20) |
4.4 |
4.5 |
5.1 |
| |
Soil C and N ratio at the depth of 10–20 cm (SCNR10-20) |
4.4 |
4.5 |
3.8 |
| pH | 4.4 | 5.2 | 5.1 |
a The covariables for plant and soil variables were close zero.