Table 2 The forward selection results of environmental variables that best explains the variations in bacterial structure and predictive functions from rhizosphere and bulk soil samples using the canonical correspondence analysis
From: Structural diversity of bacterial communities in two divergent sunflower rhizosphere soils
| Â | Soil property | Explains % | Contribution % | F | P |
|---|---|---|---|---|---|
Bacterial structure | OM (%) | 93.4 | 93.4 | 28.3 | 0.102 |
| Â | N-NH4 (mg/kg) | 85.7 | 85.7 | 12.0 | 0.048 |
| Â | pH | 75.0 | 75.0 | 6.0 | 0.292 |
| Â | Total N (%) | 28.7 | 28.7 | 0.8 | 0.354 |
| Â | Total C (%) | 42.0 | 42.0 | 1.4 | 0.054 |
| Â | N-NO3 | 11.2 | 11.2 | 0.3 | 0.522 |
Predictive functional category | OM (%) | 74.9 | 74.9 | 6.0 | 0.31 |
| Â | N-NH4(mg/kg) | 53.8 | 53.8 | 2.3 | 0.35 |
| Â | pH | 75.7 | 75.7 | 6.2 | 0.338 |
| Â | Total N (%) | 7.7 | 7.7 | 0.2 | 1 |
| Â | Total C (%) | 27.3 | 27.3 | 0.8 | 0.696 |
| Â | N-NO3 | 14.0 | 14.0 | 0.3 | 0.842 |