Table 1.
The main and interactive effects of CO2, N, and plant diversity (PD) on soil CO2 efflux measured from 1998 to 2009 based on repeated-measures mixed model across 296 plots
| F | P | |
| CO2 | 763.33 | <0.01 |
| N | 59.56 | <0.01 |
| PD | 692.89 | <0.01 |
| Year | 410.76 | <0.01 |
| CO2 × N | 4.63 | 0.03 |
| CO2 × PD | 13.99 | 0.01 |
| N × PD | 2.34 | 0.12 |
| CO2 × year | 9.02 | 0.01 |
| N × year | 15.69 | 0.01 |
| PD × year | 4.32 | 0.03 |
| CO2 × N × PD | 0.04 | 0.83 |
| CO2 × N × year | 3.73 | 0.05 |
| CO2 × PD × year | 3.02 | 0.08 |
| N × PD × year | 0.16 | 0.69 |
| CO2 × N × PD × year | 0.51 | 0.47 |
Significant (P < 0.05) effects are bolded.