Table 4.
Revised OLS models generated in the multiple regression analyses between vegetation recovery and soil C, N, P and K cycles.
| Cover | Biomass | Richness | Diversity | REC | |
|---|---|---|---|---|---|
| C cycling | |||||
| B | 0.18 | 0.069 | — | — | −0.083 |
| SEB | 0.13 | 0.13 | 0.11 | ||
| K cycling | |||||
| B | 0.38*** | 0.30*** | 0.27* | — | 0.29*** |
| SEB | 0.097 | 0.08 | 0.12 | 0.071 | |
| N cycling | |||||
| B | — | — | 0.33* | 0.49*** | 0.33** |
| SEB | 0.15 | 0.13 | 0.10 | ||
| P cycling | |||||
| B | — | — | 0.43** | — | — |
| SEB | 0.15 | ||||
| Constant | |||||
| B | 0.044 | −0.0089 | 9.53 | 0.0071 | 0.036 |
| SEB | 0.19 | 0.16 | 1.80 | 0.13 | 0.16 |
| AR (1) | |||||
| B | 0.67*** | 0.63*** | 0.44*** | 0.32** | 0.73*** |
| SEB | 0.082 | 0.089 | 0.095 | 0.10 | 0.075 |
| Adjusted R2 | 0.64 | 0.61 | 0.53 | 0.28 | 0.72 |
| Pf | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| SEE | 0.60 | 0.59 | 0.68 | 0.85 | 0.43 |
| n | 94 | 94 | 95 | 95 | 95 |
Notes: The autocorrelation was eliminated using the generalized difference method in EViews version 8. REC denotes the general index of vegetation recovery. AR (1) denotes the estimated values of the coefficients for first-order autocorrelation. ***Pt < 0.001; **Pt < 0.01; *Pt < 0.05. Pt denotes p value of the t-test for an individual regression coefficient. The other abbreviations are as presented in Table 1.