Table 4. Pearson’s coefficients correlation between soil C, N stocks and affecting factors.
| Depth (cm) | Forest type | Variable | pH | BD (g cm−3) | Age (years) | Elevation (m) | MAT (°C) | MAP (mm) |
|---|---|---|---|---|---|---|---|---|
| 0–10 | NF | C stock | 0.367 n.s | −0.628* | / | 0.098 n.s | −0.625* | −0.462 n.s |
| N stock | 0.349 n.s | −0.584* | / | 0.227 n.s | −0.623* | −0.371 n.s | ||
| PF | C stock | −0.065 n.s | 0.016 n.s | 0.588* | −0.591* | 0.433 n.s | 0.082 n.s | |
| N stock | 0.205 n.s | −0.270 n.s | 0.154 n.s | −0.537* | −0.478 n.s | −0.689** | ||
| 10–20 | NF | C stock | 0.468 n.s | 0.766** | / | 0.944** | −0.893** | −0.803** |
| N stock | 0.424 n.s | 0.849** | / | 0.973** | −0.836** | −0.722** | ||
| PF | C stock | −0.707** | −0.612* | 0.068 n.s | 0.461 n.s | −0.255 n.s | 0.198 n.s | |
| N stock | −0.733** | −0.607* | 0.518* | 0.251 n.s | −0.616* | −0.252 n.s |
Notes:
**
Correlation is significant at the 0.01 level.
*
Correlation is significant at the 0.05 level.
n.s, not significant; n = 15; BD, Bulk density; NF, Natural forest; PF, Plantation forest; MAT, Mean annual temperature; MAP, Mean annual precipitation.