Table 2.
Correlation coefficients (Pearson r value) between soil physicochemical properties and enzyme activities in surface horizon (0–20 cm) of Changwu County (n = 245).
| Invertase | Urease | Phosphatase | Catalase | Dehydrogenase | |
|---|---|---|---|---|---|
| OM | 0.547** | 0.386** | 0.580** | −0.06 | 0.469** |
| Total N | 0.300** | 0.431** | 0.243** | 0.255** | 0.03 |
| Total P | −0.06 | 0.317** | −0.176** | 0.315** | −0.325** |
| Total K | 0.11 | 0.11 | 0.12 | −0.213** | 0.246** |
| Alkali-hydrolyzable N | 0.393** | 0.192** | 0.486** | −0.462** | 0.552** |
| Available P | 0.05 | 0.366** | 0.09 | −0.186** | −0.02 |
| Available K | 0.00 | 0.358** | 0.147* | 0.09 | −0.06 |
| CEC | 0.11 | 0.291** | −0.13 | 0.718** | −0.322** |
| Clay | 0.11 | 0.127* | 0.02 | 0.297** | −0.10 |
| pH | −0.167** | −0.380** | 0.05 | −0.529** | 0.154* |
∗ and ∗∗ represent statistical significances at the 5% and 1% levels, respectively; OM, organic matter; N, nitrogen; P, phosphorous; K, potassium; and CEC, cation exchange capacity.