Table 2. Soil chemical properties of the park soils collected in urban and suburban areas in Shanghai.
| Soil properties | Urban park soils | Suburban park soils |
|---|---|---|
| pH | 7.71 ± 0.07 b | 8.25 ± 0.04 a |
| Soil organic carbon (g kg−1) | 18.98 ± 1.23 a | 14.46 ± 1.23 b |
| Total nitrogen (g kg−1) | 1.33 ± 0.09 a | 0.93 ± 0.12 b |
| Total phosphorus (g kg−1) | 0.70 ± 0.02 a | 0.75 ± 0.03 a |
| Total potassium (g kg−1) | 18.26 ± 0.38 b | 20.89 ± 0.41 a |
| Available nitrogen (mg kg−1) | 88.80 ± 5.70 b | 114.06 ± 8.44 a |
| Available phosphorus (mg kg−1) | 17.33 ± 3.21 a | 8.05 ± 1.26 b |
| Available potassium (mg kg−1) | 215.80 ± 15.04 a | 230.09 ± 18.66 a |
| Available copper (mg kg−1) | 10.32 ± 0.77 a | 8.66 ± 0.35 a |
| Available lead (mg kg−1) | 9.00 ± 0.60 a | 4.68 ± 0.29 b |
| Available cadmium (mg kg−1) | 0.12 ± 0.02 a | 0.07 ± 0.003 a |
| Available chromium (mg kg−1) | 0.06 ± 0.04 a | 0.008 ± 0.003 b |
| Available nickel (mg kg−1) | 0.46 ± 0.03 a | 0.39 ± 0.03 a |
| Available zinc (mg kg−1) | 11.38 ± 1.33 a | 2.99 ± 0.17 b |
| Available arsenic (mg kg−1) | 0.18 ± 0.01 a | 0.17 ± 0.01 a |
Note:
a, b means significant differences between soil samples at P < 0.05.