Table 9.
Contents of heavy metals in vegetables and rice grown in soils in the vicinity of sample pig farms.
| Crop | TN (g kg−1) | TP (g kg−1) | Cu (mg kg−1) | Zn (mg kg−1) | Cd (mg kg−1) | Pb (mg kg−1) | |
|---|---|---|---|---|---|---|---|
| Vegetable | Range | 3.76–3.84 | 0.40–0.57 | 0.38–0.64 | 5.92–66.23 | 0.01–0.10 | 0.04–0.14 |
| Mean | 3.77 | 0.47 | 0.49 | 33.15 | 0.05 | 0.08 | |
| Paddy | Range | 0.85–1.70 | 0.27–0.40 | 4.08–8.96 | 25.14–38.74 | ND | ND |
| Mean | 1.18 | 0.33 | 6.74 | 27.81 | ND | ND |
ND: not detected. The concentrations of heavy metals in vegetable were calculated on a fresh weight base, and water content of vegetable was 92% on average.