Table 2.
Trace metal concentrations in the tissues of faba bean plants grown for 80 days in soil amended with sewage sludge. CV: coefficient of variance.
| Tissue | Value | Trace metal concentration (mg kg−1) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Al | Co | Cr | Cu | Fe | Mn | Ni | Pb | Zn | ||
| Roots | Minimum | 11109.3 | 11.5 | 81.8 | 15.4 | 10474.3 | 297.0 | 36.6 | 12.9 | 37.0 |
| Maximum | 19333.8 | 27.5 | 192.6 | 44.1 | 19556.4 | 788.4 | 70.8 | 37.3 | 166.9 | |
| Mean (n = 36) | 15962.0 | 19.8 | 133.6 | 27.7 | 15492.1 | 555.6 | 57.6 | 27.8 | 102.8 | |
| CV (%) | 15.3 | 20.5 | 22.9 | 33.1 | 15.7 | 27.2 | 18.4 | 28.4 | 39.1 | |
| Stems | Minimum | 13348.1 | 32.6 | 4.5 | 5.6 | 425.5 | 33.4 | 45.3 | 26.7 | 12.3 |
| Maximum | 19086.6 | 46.0 | 7.7 | 11.3 | 744.6 | 68.4 | 62.4 | 38.3 | 35.5 | |
| Mean (n = 36) | 16919.1 | 40.2 | 5.9 | 8.5 | 617.0 | 47.8 | 55.9 | 33.9 | 25.3 | |
| CV (%) | 10.1 | 10.0 | 12.3 | 21.5 | 11.6 | 24.5 | 9.4 | 10.3 | 28.2 | |
| Leaves | Minimum | 15755.1 | 43.2 | 4.5 | 7.4 | 344.0 | 107.0 | 45.8 | 30.7 | 23.8 |
| Maximum | 19226.1 | 51.2 | 7.8 | 14.6 | 1165.8 | 367.7 | 60.8 | 38.3 | 58.9 | |
| Mean (n = 36) | 17811.3 | 46.6 | 6.2 | 10.6 | 812.7 | 248.9 | 52.8 | 35.1 | 40.6 | |
| CV (%) | 5.4 | 4.8 | 16.7 | 21.4 | 29.9 | 35.0 | 9.1 | 6.1 | 23.3 | |
| Fruits | Minimum | 139.3 | 8.3 | 1.2 | 12.7 | 202.6 | 40.9 | 4.7 | 0.4 | 34.7 |
| Maximum | 492.2 | 14.5 | 4.4 | 23.6 | 1212.6 | 123.6 | 10.9 | 2.5 | 69.0 | |
| Mean (n = 36) | 231.4 | 10.9 | 2.0 | 17.2 | 377.1 | 77.3 | 6.8 | 0.9 | 48.5 | |
| CV (%) | 43.5 | 13.0 | 45.9 | 16.3 | 65.3 | 35.3 | 28.8 | 66.7 | 19.8 | |