Table 2.
Spatial distribution of Cd and Pb in plant tissues under wastewater irrigation at selected sites of Multan and Faisalabad.
| Crops | No. Samples | Underground parts (mg kg−1) |
Aerial parts (mg kg−1) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Cd |
Pb |
Cd |
Pb |
||||||
| Mean ± S.E | Range | Mean ± S.E | Range | Mean ± S.E | Range | Mean ± S.E | Range | ||
| Brassica oleracea | 13 | 3.26 ± 0.12 | 2.70–4.07 | 3.83 ± 0.17 | 2.78–5.20 | 1.86 ± 0.13 | 1.15–2.49 | 1.92 ± 0.18 | 1.28–3.06 |
| Brassica campestris | 12 | 3.13 ± 0.08 | 2.77–3.65 | 2.73 ± 0.24 | 1.77–3.82 | 2.13 ± 0.07 | 1.75–2.58 | 1.97 ± 0.13 | 1.44–2.47 |
| Brassica rapa | 6 | 2.53 ± 0.05 | 2.38–2.64 | 3.63 ± 0.12 | 3.06–3.80 | 0.9 ± 0.14 | 0.73–1.62 | 1.6 ± 0.20 | 1.28–2.57 |
| Allium cepa | 6 | 3.48 ± 0.13 | 2.88–3.79 | 3.79 ± 0.03 | 3.68–3.89 | 0.63 ± 0.29 | 0.32–2.09 | 2.46 ± 0.04 | 2.37–2.60 |
| Solanum lycopersicum | 5 | 3.65 ± 0.19 | 3.18–4.04 | 14.6 ± 0.22 | 14.03–15.34 | 2.23 ± 0.02 | 2.18–2.28 | 4.73 ± 0.15 | 4.23–5.12 |
| Solanum tuberosum | 15 | 2.35 ± 0.12 | 2.01–3.00 | 5.61 ± 0.07 | 5.23–5.95 | 0.59 ± 0.08 | 0.28–1.07 | 2.24 ± 0.13 | 1.63–2.99 |
| Spinacia oleracea | 3 | 3.34 ± 0.09 | 3.18–3.48 | 2.64 ± 0.13 | 2.43–2.88 | 2.14 ± 0.04 | 2.09–2.23 | 1.07 ± 0.03 | 1.02–1.13 |
| Daucus carota | 22 | 2.58 ± 0.08 | 1.95–3.31 | 4.56 ± 0.17 | 2.84–5.95 | 0.95 ± 0.10 | 0.41–1.69 | 1.85 ± 0.07 | 1.38–2.44 |
| Allium sativum | 8 | 2.48 ± 0.03 | 2.34–2.60 | 4.65 ± 0.03 | 4.58–4.84 | 0.89 ± 0.06 | 0.70–1.17 | 1.75 ± 0.14 | 1.37–2.23 |
| Pisum sativum | 17 | 2.61 ± 0.16 | 1.63–3.90 | 4.56 ± 0.14 | 3.65–5.25 | 1.1 ± 0.15 | 0.25–2.17 | 2.92 ± 0.23 | 1.95–4.39 |
| Triticum aestivum | 38 | 2.54 ± 0.12 | 1.37–4.00 | 4.42 ± 0.27 | 2.06–8.00 | 0.63 ± 0.10 | 0.20–2.00 | 1.37 ± 0.15 | 0.35–2.96 |
| Medicago sativa | 20 | 4.03 ± 0.19 | 3.10–5.36 | 10.47 ± 0.66 | 5.12–14.00 | 2.16 ± 0.15 | 1.07–2.93 | 5.67 ± 0.55 | 1.99–10.74 |
| Saccharum officinarum | 18 | 2.88 ± 0.12 | 2.10–3.40 | 7.81 ± 0.79 | 3.46–14.47 | 0.63 ± 0.11 | 0.19–1.34 | 0.89 ± 0.27 | 0.21–3.71 |
| Zea mays | 12 | 3.37 ± 0.05 | 3.19–3.76 | 7.46 ± 0.35 | 5.74–9.85 | 2.26 ± 0.07 | 2.02–2.78 | 4.6 ± 0.13 | 3.78–5.20 |
| Sorghum bicolor | 29 | 3.66 ± 0.19 | 2.12–5.23 | 7.7 ± 0.77 | 2.51–13.70 | 2.47 ± 0.17 | 1.01–3.80 | 4.51 ± 0.51 | 1.18–9.12 |
| Trifolium alexandrinum | 14 | 2.44 ± 0.17 | 1.51–3.51 | 4.36 ± 0.20 | 2.52–5.16 | 1.06 ± 0.14 | 0.43–2.23 | 1.88 ± 0.11 | 1.07–2.41 |
| Minimum | 2.35 ± 0.12 | 1.37 | 2.64 ± 0.13 | 1.77 | 0.59 | 0.19 | 0.89 | 0.21 | |
| Maximum | 4.03 ± 0.19 | 5.36 | 14.6 ± 0.22 | 15.34 | 2.47 | 2.18 | 5.67 | 4.23 | |
| Range | 2.35–4.03 | 1.37–5.36 | 2.64–14.6 | 1.77–15.34 | 0.59–2.47 | 0.19–2.18 | 0.89–5.67 | 0.21–4.23 | |