Table 3.
The descriptive statistical analysis of 23 element contents (mg·kg−1) in the Jiulongchi wetland and the comparison with related studies.
| Element | Soil Samples | Plant Samples | Comparison with Related Studies | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | CV | Mean | SD | CV | FJM [6] | FJM [7] | Qinling Mts. [26] | BK Guizhou [19] | BK Hunan [19] | BK Sichuan [19] | BK China [19] | UCC [27] | |
| V | 154.67 | 13.81 | 0.09 | 31.33 | 32.62 | 1.04 | / | / | / | 138.8 | 105.4 | 96 | 82.4 | 98 |
| Zn | 92.32 | 17.74 | 0.19 | 65.69 | 17.76 | 0.27 | 39.6 | / | 91.41 | 99.5 | 94.4 | 86.5 | 74.2 | 65 |
| Cr | 179.37 | 28.02 | 0.16 | 32.95 | 34.51 | 1.05 | 51.3 | 46.35 | 43.96 | 95.9 | 71.4 | 79 | 61 | 126 |
| Co | 13.21 | 2.71 | 0.21 | 3.07 | 2.53 | 0.82 | / | / | / | 19.2 | 14.6 | 17.6 | 12.7 | 24 |
| Ni | 46.53 | 5.88 | 0.13 | 10.71 | 9.54 | 0.89 | / | / | 25.88 | 39.1 | 31.9 | 32.6 | 26.9 | 56 |
| Cu | 58.84 | 19.11 | 0.32 | 20.27 | 14.8 | 0.73 | 13.6 | 17.26 | 22.16 | 32 | 27.3 | 31.1 | 22.6 | 25 |
| As | 13.64 | 1.93 | 0.14 | 5.04 | 3.89 | 0.77 | 8.61 | 11.36 | 5.76 | 20 | 15.7 | 10.4 | 11.2 | 1.7 |
| Cd | 0.32 | 0.13 | 0.4 | 1.81 | 1.41 | 0.78 | 1.29 | 1.35 | 0.24 | 0.659 | 0.126 | 0.079 | 0.097 | 0.1 |
| Sb | 4.01 | 0.72 | 0.18 | 3.42 | 3.38 | 0.99 | / | / | / | 2.24 | 1.87 | 1.28 | 1.21 | 0.3 |
| Pb | 46.21 | 9.58 | 0.21 | 60.05 | 55.54 | 0.92 | 40.2 | 54.28 | 18.97 | 35.2 | 29.7 | 30.9 | 26 | 14.8 |
| Al | 84,682.56 | 6339.79 | 0.07 | 18,591.49 | 18,231.61 | 0.98 | / | / | / | 57,600 | 85,500 | 62,600 | 66,200 | 7.96% |
| Ba | 321.48 | 37.78 | 0.12 | 101.54 | 76.44 | 0.75 | / | / | / | 261 | 383 | 474 | 469 | 584 |
| Be | 1.26 | 0.12 | 0.1 | 0.26 | 0.26 | 0.99 | / | / | / | 2.29 | 2.19 | 2.18 | 1.95 | 2.4 |
| Ca | 5119.79 | 1910.75 | 0.37 | 3168.51 | 1282.43 | 0.4 | / | / | / | 6200 | 1300 | 11,300 | 15,400 | 3.85% |
| Fe | 47,859.66 | 6949.18 | 0.15 | 9594.22 | 9858.04 | 1.03 | 23554 | / | / | 41,700 | 39,600 | 33,000 | 29,400 | 4.32% |
| K | 14,720.27 | 2085.48 | 0.14 | 6368.08 | 3002.09 | 0.47 | / | / | / | 15,600 | 18,600 | 20,200 | 18,600 | 2.14% |
| Mg | 15,897.03 | 1980.79 | 0.12 | 3509.96 | 2567.65 | 0.73 | / | / | / | 7100 | 4000 | 8500 | 7800 | 2.20% |
| Mn | 462.38 | 254.68 | 0.55 | 363.72 | 342.11 | 0.94 | 262 | / | 696.14 | 794 | 459 | 657 | 583 | 716 |
| Na | 2807.48 | 369.82 | 0.13 | 696.11 | 632.11 | 0.91 | / | / | / | 900 | 1700 | 8500 | 10,200 | 2.36% |
| Sr | 50.07 | 6.28 | 0.13 | 16.23 | 8.9 | 0.55 | / | / | / | 53 | 44 | 120 | 167 | 333 |
| Ti | 4969.86 | 366.16 | 0.07 | 974.08 | 1015.27 | 1.04 | / | / | / | 6200 | 5200 | 4000 | 3800 | 4010 |
| Mo | 1.47 | 0.27 | 0.18 | 0.72 | 0.47 | 0.65 | 0.986 | / | / | 2.4 | 1.4 | 1 | 2 | 1.1 |
| Tl | 0.58 | 0.07 | 0.13 | 0.23 | 0.12 | 0.51 | / | / | / | 0.712 | 0.61 | 0.548 | 0.62 | 0.52 |
Note: The background value of Chongqing city was included in Sichuan Province; the number of soil samples and plant samples are 20 and 10 respectively. SD, Standard deviation; CV, Coefficient of Variation; FJM, Fanjing Mountain; UCC, Earth’s Upper Continental Crust; BK, Background Value.