Survey locations | Cu | Fe | Mn | Mo | Se | Zn |
---|---|---|---|---|---|---|
Baida Township (n = 2) | 3.879 ± 0.266 | 37.830 ± 3.564 | 13.195 ± 0.233 | 0.509 ± 0.001 | 0.005 ± 0.002 | 21.205 ± 2.355 |
Dalong Township (n = 3) | 4.251 ± 1.081 | 51.100 ± 16.190 | 13.487 ± 0.337 | 0.728 ± 0.352 | 0.002 ± 0.002 | 27.127 ± 1.947 |
Exi Township (n = 8) | 3.896 ± 0.732 | 52.531 ± 13.235 | 13.752 ± 0.687 | 0.217 ± 0.134 | 0.002 ± 0.001 | 22.913 ± 2.895 |
Kangsha Township (n = 9) | 4.166 ± 0.649 | 76.837 ± 25.168 | 13.548 ± 1.358 | 0.615 ± 0.371 | 0.003 ± 0.001 | 25.862 ± 3.973 |
Najiu Township (n = 15) | 3.424 ± 0.542 | 84.864 ± 25.234 | 14.099 ± 1.659 | 0.404 ± 0.212 | 0.002 ± 0.001 | 23.741 ± 2.950 |
Mali Township (n = 6) | 4.443 ± 0.835 | 58.553 ± 34.904 | 13.988 ± 1.826 | 0.729 ± 0.244 | 0.010 ± 0.004 | 22.345 ± 5.951 |
Shuodu Township (n = 15) | 3.129 ± 0.510 | 139.636 ± 70.124 | 14.966 ± 1.003 | 0.228 ± 0.109 | 0.002 ± 0.001 | 24.630 ± 1.937 |
Xinrong Township (n = 3) | 3.658 ± 0.480 | 107.737 ± 47.750 | 13.563 ± 0.388 | 0.566 ± 0.255 | 0.009 ± 0.011 | 23.823 ± 1.839 |
Yuxi Township (n = 2) | 4.735 ± 0.761 | 60.480 ± 2.560 | 14.440 ± 2.843 | 0.661 ± 0.082 | 0.021 ± 0.011 | 27.825 ± 8.365 |
Zhongyi Township (n = 4) | 3.223 ± 0.503 | 97.742 ± 33.756 | 13.497 ± 1.957 | 0.353 ± 0.066 | 0.003 ± 0.001 | 23.605 ± 3.362 |
Zituo Township (n = 18) | 3.223 ± 0.454 | 79.218 ± 42.378 | 13.644 ± 1.301 | 0.229 ± 0.120 | 0.001 ± 0.001 | 21.831 ± 1.210 |
Luolong County (n = 85) | 3.550 ± 0.677 | 81.170 ± 38.143 | 14.030 ± 1.419 | 0.350 ± 0.198 | 0.003 ± 0.006 | 23.580 ± 3.103 |
GB 2762–2017/GB 2715–2016 | 10 | 50 | – | – | 0.3 | 50 |