Table 1.
Elements (including five isotope ratios) of flue-cured tobacco at a provincial scale (Yunnan Guizhou and Sichuan provinces). Mg, Al, K, and Mn concentrations are expressed in mg/g; Ga, Sn, Sb, Cs, Pr, Sm, Dy, Er, and Tl concentrations are expressed in μg/kg; all other elements concentrations are expressed in mg/kg.
| Provincial scale | YN (n = 84) | GZ (n = 52) | SC (n = 40) | P |
|---|---|---|---|---|
| Li | 2.2 ± 2.6b | 4.1 ± 5.2a | 3 ± 3.4ab | * |
| Na | 37.7 ± 35.1a | 22 ± 11.9b | 13.7 ± 35.6b | *** |
| Mg | 2 ± 2.6b | 4.5 ± 2.2a | 3.8 ± 1.6a | *** |
| Al | 0.3 ± 0.2a | 0.1 ± 0.05b | 0.2 ± 0.2a | *** |
| K | 7.3 ± 10.2b | 24.4 ± 5.3a | 25.8 ± 8.3a | *** |
| Cr | 0.5 ± 0.3a | 0.2 ± 0.1b | 0.5 ± 0.3a | *** |
| Mn | 0.2 ± 0.1a | 0.2 ± 0.1a | 0.3 ± 0.3a | ns |
| Co | 0.3 ± 0.2a | 0.3 ± 0.2a | 0.4 ± 0.4a | ns |
| Ni | 0.8 ± 0.4a | 0.5 ± 0.3b | 0.9 ± 0.8a | *** |
| Cu | 12.2 ± 7.1a | 6.1 ± 3.7b | 6 ± 4.2b | *** |
| Zn | 47.4 ± 13.8a | 45.4 ± 15.5ab | 37.8 ± 20.2b | ** |
| Ga | 73.4 ± 47.7a | 31.8 ± 17.2b | 91.3 ± 105.1a | *** |
| As | 0.3 ± 0.2a | 0.1 ± 0.04b | 0.1 ± 0.01b | *** |
| Se | 0.3 ± 0.6a | 0 ± 0.1b | 0.5 ± 0.3a | *** |
| Rb | 7.3 ± 5.0a | 3.6 ± 1.8b | 3.4 ± 1.9b | *** |
| Y | 0.4 ± 0.4a | 0.1 ± 0.1b | 0.4 ± 0.7a | *** |
| Cd | 5.6 ± 4.8a | 3.1 ± 2.2b | 2 ± 1.2b | *** |
| Sn | 61 ± 59.7a | 59.3 ± 30.7a | 63.2 ± 44.7a | ns |
| Sb | 41.2 ± 28.8a | 34.9 ± 16.4ab | 24.5 ± 28b | * |
| Cs | 62.3 ± 28.3a | 13.6 ± 8.7c | 32.5 ± 24.8b | *** |
| Ba | 25.7 ± 16b | 23 ± 11.3b | 35.9 ± 29.3a | ** |
| La | 0.9 ± 0.9ab | 0.3 ± 0.3b | 1.2 ± 2.8a | * |
| Pr | 114.1 ± 90.3a | 40.9 ± 27.4b | 149.1 ± 275.5a | ** |
| Nd | 0.4 ± 0.3a | 0.1 ± 0.1b | 0.5 ± 0.8a | *** |
| Sm | 69.4 ± 47.2a | 20.3 ± 11.5b | 69.7 ± 88.4a | *** |
| Dy | 48.3 ± 35.6a | 12.5 ± 6.8b | 42.4 ± 67.5a | *** |
| Er | 21.3 ± 15.5a | 6.4 ± 3.3b | 17.8 ± 27.6a | *** |
| Tl | 45.0 ± 23.8a | 42.1 ± 25.3a | 26.0 ± 19.5b | *** |
| Sr | 276.5 ± 327.7a | 64.6 ± 33.2b | 69.6 ± 39.7b | *** |
| Pb | 1.5 ± 1.5a | 1.2 ± 0.4a | 1 ± 0.9a | ns |
| 84/86Sr | 0.1 ± 0.01a | 0.1 ± 0.01a | 0.1 ± 0.01a | ns |
| 87/86Sr | 1.5 ± 0.5a | 1.2 ± 0.3b | 1.1 ± 0.2b | ** |
| 88/86Sr | 9.2 ± 0.1b | 9.2 ± 0.1b | 9.4 ± 0.2a | *** |
| 207/206Pb | 0.8 ± 0.01b | 0.8 ± 0.01b | 0.9 ± 0.01a | *** |
| 208/206Pb | 2.1 ± 0.05a | 2.1 ± 0.03b | 2.1 ± 0.02a | *** |
p-value of the ANOVA; ns: p-value > 0.05, *:0.05 > p-value > 0.01, **: 0.01 > p-value > 0.001, ***: p-value ≤ 0.001. Different letters on each variable denote differences between different geographical origins.