Research Article
Estimating Salt Concentrations Based on Optimized Spectral Indices in Soils with Regional Heterogeneity
Table 4
Statistical characteristics of the eight major ions in sampling area soil (g·kg−1).
| Field sites | Statistics | K+ | Na+ | Ca2+ | Mg2+ | Cl− | SO42− | HCO3− | CO32− |
| Ebinur Lake Basin | Max | 0.852 | 158.661 | 16.248 | 1.236 | 182.232 | 60.519 | 2.814 | 0.723 | Min | 0.005 | 0.678 | 0.048 | 0.010 | 0.496 | 0.284 | 0.281 | 0.000 | Mean | 0.230 | 10.089 | 3.124 | 0.276 | 8.303 | 12.841 | 1.699 | 0.014 | SD | 0.170 | 21.328 | 3.629 | 0.252 | 24.768 | 12.957 | 0.661 | 0.100 |
| Ugan-Kuqa Oasis | Max | 3.776 | 161.776 | 16.012 | 16.566 | 205.900 | 127.770 | 4.784 | 1.000 | Min | 0.002 | 0.040 | 0.028 | 0.023 | 0.000 | 0.182 | 0.844 | 0.000 | Mean | 0.563 | 48.294 | 4.948 | 1.803 | 46.365 | 23.043 | 2.357 | 0.018 | SD | 0.684 | 55.599 | 4.133 | 3.619 | 57.746 | 24.353 | 0.880 | 0.134 |
| Keriya Oasis | Max | 1.390 | 72.581 | 11.124 | 2.152 | 82.833 | 36.429 | 4.784 | 0.000 | Min | 0.002 | 0.004 | 0.040 | 2.152 | 0.000 | 0.072 | 0.281 | 0.000 | Mean | 0.284 | 6.341 | 3.366 | 0.385 | 6.916 | 12.505 | 2.039 | 0.000 | SD | 0.260 | 11.114 | 2.936 | 0.462 | 11.971 | 10.209 | 0.862 | 0.000 |
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