Table 3.
Phosphorus K-edge XANES fitting results showing the relative percent of each phosphate speciesa in the studied soils under different land uses (means ± standard errors, n = 4)b.
| Land uses | IHP | TCP | DCP | MCP | HAP | FePO4 |
|---|---|---|---|---|---|---|
| % | ||||||
| Roadside | 50 ± 3 b | 47 ± 3 a | 0 a | 0 a | 3 ± 3 a | 0 a |
| Native grasslands | 92 ± 5 a | 0 b | 6 ± 3 a | 0 a | 0 a | 2 ± 2 a |
| Tame grasslands | 82 ± 4 a | 3 ± 3 b | 2 ± 2 a | 2 ± 2 a | 7 ± 4 a | 3 ± 3 a |
| Annual Crop | 67 ± 17 ab | 24 ± 19 ab | 2 ± 2 a | 0 a | 4 ± 4 a | 3 ± 3 a |
aIHP, inositol hexakisphosphate; TCP, tricalcium phosphate; DCP, dibasic calcium phosphate; MCP, monobasic calcium phosphate; HAP, hydroxyapatite. bValues in each column followed by the same lowercase letters are not significantly different according to LSD (P < 0.05).