Table 3.
Effects of different added dosages of Si on the pH values, CEC, and concentrations of available Ca and available Na of soil 3.
| Treatments | mg kg−1 |
pH | CEC | Ca | Na |
|---|---|---|---|---|---|
| Cmol(+) kg−1 | mg kg−1 | mg kg−1 | |||
| Control | 0 | 5.40 ± 0.12d | 9.9 ± 0.3c | 207 ± 19de | 42.4 ± 5e |
| MS | 220 | 5.65 ± 0.14cd | 12.5 ± 0.3a | 169 ± 11de | 177 ± 17.7d |
| 440 | 5.87 ± 0.13bc | 12.8 ± 0.4a | 149 ± 12e | 251 ± 25.7c | |
| 660 | 6.83 ± 0.19a | 12.8 ± 0.2a | 212 ± 19de | 349 ± 18b | |
| 880 | 6.66 ± 0.15a | 12.7 ± 0.4a | 150 ± 26e | 452 ± 19.5a | |
| WS | 220 | 5.43 ± 0.18d | 11.577 ± 0.5b | 225 ± 50d | 36 ± 8e |
| 440 | 5.77 ± 0.17bc | 12.180 ± 0.3ab | 434 ± 35c | 40.4 ± 3.3e | |
| 660 | 6.06 ± 0.11b | 12.468 ± 0.1ab | 595 ± 37b | 34.8 ± 3.2e | |
| 880 | 6.55 ± 0.04a | 13.341 ± 0.1a | 706 ± 40a | 32.7 ± 4.6e |
Control, non-amendment control; MS, 4A molecular sieve; and WS, wollastonite. Data are means ± SE (n = 4). Same letters beside the means indicate no significant difference according to Tukey honestly significant difference test (p < 0.05).