Table 5. Effects of Si and SAR on mineral element concentrations in the roots of rice seedlings.
| SAR (pH) | Si (mM) | Macroelements | Microelements | Si μg·g-1(DW) | ||||
|---|---|---|---|---|---|---|---|---|
| K mg·g-1(DW) | Ca mg·g-1(DW) | Mg mg·g-1(DW) | Cu μg·g-1(DW) | Zn μg·g-1 (DW) | Fe μg·g-1(DW) | |||
| 6.5 | 0 | 5.835±0.074 i | 2.973±0.018 c | 2.696±0.011 b | 38.900±0.400 g | 28.067±0.289 j | 542.900±4.004 f | 81.167±0.115 h |
| 1 | 4.100±0.061 l | 1.486±0.004 j | 2.437±0.006 e | 22.533±0.289 m | 32.000±0.001 h | 526.233±12.057 g | 92.833±1.801 g | |
| 2 | 6.017±0.050 hi | 1.950±0.011 ghi | 2.352±0.007 f | 35.033±0.404 i | 30.633±0.231 I | 454.033±7.565 h | 107.167±4.050 f | |
| 4 | 1.918±0.046 m | 3.169±0.044 b | 2.131±0.017 h | 26.267±0.231 l | 25.433±0.231 l | 271.177±2.203 l | 90.700±3.923 g | |
| 4.0 | 0 | 4.343±0.088 k | 4.223±0.043 a | 2.147±0.013 h | 31.133±0.611 j | 46.167±0.289 c | 596.633±1.904 e | 115.767±2.761 e |
| 1 | 8.873±0.337 e | 4.252±0.045 a | 2.582±0.016 c | 36.333±0.666 h | 23.667±0.231 n | 642.477±8.851 d | 187.967±1.986 b | |
| 2 | 9.829±0.101 d | 4.261±0.005 a | 2.490±0.045 d | 25.767±0.462 l | 18.500±0.001 p | 542.400±1.100 f | 195.600±4.139 a | |
| 4 | 1.647±0.015 n | 3.189±0.003 b | 2.282±0.005 g | 29.200±0.001 k | 19.833±0.231 o | 285.777±1.124 k | 121.433±4.051 e | |
| 3.0 | 0 | 8.093±0.077 f | 1.978±0.017 gh | 2.070±0.005 i | 26.033±0.577 l | 27.300±0.001 k | 766.733±4.302 a | 65.333±0.289 j |
| 1 | 14.859±0.132 b | 1.505±0.018 j | 2.300±0.015 g | 69.500±0.656 d | 49.767±0.231 a | 717.277±6.568 b | 104.733±0.289 f | |
| 2 | 16.775±0.108 a | 1.471±0.006 j | 2.911±0.041 a | 38.933±0.513 g | 35.100±0.721 e | 653.700±5.730 c | 150.533±6.902 c | |
| 4 | 10.936±0.070 c | 1.924±0.028 i | 2.440±0.019 e | 66.700±0.557 e | 32.933±0.231 g | 534.333±1.365 fg | 125.933±5.085 d | |
| 2.0 | 0 | 4.191±0.037 kl | 1.985±0.010 g | 1.361±0.015 l | 87.200±0.346 a | 39.100±0.001 d | 412.500±14.728 j | 48.200±1.905 l |
| 1 | 5.163±0.061 j | 2.601±0.052 d | 2.018±0.003 j | 72.867±0.462 c | 33.833±0.231 f | 434.103±2.771 i | 57.667±1.518 k | |
| 2 | 6.136±0.081 h | 2.403±0.006 f | 2.309±0.015 g | 40.900±0.557 f | 46.733±0.231 b | 457.033±5.950 h | 78.800±5.615 hi | |
| 4 | 7.634±0.116 g | 2.534±0.012 e | 1.970±0.009 k | 85.100±0.400 b | 24.667±0.231 m | 404.733±2.312 j | 74.333±1.266 i | |
| F | 25.232 | 26.209 | 11.234 | 15.715 | 4.157 | 42.397 | 38.997 | |
| p | 0.000* | 0.000* | 0.000* | 0.000* | 0.000* | 0.000* | 0.000* | |
The values are the means ± standard deviation, n = 3.
Significant differences (p<0.05) are indicated by different letters in the same column.
* Significant at the 0.05 level.