Table 1.
Effect of wollastonite skarn on soybean and lettuce growth.
| Soybean | Control | Wollastonite amended soil (WAS) | p-value |
|---|---|---|---|
| Plant height (cm) | 59.10 ± 6.01 | 62.10 ± 6.43 | 0.2953 |
| Leaf area (cm2) | 47.43 ± 5.54 | 58.13 ± 9.29 | 0.0058 |
| Stem width (cm) | 5.80 ± 0.75 | 7.90 ± 1.70 | 0.0022 |
| Number of bean pods per plant | 12.20 ± 2.18 | 17.10 ± 4.50 | 0.0062 |
| Mean mass (g) of bean pod | 0.698 ± 0.20 | 0.704 ± 0.21 | 0.9486 |
| Total mass (g) of bean pods (yield) | 85.2 | 120.3 | – |
| Silicon in leaf (wt.%) | 0.34 ± 0.13 | 0.75 ± 0.14 | 0.0001 |
| Silicon in stem (wt.%) | 0.02 ± 0.01 | 0.04 ± 0.01 | 0.0003 |
| Silicon in bean pods (wt.%) | 0.04 ± 0.01 | 0.10 ± 0.02 | 0.0001 |
| Silicon in root (wt.%) | BDL* | 0.09 ± 0.05 | 0.0001 |
| Lettuce | Control | Wollastonite amended soil (WAS) | p -value |
| Plant height (cm) | 37.00 ± 2.10 | 41.4 ± 1.96 | 0.0001 |
| Leaf area (cm2) | 167.44 ± 30.28 | 224.00 ± 18.00 | 0.0001 |
| Leaf moisture (%) | 92.68 ± 0.75 | 92.83 ± 0.90 | 0.6903 |
| Silicon in leaf (wt.%) | BDL* | 0.07 ± 0.02 | 0.0001 |
Paired t-test (n = 10) yielded the p-values (p < 0.05 is significant).
*
Below AAS detection limit (0.01 wt.%).