Table 1. AlCl3 concentrations selected for the treatment of barley seedlings grown in DWC hydroponics.
The calculations of available Al3+ concentrations in the full Hoagland’s nutrient solution, pH = 4 were calculated using GEOCHEM-EZ software.
| Concentration | Tested aluminium doses | |||||
|---|---|---|---|---|---|---|
| Nominal {Al3+}* [mM] | 0.125 | 0.25 | 0.5 | 0.75 | 1 | 1.5 |
| Nominal {Al3+}* [ppm] | 3.375 | 6.75 | 13.5 | 20.25 | 27 | 40.5 |
| Available Al3+ [μM] | 5 | 10 | 20 | 30 | 40 | 60 |
| Available Al3+ [ppm] | 0.135 | 0.27 | 0.54 | 0.81 | 1.08 | 1.62 |
{Al3+}*—a nominal dose of applied AlCl3 concentration in a full Hoagland’s nutrient solution