| Basic nutrient solution | P addition solution | Major adjustment |
---|---|---|---|
Condition | Â | Â | Â |
   pH | 6.5 | 6.5 | NaOH, H2SO4 |
   Conductivity | 1 mS cm-1 |  | Intermediate renewal |
   Temperature | 27°C |  |  |
   Oxygen | <0.5 or 8 mg l-1 |  |  |
Element | Â | Â | Â |
   Phosphorus | 5 or 500 μg l-1 | 50 mg l-1 | KH2PO4 |
   Nitrogen | 2.4 mg l-1 |  | (NH4)2SO4 |
   Potassium | 3.4 mg l-1 | 802 mg l-1 | K2SO4, KH2SO4 |
   Calcium | 130 mg l-1 | 291 mg l-1 | CaSO4, CaCl2 |
   Sulphur | 98 mg l-1 | 690 mg l-1 | (NH4)2SO4, CaSO4, MgSO4 |
   Magnesium | 41 mg l-1 | 114 mg l-1 | MgSO4 |
   Sodium | 50 mg l-1 | 12 mg l-1 | NaCl |
   Chloride | 216 mg l-1 | 18 mg l-1 | NaCl, CaCl2 |
   Silicium | 351 mg l-1 |  | Na2SiO3 |
   Boron | 27 μg l-1 | 5.4 mg l-1 | H3BO3 |
   Manganese | 11 μg l-1 | 2.2 mg l-1 | MnSO4 |
   Zinc | 13 μg l-1 | 2.6 mg l-1 | ZnSO4 |
   Copper | 13 μg l-1 | 2.6 mg l-1 | CuSO4 |
   Molybdenum | 4.8 μg l-1 | 1.0 mg l-1 | Na2MoO4 |
   Iron | 112 μg l-1 |  | FeSO4 |