Table 1.
Addition of N, P, and Mg salts to Hoagland's nutrient solution used in different treatments for the plant growth experiment in a hydroponic system.
| Treatments* | Nutrient concentrations, μmol/L | ||
|---|---|---|---|
| NH4NO3 | KH2PO4 | MgSO4 | |
| HNHP (high N and high P) | 3,000 | 250 | 0 |
| HNHMg (high N and high Mg) | 3,000 | 0 | 1,000 |
| HNLP (high N and low P) | 3,000 | 50 | 0 |
| HNLMg (high N and low Mg) | 3,000 | 0 | 250 |
| LNHP (low N and high P) | 300 | 250 | 0 |
| LNHMg (low N and high Mg) | 300 | 0 | 1,000 |
| LNLP (low N and low P) | 300 | 50 | 0 |
| LNLMg (low N and low Mg) | 300 | 0 | 250 |
*
Hoagland nutrient solution contained the following nutrients: (in mM): Ca(No3)2x4H2O−2.0; KNO3−3.0; K2SO4−0.5; and (in μM) Ca(HPO4)−50; MgCl2−40; Fe-EDTA−12.5; H3BO3−50; FeSO4−25; MnSO4−50; ZnSO4x7H2O−15; CuSO4−0.05; KCl−10; Na2MoO3−0.5; Na2-EDTA−25; CoCl2x6H2O−0.15; and NiSO4x6H2O−0.2 (Hoagland and Arnon, 1950; Liao et al., 2016).