Table 1.
Macronutrient composition of the solutions with low or high concentration of nutrients combined with different N-forms (in mm)
| Treatment |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Composition |
Low  |
Low  |
Low NH4NO3 |
High  |
High  |
High NH4NO3 |
|||||
| KH2PO4 | 0·5 | 0·5 | 0·5 | 1 | 1 | 1 | |||||
| KNO3 | 2 | 5 | |||||||||
| NH4NO3 | 1 | 7·5 | |||||||||
| (NH4)2SO4 | 1 | 7·5 | |||||||||
| Ca(NO3)2 | 5 | ||||||||||
| CaCl2 | 2·0 | 2·0 | 2·0 | 5 | 5 | ||||||
| MgSO4 | 1·2 | 1·2 | 1·2 | 2 | 2 | 2 | |||||
| K2SO4 | 1 | 1 | 2·5 | 2·5 | |||||||
In addition, the media with low concentration of nutrients contained the same micronutrient as mentioned in the section ‘Plant cultivation’. The high concentration of nutrients contained the following micronutrients (mm): H3BO3 4·6 × 10−2, ZnSO4.7H2O 7·6 × 10−4, CuSO4.5H2O 3·2 × 10−4, (NH4)6MoO24 1·6 × 10−5, MnCl2.4H2O 9·0 × 10−3, FeEDTA 3·7 × 10−2.