Table 5 Irrigation water composition used in the experiment. The micro elements of half strength Hoagland solution (in μmol L−1: 40 Fe-EDTA, 25 H3BO3, 2.0 MnCl2 × 4H2O, 2.0 ZnSO4 × 7H2O, 0.5 CuSO4 × 5H2O, 50 KCl, 0.075 (NH4)6Mo7O24 × 4H2O, 0.15 CoCl2 × 6H2O) in irrigation water were not shown in table