Table 3.
Impact of exogenously sprayed folic acid in two rates of 100 and 150 mg/L, ascorbic acid in two rates of 100 and 200 mg/L, and salicylic acid in two rates of 100 and 200 mg/L compared with untreated control on the concentration of nutrients and the ratio of K+/Na+ of potato in salt-affected soil over two growing seasons.
| Treatment | Concentration of Nutrients (%) | K+/Na+ Ratio |
||||
|---|---|---|---|---|---|---|
| N | P | K | Na | Cl | ||
| Untreated control | 2.28 ± 0.09 f | 0.370 ± 0.02 e | 2.09 ± 0.11 e | 0.820 ± 0.03 a | 0.745 ± 0.05 a | 2.64 ± 0.10 f |
| Folic acid 100 mg/L | 2.98 ± 0.10 d | 0.405 ± 0.03 b | 3.21 ± 0.12 c | 0.516 ± 0.01 c | 0.446 ± 0.02 c | 6.23 ± 0.21 d |
| Folic acid 150 mg/L | 3.19 ± 0.07 c | 0.411 ± 0.02 b | 3.28 ± 0.13 c | 0.420 ± 0.02 d | 0.353 ± 0.02 d | 7.86 ± 0.32 c |
| Ascorbic acid 100 mg/L | 3.50 ± 0.09 b | 0.421 ± 0.03 a | 3.52 ± 0.15 b | 0.363 ± 0.02 de | 0.293 ± 0.02 de | 9.75 ± 0.33 b |
| Ascorbic acid 200 mg/L | 3.99 ± 0.15 a | 0.427 ± 0.03 a | 3.79 ± 0.11 a | 0.313 ± 0.01 e | 0.243 ± 0.01 e | 12.15 ± 0.41 a |
| Salicylic acid 100 mg/L | 2.38 ± 0.06 f | 0.380 ± 0.01 d | 2.80 ± 0.12 d | 0.668 ± 0.04 b | 0.608 ± 0.04 b | 4.20 ± 0.11 e |
| Salicylic acid 200 mg/L | 2.79 ± 0.07 e | 0.392 ± 0.03 c | 2.88 ± 0.11 d | 0.605 ± 0.04 c | 0.527 ± 0.03 bc | 4.77 ± 0.17 e |
Means followed by different letters differ significantly by LSD (p < 0.05).