Table 2.
Effects of salt stress on the osmotic substances in the rapeseed seedlings under different N levels.
| Salt | N rate (g kg−1) | Soluble protein (mg g−1 FW) | Soluble sugar (mg g−1 FW) | Proline (ng g−1 FW) |
|---|---|---|---|---|
| S0 | N0 | 5.37 ± 0.20f | 96.33 ± 2.97d | 182.26 ± 5.46f |
| N1 | 5.42 ± 0.14f | 96.67 ± 2.25d | 196.42 ± 8.37e | |
| N2 | 7.54 ± 0.12e | 104.50 ± 2.69b | 232.14 ± 6.71d | |
| N3 | 7.80 ± 0.15d | 100.57 ± 3.02c | 258.48 ± 5.37c | |
| S1 | N0 | 7.82 ± 0.08d | 96.64 ± 2.38d | 252.28 ± 6.13c |
| N1 | 8.12 ± 0.18c | 102.12 ± 3.06bc | 270.18 ± 8.19b | |
| N2 | 8.80 ± 0.17a | 117.22 ± 3.25a | 312.99 ± 7.51a | |
| N3 | 8.55 ± 0.23b | 114.64 ± 2.77a | 308.62 ± 6.78a | |
| ANOVA | ||||
| salt | ** | ** | ** | |
| N | ** | ** | ** | |
| Salt x N | ** | ** | ** | |
Data are mean ± SE (n = 6). S0 and S1 respectively represent salinity levels of 0 and 3 g NaCl kg−1 soil. N0, N1, N2, and N3 respectively represent N rate levels of 0, 0.1, 0.2, and 0.3 g N kg−1 soil. Different letters within a column indicate significant differences at p = 0.05. Probability level is indicated by ** for 0.01.
FW, fresh weight.