Table 3.
Effects of salt stress on the leaf N and Na contents in the rapeseed seedlings under different N levels.
| Salt-ion concentration | N rate (g kg−1) | Leaf N content (mg g−1 DW) | Leaf Na content (mg g−1 DW) |
|---|---|---|---|
| S0 | N0 | 31.98 ± 0.52c | 2.18 ± 0.02e |
| N1 | 41.51 ± 0.73b | 1.89 ± 0.05f | |
| N2 | 45.68 ± 0.61a | 1.69 ± 0.03g | |
| N3 | 46.22 ± 0.97a | 1.66 ± 0.04g | |
| S1 | N0 | 32.01 ± 0.56c | 7.33 ± 0.09a |
| N1 | 41.90 ± 0.92b | 5.58 ± 0.10b | |
| N2 | 45.39 ± 0.84a | 4.84 ± 0.08d | |
| N3 | 45.46 ± 0.64a | 5.07 ± 0.06c | |
| ANOVA | |||
| Salt-ion concentration (SC) | ns | ** | |
| N rate (NR) | ** | ** | |
| Salt x N | ns | ** | |
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 levels are indicated by ns and ** for not significant and 0.01, respectively.
DW, dry weight.