TABLE 3.
Effects of different salt concentrations and nitrogen rates on rice root morphological traits.
| Treatment | Root dry weight (g pot–1) |
Root length (m pot–1) |
Root surface area (cm2 pot–1) |
|||||||||
| TR | BT | HD | FR | TR | BT | HD | FR | TR | BT | HD | FR | |
| S0N1 | 4.18a | 7.03b | 11.2c | 8.82c | 216.6a | 380.4b | 583.2b | 489.5b | 5621.7b | 7625.7b | 8215.7c | 7215.5c |
| S0N2 | 4.26a | 7.32a | 12.45a | 10.68a | 218.0a | 426.5a | 630.3a | 521.7a | 5783.5a | 8023.1a | 9818.0a | 9053.7a |
| S0N3 | 4.35a | 7.25a | 11.73b | 9.54b | 219.4a | 435.4a | 645.2a | 518.7a | 5864.2a | 8267.5a | 8925.7b | 8215.7b |
| S1N1 | 2.84b | 5.84d | 8.95f | 7.32d | 163.4b | 301.2d | 501.2c | 426.3c | 4012.8d | 5625.0d | 6821.3f | 5872.6f |
| S1N2 | 2.90b | 6.25c | 10.42d | 9.46b | 166.9b | 356.0c | 569.7b | 496.7b | 4534.7c | 6028.2c | 8607.8d | 6928.4d |
| S1N3 | 2.96b | 6.23c | 9.84e | 8.77c | 166.2b | 360.2c | 572.4b | 489.2b | 4428.9c | 6204.7c | 7658.2e | 6502.5e |
| S2N1 | 1.33c | 4.20f | 6.22i | 5.03g | 86.2d | 174.2f | 258.5f | 204.3f | 2729.6f | 4218.6f | 4922.7i | 4463.2i |
| S2N2 | 1.42c | 5.18e | 7.02g | 6.61e | 92.4c | 210.4e | 325.7d | 266.8d | 3028.1e | 5219.8e | 6032.6g | 5469.3g |
| S2N3 | 1.44c | 5.24e | 6.88h | 5.69f | 90.3c | 198.6e | 291.1e | 252.4e | 3000.5e | 5005.6e | 5301.5h | 5008.0h |
S0, S1, and S2 indicate 0, 1.5, and 3.0 g kg–1 NaCl, respectively. N1, N2, and N3 indicate 210, 300, and 390 kg ha–1 nitrogen rate, respectively. TR, BT, HD, and FR indicate tillering, booting, heading, and full-ripening stage, respectively.
The values in the same column followed by different letters indicate statistical significance at the 0.05 probability level.