Table 1.
Statistical summary of plant growth and leaf gas exchange in four wheat cultivars (Wyalkatchem, Cranbrook, Gutha, and Gamenya) treated with two K levels (40, 100 mg K/kg) and five Na levels (0, 25, 50, 100, 200 mg Na/kg) for 8 weeks.
| Parameters | Soil K | Soil Na | Cultivar | K × Na | K × cv. | Na × cv. | K × Na × cv. |
|---|---|---|---|---|---|---|---|
| Shoot dry weight | *** | *** | * | ** | *** | *** | * |
| Tiller number | *** | *** | *** | * | *** | *** | ** |
| Root dry weight | *** | *** | *** | P= 0.06 | * | *** | n.s |
| Root: shoot ratio | ** | *** | *** | n.s | * | *** | n.s |
| Photosynthesis | *** | *** | *** | *** | n.s | * | *** |
| Stomatal conductance | *** | *** | ** | * | n.s | n.s | * |
*P≤ 0.05; **P≤ 0.01; ***P≤ 0.001; n.s., not significant.