Table 6.
Phosphorus content in whole rice plants grown in aerated solution at high P (200 μm) and then transferred to aerated or stagnant nutrient solution at low (1·6 μm) or high P (200 μm) supply for 1, 2, 4 and 8 d
| Time (day after transition) | Phosphorus content (mg per plant) | ||||
|---|---|---|---|---|---|
| Low P | High P | ||||
| Aerated | Stagnant | Aerated | Stagnant | F-test | |
| Initial | 0·62 ± 0·03 | 0·62 ± 0·03 | 0·62 ± 0·03 | 0·62 ± 0·03 | n.s. |
| 1 | 0·66 ± 0·07 | 0·66 ± 0·06 | 0·66 ± 0·09 | 0·62 ± 0·06 | n.s. |
| 2 | 0·86 ± 0·06 | 0·65 ± 0·05 | 0·81 ± 0·07 | 0·93 ± 0·01 | O × P* |
| 4 | 1·28 ± 0·08 | 0·69 ± 0·10 | 1·10 ± 0·12 | 0·89 ± 0·04 | O × P* |
| 8 | 1·36 ± 0·04 | 0·82 ± 0·11 | 2·16 ± 0·12 | 1·31 ± 0·06 | O* and P* |
Values are means of three replicates ± standard errors. l.s.d. for solution aeration and P interaction effects on phosphorus content in whole plants: 2 d after transition, 0·13; 4 d after transition, 0·28; l.s.d. for solution aeration effects on P content in whole plants at 8 d after transition, 0·19; and for P effects on phosphorus content in whole plants at 8 d after transition, 0·19.
*Significant at P < 0·05, O, P and O × P indicate F-test for solution aeration, P and solution aeration and P interaction effects. n.s., no significant difference.