Table 1 Phosphorus content (mg P) and activity (MBq) in the nutrient solution at the beginning of the labelling period [8 L; 15 days after seeding (DAS)], remaining at the end of the labelling period (7 L; 23 DAS), in the new nutrient solution after the labelling period (8 L; 23 DAS), and at the end of the experiment (7 L; 33 DAS)
Start (15 DAS) | End of labelling (23 DAS) | New nutrient solution (23 DAS) | End of experiment (33 DAS) | |||||
|---|---|---|---|---|---|---|---|---|
33P (MBq) | 31P (mg P) | 33P (MBq) | 31P (mg P) | 33P (MBq) | 31P (mg P) | 33P (MBq) | 31P (mg P) | |
Control | 20 (0.3) | 108 (3) | 11.5 (1.6) | 62 (7) | na | na | na | na |
+ P | 29.4 (1.3) | 104 (4) | 18.0 (1.7) | 51 (6) | 0 | 104a (3) | 0.17 (0.08) | 43 (21) |
− P | 29.5 (0.7) | 104 (3) | 17.5 (1.0) | 54 (2) | 0 | 0a | 0.04 (0.006) | 7 (0.7) |