| A wide range of environmental factors affects plant growth. Here, 12 of the most important factors are considered. |
|
To analyse the effect of these factors on plant growth in terms of dose-response curves, we need first to define what
the relevant range is where actively-growing plants normally have to cope with. These ranges are listed below,
as well as the value that serves as reference value in the construction of the dose-response curves.
|
| Environmental Factor | Range considered | Unit | Reference value |
| 1. Irradiance | 1 - 50 | mol m-2 day-1 | 8 |
| 2. R:FR | 0.2 - 1.2 | mol mol-1 | 0.9 |
| 3. UV-B | 1 - 20 | kJ m-2 day-1 | 7 |
| 4. CO2 | 200 - 1200 | µmol mol-1 | 400 |
| 5. O3 | 5 - 100 | nmol mol-1 | 20 |
| 6. Nutrients | 0.02 - 1 | rel. Units | 1 |
| 7. Drought | 0.05 - 1 | rel. Units | 1 |
| 8. Waterlogging | absent / present | - | absent |
| 9. Submergence | absent / present | - | absent |
| 10. Temperature | 5 - 35 | °C | 20 |
| 11. Salinity | 0 - 1 | fraction of seawater | 0.1 |
| 12. Soil Compaction | 1.0 - 1.6 | g cm-3 | 1.2 |