Vegetative
The Vegetative phase in Canola represents the developmental period from Emergence to FloralInitiation. It is influenced by thermal time only.
Overview
The GenericPhase model simulates the time between the StartEmergence and StartFloralInitiation stages.
- This phase starts at StartEmergence and ends at StartFloralInitiation, when the plant is considered to be fully developed.
- The model uses daily Thermal Time, retrieved from the
[Phenology].ThermalTimefunction. - The Target thermal time is depending on vernalisation time from germination to floral initiation (\(VT\)) (Whish et al. 2020).
This response curve is defined by XYPairs with following values:
| Cumulative Vernal Time (days) | Target Thermal Time (°Cd) |
|---|---|
| 0.0 | 290.0 |
| 25.0 | 1.0 |
In each day, the model checks whether the cumulative thermal time has reached the target thermal time. If it has, the phase is considered complete, and the model transitions to the next phase, which is FloralInitiation.
The cumulative thermal time is calculated as the sum of daily vernalisation time from germination to floral initiation.
The daily vernalisation time is calculated with SubDailyInterpolation using the following response function to air temperature after ThreeHourAirTemperature interpolation method:
| Temperature (°C) | Response (°Cd) |
|---|---|
| 0 | 0 |
| 2 | 1 |
| 8 | 0.5 |
| 15 | 0 |
Cultivar-Specific Parameters
| Name | Description | Default Value |
|---|---|---|
| [Phenology].Vegetative.Target.XYPairs.X | Vernal time X values for target thermal time (days) | 0, 25 |
| [Phenology].Vegetative.Target.XYPairs.Y | Target thermal time Y values (°Cd) | 290, 1 |
Practical Example
no practical example available
References
Whish, J. P. M., J. M. Lilley, M. J. Morrison, B. Cocks, and M. Bullock. 2020. “Vernalisation in Australian Spring Canola Explains Variable Flowering Responses.” Field Crops Research 258 (November): 107968. https://doi.org/10.1016/j.fcr.2020.107968.