EarlyGrainFilling

The EarlyGrainFilling phase in Canola represents the developmental period from StartGrainFilling to EndFlowering. It is influenced by thermal time only.

Overview

The GenericPhase model simulates the time between the EndPodDevelopment and EndGrainFill stages.

• This phase starts at StartGrainFilling and ends at EndFlowering, when the grain is considered to be fully ripe.
• The model uses daily Thermal Time, retrieved from the [Phenology].ThermalTime function.
• The Target thermal time is assumed as follows:

The model assumes the entire grain filling period is a constant value defined as genotypic parameter [Phenology].LateGrainFilling.Target.EntireGrainfillPeriod.FixedValue (\(T_\text{total}\)) and the default value is 700 °Cd, and divides this into three phases:

• Early Grain Filling = 5% of the total period \[ T_\text{early} = 0.05 \times T_\text{total} \]

• Mid Grain Filling = 50% of the remaining period after early grain fill

\[ T_\text{mid} = 0.5 \times (T_\text{total} - T_\text{early}) \]

• Late Grain Filling = Residual period

\[ T_\text{late} = T_\text{total} - T_\text{early} - T_\text{mid} \]

A variable Stress referring to [Phenology].Vegetative.PhotoperiodEffect is presented in the Canola model, but don’t actually use in the model.

Cultivar-Specific Parameters

Name	Description	Default Value
[Phenology].LateGrainFilling.Target.EntireGrainfillPeriod.FixedValue	Thermal time target during whole grain filling (°Cd)	700

Practical Example

no practical example available