Maturing
The Maturing phase in Chickpea represents the developmental period from EndGrainFill to Maturity. This phase covers the period after grain filling is complete when seeds undergo physiological maturation and begin to dry down.
Overview
The GenericPhase model simulates the time between EndGrainFill and Maturity stages.
- This phase starts at EndGrainFill and ends at Maturity
- The model uses daily Thermal Time, retrieved from the
[Phenology].ThermalTimefunction - The Target thermal time is cultivar-specific (Robertson et al. 2002).
Physiological Maturity
During the maturing phase:
- Seeds have reached maximum dry weight
- Seed moisture content continues to decline
- Seeds transition to a quiescent state
- Chlorophyll degrades in pods and remaining plant parts
- The plant senesces completely
Seed Changes
At physiological maturity:
- Maximum dry weight: Seeds have accumulated their full complement of reserves
- Viability established: Seeds acquire the ability to germinate
- Moisture loss: Seed moisture decreases toward harvest moisture levels
- Pod color change: Pods transition from green to brown or tan
- Seed coat hardens: Seeds become more resistant to mechanical damage
Cultivar-Specific Parameters
| Name | Description | Default Value |
|---|---|---|
| [Phenology].Maturing.Target | Thermal time for seed maturation (°Cd) | 60 |
References
Robertson, M. J., P. S. Carberry, N. I. Huth, J. E. Turpin, M. E. Probert, P. L. Poulton, M. Bell, G. C. Wright, S. J. Yeates, and R. B. Brinsmead. 2002. “Simulation of Growth and Development of Diverse Legume Species in APSIM.” Australian Journal of Agricultural Research 53 (4): 429–46. https://doi.org/10.1071/AR01106.