Phenology
The Phenology model in APSIM NG simulates the development of lentil plants.
Thermal Time
Daily Thermal Time is calculated using a three cardinal temperature response curve with different parameters for pre-emergence and post-emergence phases.
Photoperiod
The daily photoperiod is calculated using the PhotoperiodFunction with -6 degrees twilight. See Photoperiod for more details.
Stages and Phases
The numerical system is used to represent the development of lentil plants starting from 1. The stages are:
| Stage | Name | Description |
|---|---|---|
| 1 | Sowing | Seeds are planted in the soil |
| 2 | Germination | Seeds absorb water and begin to sprout |
| 3 | Emergence | Seedlings break through the soil surface |
| 4 | FloralInitiation | Plant initiates floral meristems |
| 5 | FirstBudsVisiable | First buds become visible |
| 6 | FirstFlowersSet | First flowers set and bloom |
| 7 | FirstPodsVisiable | First pods become visible |
| 8 | FirstGrainsVisiable | First grains become visible in pods |
| 9 | TerminalNode | Main stem reaches terminal node |
| 10 | LastPodsDeveloped | Final pods have developed |
| 11 | LastGrainsFilled | Final grain filling is complete |
| 12 | HarvestRipe | Grains are fully ripened and ready for harvest |
Phases are used to represent the development between two stages. The phases are:
| Order | Name | From | To |
|---|---|---|---|
| 1 | Germinating | Sowing | Germination |
| 2 | Emerging | Germination | Emergence |
| 3 | Juvenile | Emergence | FloralInitiation |
| 4 | Inductive | FloralInitiation | FirstBudsVisiable |
| 5 | FirstFlowersDeveloping | FirstBudsVisiable | FirstFlowersSet |
| 6 | FirstPodsDeveloping | FirstFlowersSet | FirstPodsVisiable |
| 7 | FirstGrainsDeveloping | FirstPodsVisiable | FirstGrainsVisiable |
| 8 | FirstGrainsFilling | FirstGrainsVisiable | TerminalNode |
| 9 | FinalPodsDeveloping | TerminalNode | LastPodsDeveloped |
| 10 | FinalGrainsFilling | LastPodsDeveloped | LastGrainsFilled |
| 11 | Ripening | LastGrainsFilled | HarvestRipe |
| 12 | ReadyForHarvesting | HarvestRipe | Unused |