Table 3.
Parameters used in Simple Phenology Algorithm (SPA).
| Name | Unit | Abbreviation | Origin of data |
|---|---|---|---|
| Minimum temperature of development | (°C) | T0 | EXP1 |
| Optimal temperature of development | (°C) | Topt | EXP1 |
| Maximum temperature of development | (°C) | Tmax | EXP1 |
| Optimal daylength for maximum development | (h) | Popt | Literature |
| Critical daylength for zero development | (h) | Pcrt | Literature |
| Physiological development days in optimum conditions of temperature and photoperiod | d | PDDoptc,p | Optimization |
| Sensitivity coefficient to the photoperiod | unitless | S | Optimization |
Plant parameters are divided into three types depending on their method of acquisition. Cardinal temperatures (T0, Topt, Tmax) were directly produced in EXP1 at a cultivar level. Popt and Pcrt have been adopted from (Setiyono et al., 2007), based on the cultivar’s MG. PDDoptc,p and sensitivity coefficient to the photoperiod were optimized during the parameterization phase.