Table 1.
Optimization of cob weight under stable environment: parameter ranges and best individual parameter values
| Parameter | Reference value | Variation range (%) | Optimal value |
|---|---|---|---|
| Blade thickness (cm) | 0·028 | ± 5 | 0·027 (min) |
| Blade resistance | 354 | ± 5 | 336·3 (min) |
| Blade sink | 1 | – | 1 |
| Sheath sink | 0·7 | ± 10 | 0·63 (min) |
| Internode sink | 2·17 | ± 10 | 1·95 (min) |
| Cob sink | 202 | ± 30 | 180 |
| Blade sink variation parameter | 0·4 | ± 20 | 0·32 (min) |
| Sheath sink variation parameter | 0·53 | ± 20 | 0·48 |
| Internode sink variation parameter | 0·79 | ± 20 | 0·63 (min) |
| Cob sink variation parameter | 0·62 | ± 30 | 0·7 |
| Number of short internodes at the bottom | 6 | ± 20 | 7 (max) |
| Cycle of ear appearance | 15 | ± 20 | 12 (min) |
| Seed biomass (g) | 0·3 | ± 10 | 0·33 (max) |
| Cob weight (g) | 773 | – | 1221 |
All parameters are dimensionless except blade thickness (cm), seed biomass (g) and cob weight (g). When the optimal value is situated at the interval boundary, it is indicated by ‘min’ (minimal value) or ‘max’ (maximal value). The corresponding cob weight is given from a simulation under the same constant environmental factor.