Accumulate growing degree days (GDD) to predict crop development stages and phenology, supporting field-timing management and maturity-group selection.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Daily GDD | GDD = (Tmax+Tmin)/2 − Tbase | McMaster & Wilhelm 1997 |
| Base temperature | Crops use species-specific Tbase | FAO Ecocrop |
| Accumulated GDD | GDDcum = Σ GDDi | Wang 1960 |
️ 植物生长度日(GDD)计算器。农业种植工具,帮助计算种植参数与产量。