Provide crop and irrigation advisories from temperature, rainfall and soil data.
农业气象建议基于作物积温:生育进度=累积 GDD÷该作物所需 GDD 上限×100,划分播种-出苗/苗期-分蘖/拔节-抽穗/灌浆-结铃/成熟等生育期;播种适宜性按气温 T 与作物播种温区[sowT]、最适温区[optT]判定;降水量 P<10mm 提示灌溉缺水,依生育期与降水给出收割与防涝建议。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Growing degree days | GDD = Σ(Tmean − Tbase) | FAO-56 |
| Active accumulated temp | ≥10 °C active accumulated temp | Agri-meteorology spec |
| Frost criteria | ≤0 °C surface = frost | QX/T disaster spec |
| Drought index | SPI at 3/6/12-month scale | McKee 1993 |
| Irrigation trigger | <60% field capacity triggers | FAO-56 §8 |
| Sowing window | 5 cm soil ≥10 °C stable | Agri observation spec |
输入温度、降水和有效积温,结合玉米、水稻、小麦、棉花等作物的生育期积温需求,计算生育进度,给出播种适宜性、收割时机和灌溉排水等农事建议。