| Simulation of the development of apple in Tianshui |
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| DOI：10.7606/j.issn.1000-7601.2010.01.43 |
| Key Words: Tianshui apple physiological development time simulation model |
| Author Name | Affiliation | | HU Liping | Tianshui Meteorological Bureau, Tianshui, Gansu 741018, China；
Agrometeorological Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | PEI Gue | Meteorological Bureau of Wushan, Wushan, Gansu 741300, China | | YAO Yanfeng | Tianshui Meteorological Bureau, Tianshui, Gansu 741018, China | | AN Jing | Tianshui Meteorological Bureau, Tianshui, Gansu 741018, China | | LIU Xiaoqiang | Tianshui Meteorological Bureau, Tianshui, Gansu 741018, China |
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| Abstract: |
| Using experimental data in Maiji area of Tianshui in the valley of Weihe River，a simulation model for apple development was developed based on the concept of physiological development time (PDT) and the photo-thermal reactions of apple in Tianshui. The model was validated by independent experimental data from Qin'an of the north of Wei River and Qingshui of the area of Guanshan Mountains. The results showed that the model could predict better the time of emergence and the sustained number of days of various developmental stages simulated results agreed well with the measured ones. The absolute forecast error of the model is typically less than 7 days in the various development stages of apple, the root mean squared error(RMSE) of simulated and observed values is respectively 2.4, 0.9, 2.7, 4.0, 4.0 days when apple reaches leaf bud open, unfolds leaf peak, flowering peak, fruit mature period and leaf starts to change color development period, the forecast error of sustained the number of days in various development stages is respectively 2.4, 2.0, 2.3, 4.0, 3.4 days. |
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