| 摘要: |
| 【目的】 建立基于生理发育时间(Physiological development time,PDT)的番茄果实发育期模型，为番茄果实发育期的准确预测提供支持。【方法】 以番茄品种‘金棚1号’为材料，选择3个农家土夯日光温室作为试验设施，将环境温度和光照对番茄果实发育期的影响进行量化，采用正弦三段线性函数建立番茄果实发育期模型，并与基于有效积温建立的发育期模型的模拟效果进行对比。【结果】 模拟结果显示，建立的基于生理发育时间的番茄果实发育期模型能准确预测番茄果实的发育期，番茄第1至第5序果实完成生理期所需的生理发育时间依次分别为25，27，28，25，22 d，其模拟值与观测值分别仅差2，3，1，2，1 d，该模型的预测精度明显高于基于有效积温的发育模型。【结论】 在模拟因子相同的条件下，基于生理发育时间的发育模型较基于有效积温的发育期模型能更准确地预测番茄果实的发育期。 |
| 关键词: 番茄 生理发育时间 有效积温 发育期模型 |
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| 基金项目:国家“十一五”科技支撑计划项目“西部地区优势作物生长数据库和模型的构建”（2007BAD79B01） |
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| Simulation for the fruit developing period of tomato based on physiological development time |
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LU Xingmeng, CHENG Zhihui, LI Wei
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College of Horticulture ,Northwest A&F University
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| Abstract: |
| 【Objective】A simulation model based on physiological development time （PDT） was constructed to accurately forecast fruit developing period of tomato.【Method】The experiment was conducted in three farmers’ earth woody structure solar greenhouses with tomato cv.Jinpeng No.1 as plant material.According to effects of environmental temperature and light on fruit developing period of tomato,a simulation model was constructed with sine three section linear function and was validated.The simulation model based on GDD was introduced as comparison.【Result】The modeling effect shows that the established model can accurately forecast the fruit developing period of tomato and the first to fifth sequence fruit takes 25,27,28,25,22 days,respectively to complete physiological development time according to the simulation,and the difference between the simulated value and the observed value is only 2,3,1,2 and 1 day respectively.The prediction accuracy of this model is significantly higher than that of GDD.【Conclusion】On the conditions of the same simulation factors,the simulation model based on PDT could predict fruit developing period of tomato more accurately compared with that of GDD. |
| Key words: tomato physiological development time effective accumulated temperature development period model |
