基于PDT的温室茄子发育模拟模型

A Simulation Model for Eggplant Growth and Development in Solar Greenhouse Based on Physiological Development Time(PDT)

本研究将温度对茄子发育速率影响效应的大小用相对热效应(RTE)来衡量,通过研究Beta函数的性质提出基于幂函数的模型来描述RTE与温度之间的关系。采用生理发育时间(Physiological Development'Time,PDT)作为定量发育进程的尺度,建立了温室茄子发育模拟模型。利用模型对日光温室2年3茬茄子生长发育期资料进行检验的结果表明:模型能较好地预测各个发育期(发芽、苗期、开花坐果、结果和采收期)的出现时间和持续时间,各生育期模拟值与观测值的回归估计标准误差(RMSE)分别为1.00、1.73、0.82、1.41、2.38 d,显著优于基于有效积温模拟模型的预测精度(其生育期模拟的RMSE分别为2.38、7.14、1.73、5.07、8.25 d)。

The daily relative thermal effectiveness（RTE） was taken as an indicator to assess the impact of temperature on the development rate of eggplant.The model based on the power function was established to describe the relationship of RTE with temperature through studying the characters of Beta function.Based on the physiological development time（PDT）,the simulation model for eggplant growth and development in the greenhouse was established and validated by the experiments in the greenhouse from 2007 to 2009.The results showed that the model could predict the time and duration of different growing periods,such as germination,seedling,flowering and fruit setting,fruit ripening and harvest.The standard error of regression estimate analysis（RMSE） between simulated and observed values was 1.00,1.73,0.82,1.41 and 2.38 days for the germination,seedling,flowering and fruit setting,fruit ripening and harvest period respectively.The prediction accuracy by this model was higher than that by simulation model based on efficiency accumulate temperature（EAT）,whose RMSE was 2.38,7.14,1.73,5.07 and 8.25 days respectively.