【摘要】 根据黄瓜(Cucumis sativus)发育的光温反应过程,建立了基于生理发育时间的黄瓜生育期模拟模型,并利用不同品种的试验资料对模型进行了检验。结果表明,黄瓜从播种到第一批瓜成熟需积累生理发育时间30 d,播种—幼苗、幼苗—伸蔓、伸蔓—开花、开花—结瓜、结瓜—成熟所需的生理发育时间分别为3、11、9、5、2 d。发芽期、幼苗期、伸蔓期、开花期、结瓜期等各生育期持续时间的模拟值与实际观测值的回归估计标准误差(root mean squared error;RMSE)分别为0、2.6、1.7、0.8、2.1 d,从播种到第一次采收的模拟值与观测值的RMSE为1.4 d。而用有效积温法对发芽期、幼苗期、伸蔓期、开花期、结瓜期等各生育期持续时间的模拟值与实际观测值的RMSE分别为0.7、10.0、5.7、2.4、2.5 d,从播种到第一次采收的模拟值与观测值的RMSE为22.0 d。本模型比用有效积温法能更准确地预测黄瓜各个生育期的起止日期和黄瓜的收获期。更多还原

【Abstract】 A simulation model of development stages of greenhouse cucumber(Cucumis sativus) was developed based on photo-thermal reactions of crop development rate.The concept of physiological development time(PDT) was used as the scale to measure the greenhouse cucumber development stages.Experimental data of different varieties were used to validate the model.The results show that the PDT value for the duration from sowing date to the first harvest date was 30 days,with 3,11,9,5,2 days,respectively,for the duration from sowing to germination,germination to tendril elongation,tendril elongation to flowering,flowering to fruit setting,and fruit setting to first harvest.The root mean squared error(RMSE) between the simulated and observed results for duration of germination,five leaf stage,tendril elongation,flowering,fruit setting,and from sowing to first harvest,respectively,was 0,2.6,1.7,0.8,2.1,1.4 days,which was lower than the prediction errors using the growing degree days(GDD)(0.7,10.0,5.7,2.4,2.5,22.0 days,respectively).更多还原