日光温室西瓜生育期模拟模型的研究

Research on Simulation Model of Watermelon Growth Period in Solar Greenhouse

以日光温室西瓜对温光条件的生理反应为基础,针对淮安地区日光温室西瓜栽培的实际生产条件,采用生理发育时间(Physiological Development Time,PDT)作为西瓜定量发育进程的尺度,构建了日光温室西瓜生育期的模拟模型,并利用不同播期和不同试验地点的西瓜试验数据对模型进行了检验。结果表明,该模型对西瓜从播种到达发芽期、幼苗期、伸蔓期、开花坐瓜期、果实膨大期、果实成熟期所需生理发育时间的模拟值与实际观测值间的模拟误差均小于3 d,各生育阶段模拟值与观测值的根均方差RMSE分别为1.00、1.58、1.00、1.58、2.24、1.58 d。

A simulation model of development stages of watermelon was developed based on the physiological response to temperature and light condition in solar greenhouse.According to the actual production conditions of watermelon facility cultivation in Huai’an District,the concept of physiological development time(PDT)was used as the scale to quantize watermelon development stages.Experimental datas of different sowing dates and different sowing places watermelon was used to validate the model.The results showed that the simulation error between the simulated and actual observed results from sowing to germination,seeding,tendril elongation,flowering and fruit setting,fruit swelling,fruit maturation,was less than 3 days.The root mean squared error(RMSE)between the simulated and observed results from sowing to each developmental stage of watermelon,respectively,was 1.00,1.58,1.00,1.58,2.24,1.58 days.