寡日照天气对设施番茄生长影响模拟研究

Research on modeling the effect of weak solar radiation on protected tomato growth

为了定量化表征寡日照天气对设施番茄生长的影响,本研究基于EPIC模型(erosion-productivity impact calculator)的作物生长模块,构建了寡日照条件下设施番茄生长模型。考虑低温的影响,对株高的模拟方法进行了改进。利用4个不同播期秋冬茬番茄栽培试验数据对构建模型进行参数率定和检验。结果表明,该模型可以模拟寡日照天气条件下设施番茄株高、地上部生物量和叶面积指数的变化,模拟值与实测值的相对误差分别控制在16%、10%和16%以内。根据2012-2015年11月份的温室气象数据设定不同的情形,模拟设施番茄的生长状况。结果表明,寡日照天气对设施番茄地上部生物量增加的影响要大于对叶面积指数和株高的影响。该模型可用于定量描述寡日照天气对设施番茄生长过程的影响,可为制定设施番茄合理的环境调控策略提供指导。

In order to characterize the influence of weak solar radiation on tomato growth,the tomato growth model was established based on the crop growth module in EPIC model(erosion-productivity impact calculator).Simulating tomato height growth was improved by considering the low temperature stress.The established model was calibrated and verified using the data collected from an autumn-winter season tomato experiment with four different planting periods.The results showed that the tomato plant height,aboveground biomass accumulation and leaf area index could be simulated using the calibrated model with relative errors within 16%,10%and 16%between the simulated and measured values respectively.Different situations were set based on the weather data in November from 2012 to 2015 to simulate tomato growth.The results showed that the effect of weak solar radiation on tomato aboveground biomass accumulation was more than that on plant height and leaf area index increase.It indicated that the established model could be used to characterize the influence of weak solar sunshine on growth of protected tomato,which is important on making reasonable schedule of artificial lighting.