日光温室土壤温度变化特征和预报模型研究

目的]研究日光温室内土壤温度变化规律及其预报模型。方法]利用徐州地区标准日光温室内外气温和温室内多层次土壤温度观测资料,分析了温室内各层土壤温度的年变化和日变化,并对温室内土壤温度的预报模型进行了模拟和检验。结果]温室内土壤温度年变化和日变化均呈单峰曲线,下层温度变化振幅小于上层。温室内各层土壤温度（最高值、最低值和平均值）与当日温室外同类型气温的相关性最为密切。以当日和前一日温室外日平均气温、日最高气温、日最低气温为预报因子,建立了温室内同类型不同层次土壤温度预报模型。温室内各层日平均温度的模拟效果优于对应层的最高温度的模拟效果,劣于对应层日最低温度的模拟效果;下层土壤日最高温度和日平均温度的模拟效果优于上层;实测土壤温度在15～30℃模拟效果较好,其他温度段模拟值较实测值偏低。结论]该研究为日光温室内植物的生长发育环境提供理论依据。

Analysis of Variation Characters and Prediction Model of Soil Temperature in Solar Greenhouse

Objective] The aim was to study the soil temperature changes and its forecast model in greenhouse by solar heat.Method] Annual and daily variation characters of soil temperature were analyzed in this paper by using the observation data of air temperature out of solar greenhouse and different layers soil temperature in it.The soil temperature(daily maximum,daily minimum and daily mean) forecasting models were also studied.Simulation and test were conducted to the forecast model of soil temperature in the g...