山东寿光冬季日光温室内温度变化特征及低温预报(英文)

目的]为了提高设施农业气象服务水平,减轻气象灾害对日光温室蔬菜生产的影响。方法]利用2008~2011年冬季日光温室内外气象观测资料,采用相关及逐步回归分析方法,对冬季日光温室内温度变化特征及最低气温预报模型进行分析研究。结果]晴天和多云天气下日光温室内的气温有明显的日变化,且晴天状况下温度变化幅度要大于多云天气;连阴天时日光温室内气温较低,严重影响植物正常生长发育。日光温室内最低气温与温室外气温及温室内湿度、气温、地温相关性较好。结论]试验建立了日光温室内最低气温预报模型,利用最新资料对模型进行预报检验,不同天气状况下日光温室内最低气温预报值平均绝对误差小于1℃,平均相对误差低于10%。

Characters of Temperature Variation and Minimal Temperature Forecast inside of Solar Greenhouse in Winter in Shouguang City of Shandong Province

Objective] The aim was to improve meteorological service of protected agriculture and to reduce effects of meteorological disasters.Method] Characters of temperature variation in solar greenhouse and minimal temperature forecast models in winter were analyzed based on meteorological data inside and outside of solar greenhouse in winter during 2008-2011,as per correlation and stepwise regression method.Result] Temperature was of significant changes in solar greenhouse in sunny and cloudy days and the change was higher in sunny days.In overcast days,temperature in solar greenhouse was lower and plants were affected seriously.In addition,the minimal temperature was of good correlation with outside temperature and humidity,temperature and soil temperature in greenhouse.Conclusion] The minimal temperature forecast model of solar greenhouse is established and the average absolute error of the forecasted minimums in different types of weather was less than 1 ℃ and the average relative error was lower than 10%.