西北寒冷地区双膜日光温室室内热环境试验研究

Experimental Study on Indoor Thermal Environment of Double-Film Solar Greenhouse in the Cold Region of Northwest China

随着我国农业设施的快速发展,日光温室在西北寒冷地区的应用越来越广泛。作为我国北方地区冬季作物生产的主要农业设施,日光温室热环境对作物生长有着重要的影响。以西北寒冷地区双膜日光温室为研究对象,通过与同区位相同体量的单膜日光温室对比试验分析,研究了双膜日光温室室内热环境的变化规律。结果表明:与单膜日光温室相比,双膜日光温室室内温度高于单膜日光温室,湿度小于单膜日光温室;CO_(2)浓度较单膜日光温室高出14%;土壤温度高于单膜日光温室,相对湿度小于单膜日光温室,浅层土壤温度受外部环境影响波动幅度较单膜日光温室小,双膜日光温室室内热环境更有利于西北寒冷地区作物生长。研究结果对西北地区日光温室室内热环境优化调控、温室设计以及提高作物产量具有重要意义。

With the rapid development of agricultural facilities in China,daylight greenhouses are more and more widely used in the cold regions of Northwest China.As the main agricultural facilities for winter crop production in the northern region of China,the thermal environment of daylight greenhouse has an important impact on crop growth.This paper takes the double film solar greenhouse in the cold area of northwest as the research object,and studies the changes of indoor thermal environment of the double film solar greenhouse through comparative test and analysis with the single film solar greenhouse in the same location and volume.The test results show that:compared with single-film solar greenhouse,double-film solar greenhouse indoor temperature is higher than single-film solar greenhouse and humidity is smaller than single-film solar greenhouse;CO_(2) concentration is 14%higher than single-film solar greenhouse;soil temperature is higher than single-film solar greenhouse;the relative humidity is smaller than single-film solar greenhouse;the shallow soil temperature fluctuations by the influence of the external environment is smaller than the single-film solar greenhouse.Double-film solar greenhouse indoor thermal environment is more favorable to the growth of crops in cold regions of Northwest China.The indoor thermal environment of double-film solar greenhouse is more favorable for the growth of crops in the cold region of Northwest China.The results of the study are of great significance to the optimization and control of the indoor thermal environment of daytime greenhouses in Northwest China,the design of greenhouse and the improvement of crop yield.