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《Research of Agricultural Modernization》 2006-04
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Effect of Inside Thermal Screen on Microclimate Changing and Energy Saving in Sunlight Greenhouse

ZHANG Ya-hong,DU Jian-min,LI Jian-she(School of Agriculture,Ningxia University,Yinchuan,Ningxia 750021,China)  
In order to reduce energy loss from south roof during nighttimes,the thermal screen was designed in sunlight greenhouse.The results showed:①The thermal screen effect on increasing temperature in clear day is better than that of in cloudy day.Using thermal screen is significant for air temperature,but not for soil temperature.In clear days,the average air temperature is 1.5℃ higher,the temperature above thermal screen is 1.6℃ lower and the average temperature on soil surface is 0.4℃ higher than those in contrast greenhouse.② The humidity decrease of having thermal screen in clear days exceeds that in cloudy days.In clear days,the average relative humidity and absolute humidity are 3.7% and 1.48hPa lower than those in contrast greenhouse respectively.In cloudy days,the average relative humidity is 2.9% lower and it has no significance for absolute humidity decrease.③It has some effect on energy saving to use thermal screen,the energy saving ration of thermal screen is 6% in clear day,and 4% in cloudy day.
【Fund】: 宁夏“8613”重点课题“温室名特优蔬菜引进及无公害生产配套技术示范”(2002);; 宁夏大学自然科学基金“日光温室内设保温幕的小气候效应及节能效果研究”(2004)
【CateGory Index】: S625
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