[Obj ective]The daily variation law of air temperature,ground temperature,humidity ,total solar radiation,solar transmittance and solar radiation difference of four kinds of greenhouse was studied in different weather,comparing the lowest temperature,ground temperature,humidity,up-and-down temper-ature rate inside and outside the greenhouse in December,January and February.[Method]Using U12-02 temperature-humidity-illuminance recorder to measure room temperature,ground temperature,humidity, radiosity and solar transmittance inside the greenhouse by five plot methods.[Result]The lowest room temperature at night was in the decreasing order of A2,Q1,H2 and H1,the ground temperature of Q1 rose fastest reaching the highest.The sort of the relative humidity from high to low was Q1,A2,H2 and H1. Transmittance of Q1 was the highest.The total radiosity of Q1 appeared earliest,and lasted for the longest time.The heating rate order from the high to low was H2,H1,Q1,A2,and the sort of cooling rate took on the opposite change law.According to the cyclical changes inside and outside the greenhouse,the average daily minimum temperature of A2 was the highest.Average ground temperature of the four greenhouse were all above 12 ℃.The sort of monthly average ground temperature was in decreasing order of Q1,A2, H2 and H1.[Conclusion]The thickness of back earth wall should keep about 178 cm and sunken depth within 50 cm of the greenhouse in Lanzhou area.%【目的】对Q1、A2、H1、H2四种日光温室不同天气下的气温、地温、湿度、太阳总辐射量、太阳辐射透过率、太阳辐射差值的日变化规律进行研究；并对12月、1月、2月日光温室内外最低温度、地温、湿度、升降温速率进行比较．【方法】采用U12-012温湿度光照度记录仪，使用“五点法”测定温室内室温、地温、湿度、辐射度及透光率．【结果】在日光温室室内日变化中，夜间最低室温由高到低排序为A2，Q1，H2，H1；Q1地温升温最快且温度最高；相对湿度由低到高排序是Q1＜A2＜H2＜H1；Q1透光率最高；Q1总辐射度最高值出现时间最早且持续时间最长；升温速率排序为H2＞H1＞Q1＞A2，降温速度排序为H2＜H1＜Q1＜A2．在日光温室周期性变化中，A2温室平均最低温度最高；四类温室平均地温均在12℃以上，月平均地温排序均为Q1＞A2＞H2＞H1．【结论】兰州市日光温室后土墙厚度应该在178 cm左右，下沉深度应控制在50 cm以内．
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