后屋面对日光温室温度变化的影响

目的]为摸索后屋面对温室温度变化的影响提供理论依据.方法]以有无后屋面的两种不同结构温室为研究对象,通过对深冬最冷阶段温室内地温、气温数据的变化进行研究比较.结果]1 -1 -18、1-1-19号无后屋面温室气温、地温由于个别因素,前期低于1-1 -13号温室；后期逐渐超过1-1 -13号温室.产生此结果的原因主要与温室结构有很大关系,1 -1 -13号后墙体高2.7m,白天光照受热面积为全部墙体面积,而1 -1 -18、1-1 -19号墙体高度4.2m,在相同温室长度下受热面积为1-1 -13的1.56倍,所以在晴天天气下1 -1 -18、1-1 -19温度回升较快.结论]根据建棚经费对比和温度对比试验分析,无后屋面温室较适应鄯善县山南地区建造,在后期的大规模设施农业发展中能够大大降低建造成本,节约大量资金.

The Influence of Back Roof on Greenhouse Temperature

Objective]The purpose of this project was to explore the impact of the back roof on the greenhouse temperature so that a theoretical basis could be provided.Method]The greenhouses with or without back roofs were taken as the study objects,and the changes of their ground and air temperature data were compared and studied in the coldest phase in deep winter.Result]The results from our experiments showed that the ground and air temperature in 1 - 1 - 18 and 1 -1 - 19 greenhouses that have no back roofs is lower than that in 1 - 1 - 13 greenhouse in the early period and in later period gradually surpasses the 1 - 1- 13th greenhouse.This happens mainly because the temperature is closely related to the greenhouse structure. 1 - 1 - 13 greenhouses back wall is as high as 2.7 m and the daylight heating area is as large as the whole wall area,but 1 -1 -18,1 -1 -19 greenhouses'walls are 4.2 m high.Under the same greenhouse length the heating area is 1.56 times higher than that in the 1 - 1 - 13 greenhouse,therefore in the cloudless day weather,temperature in 1 - 1 - 18,1 - 1 - 19 rises quickly.Conclusion]According to comparative trial analysis of the awning funds and temperature,greenhouses without back roofs adapt well to the area in the south of mountains in Shanshan County.So it follows that greenhouses built in this way can greatly reduce the construction cost greatly in later period's large - scale facility agricultural development,thus saving a large amount of funds.