Comparative Analysis on Environment in a Solar Greenhouse and Plastic Greenhouse in Ningxia

Taking solar greenhouse and plastic greenhouse in Ningxia as research object,air temperature and humidity,soil temperature at depth of 15cm in two greenhouses were comparatively analyzed,in order to promote the development of facility agriculture.The results showed that,in terms of indoor air temperature,the temperature in a solar greenhouse was higher than the plastic greenhouse.On sunny days,the average temperature in a solar greenhouse during a day was 2.3℃ higher than in the plastic greenhouse,but the difference was not so obvious on sunny days.On cloudy days,the average temperature in a solar greenhouse during a day was 2.2℃ higher than in the plastic greenhouse,the difference was so obvious on cloudy days.The condition was the same according to the changes of the seasons.In terms of indoor soil temperature,the soil temperature in a solar greenhouse was higher than the plastic greenhouse.On sunny days,the average soil temperature in a solar greenhouse during a day was 1.2℃ higher than in the plastic greenhouse,the difference was so obvious on sunny days.On cloudy days,the average soil temperature in a solar greenhouse during a day was 2.6℃higher than in the plastic greenhouse,the difference was so obvious too.In terms of indoor humidity,on sunny days,the average humidity in a solar greenhouse was higher than in the plastic greenhouse,the average values were 73.4%and 70.2%respectively.On cloudy days,the average humidity in a solar greenhouse was higher than in the plastic greenhouse too,the average values are 81.4%and 76.0%respectively.but the difference was not so obvious on cloudy days.According to the changes of the seasons,the average humidity in a solar greenhouse and in the plastic greenhouse were 68.2% and 72.1% in the whole experimental period,evidence showed the reverse that dues to different management.This research was of great significance to explore the different types of facilities agriculture development.