Microclimate Capacity Analysis of Two Different Modern Greenhouses in Jingzhou City in Summer

The microclimate capacity of plastic and glass greenhouses in Jingzhou City in Summer were studied.The results showed that day changes of air temperature,soil temperature and air humidity were higher in greenhouses than in outside,while illumination intensity was lower in greenhouse than in outside.The microclimate of glass greenhouse was superior to that of plastic greenhouse.Differences of air temperature between plastic greenhouse inside and outside were from 0.2 to 2.1 ℃,differences of soil temperature from 0.4 to 1.7 ℃,and differences of air humidity from 0.8 to 2.3%;differences of air temperature between glass greenhouse inside and outside were from 0.4 to 2.7 ℃,differences of soil temperature from 0.4 to 2.7 ℃,and differences of air humidity from 1.6 to 6.0%.Illumination intensity of plastic greenhouse was only from 34 to 46% of outside,and illumination intensity of glass greenhouse from 45 to 80%.