Study in Winter Function of Beijing-Qinghai Science and Technology Cooperation Greenhouse

Winter function features of Beijing-Qinghai science and technology cooperation gresshouse were analyzed.The results showed that minimum temperature was 6.5℃ in gresshouse of winter,the continuous days were 1-3 days.The temperature was kept at 20℃ most time during a day.The air humidity had little change in 0:00-6:00 of every day,generally kept between 79.8%-84.6%.There was an inverse correlation between air humidity and air temperature.The minimum dew point temperature was in 6:00 of every day.There was an positive correlation between dew point temperature and air temperature.The ground temperature was kept between 9.5℃-21.7℃ in the depth of 10 cm.The light intensity was at 20-30 klx in gresshouse of winter,the maximum light intensity could reach 42 klx.