Preliminary Analysis on Microclimate Characteristic and Forecasting Model in Greenhouse of Heilongjiang Province

In order to understand the change of meteorological elements in sunlight greenhouse of Heilongjiang province,based on the observation data of air temperature,soil temperature and soil humidity from September in 2012to August in 2013in greenhouse of Gongzheng town in Shuangcheng city,the microclimate characteristic in greenhouse and temperature contrast inside and outside greenhouse were analyzed and related model were established.The results showed that temperature contrast in autumn,winter and spring had larger tempenture difference than that in summer,temperature inside greenhouse was higher apparently than that outside greenhouse.Temperature inside greenhouse was below 10℃ without heating supply in cold.It is difficult to meet the demands of the growth of vegetable.Soil temperature and soil humidity of each soil layers had changed identically.Related model of temperature outside greenhouse and temperature inside greenhouse was established.The absolute error ranged from 0℃to 2.8℃in most of the time.