关键词: 采收, 采收

Abstract: Abstract: In order to accurately evaluate the insulation performance of several typical greenhouses built in Tianjin in winter disastrous weather such as low temperatures and overcast weather, this paper analyses the meteorological indexes of three structures of solar greenhouse. the meteorological indexes include average temperature, maximum temperature, minimum temperature, duration of temperature below 10 ℃ deviation of minimum temperature at night and the structures of solar greenhouse include mud wall brick wall and high standard brick wall. The results show that, in the two kinds of disastrous weather conditions, the insulation performance of the mud wall is the best. In overcast weather, the insulation performance of high standards brick wall is lower than that of mud wall, but is basically the same to that of brick wall. Under the condition of low temperature, the insulation performance of high standard brick wall is better than that of brick wall. The brick wall is the lowest one on insulation performance. The research results have a good guiding significance for the defense of winter cold disasters of solar Greenhouse.