为走出农民增收和农业增效困境,武威市确立了发展日光温室生产的主体生产模式,通过气象观测对引进和推广的新型日光温室进行有益探索,重点对比以土质墙体和草砖为后墙的2种温室冬季的保温性。结果表明:(1)与温室外温度相比,2种结构温室内的温度明显偏高,且土墙保温蓄热效果明显好于草砖。其中,土墙温室较草砖温室旬平均气温偏高1.8~1.9℃,旬极端最低气温偏高2.8~2.9℃,旬平均地温偏高0.9~4.1℃;(2)从不同时段看,土墙蓄热冷却速度明显低于草砖。冬季盖帘时段,土墙温室内气温较草砖偏高3.4~10.8℃,平均偏高3.1℃,地温偏高0.1~7.4℃,平均偏高3.5℃;揭帘时段,土墙温室内气温较草砖偏高4.1~14.7℃,平均偏高4.2℃,地温偏高0.3~7.7℃,平均偏高3.7℃;(3)从典型天气条件看,夜间及清晨土墙室内气温较草砖偏高幅度晴天〉阴天〉雪天;白天偏高幅度晴天的最大,雪天的次之,阴天相差不大。土墙温室内地温变化幅度较小,晴天和阴天草砖温室内地温变化幅度略大,且土墙温室内地温高于草砖,雪天相差最大;(4)2种温室结构对产量的影响效果显著,辣椒总产量土墙温室高于草砖温室18%。
In order to improve the agricultural benefit and farmer's income,the sunlight greenhouse production as the main mode was established in Wuwei of the Eastern Hexi Corridor. The aim of this paper was to make beneficial exploration about new sunlight greenhouse by observing the meteorological factors,and the heat preservation properties of mud brick wall and grass brick wall structure sunlight greenhouses in winter were compared. The results are as follows:( 1) Compared with outdoor temperature,the air temperature and surface temperature in greenhouses with two kinds of structure were higher,and the heat preservation effect of greenhouses with mud brick wall was better than that of grass brick wall greenhouse. The ten- day average air temperature,the ten- day extreme minimum temperature and the ten- day ground temperature of mud brick wall greenhouse were 1. 8- 1. 9 ℃,2. 8- 2. 9 ℃ and 0. 9- 4. 1℃ higher than those of grass brick wall greenhouse,respectively..( 2) The heating and cooling rates of mud brick wall greenhouse were lower than that of grass brick wall greenhous. During the covering curtain period in winter,the indoor air temperature and surface temperature of greenhouse with mud brick structure were 3. 4- 10. 8 ℃ and 0. 1- 7. 4 ℃ higher than those of grass brick wall greenhouse,while they were 4. 1- 14. 7 ℃ and 0. 3- 7. 7 ℃ higher during uncovering curtain period.(3) From typical weather conditions,ithe indoor air temperature of mud brick wall greenhouse was higher than that of grass brick wall greenhouse at night and early morning,and the amplitude was on sunny,cloudy and snowy day in turn,while the air temperature of mud brick wall was highest in the daytime of sunny day,and that in mud brick wall green house and grass brick wall greenhouse was little difference under cloudy day condition. The change of surface temperature of mud brick wall greenhouse was small,while that of grass brick wall greenhouse was slightly big on sunny and cloudy days. Moreover,the surface temperatu