滇中高原双层塑料薄膜温室保温性能测试分析

 由于滇中地区典型单栋塑料温室存在保温性能不足的缺点,该试验同时对双层薄膜覆盖、单层薄膜覆盖和室外3种情况的最低温度进行了对比测试,对双层非充气塑料薄膜在该类温室中的保温效果进行了分析。结果表明:采用双层非冲气塑料薄膜,即在现有普通大棚内加设一层薄膜（间距20～30 cm）,在温室无遮挡,光照条件正常的情况下,冬季一月份前后室内最低平均气温可达5.37 ℃,比单层薄膜温室提高5.68 ℃,比室外提高3.25 ℃,保温效果显著。

Test and Analysis of Thermal Screen Effects in Double-plastic Greenhouse in Central Area of Yunnan

For the weakness in heat preservation of typical single-ridge plastics greenhouse in Yunnan central area, on the contrary,the lowest indoor and outdoor temprature in winter in double-plastic greenhouse and single-plastic greenhouse were tested. The thermal screen effects of double-plastic greenhouse was analysizd. The results show that: using the double-plastic in greenhouse,that is,installing an other plastic layer in the presented popular greenhouse (the space is 20～30 cm),could raise the temprature notablely while the sun light is normal. The indoor lowest temprature could up to 5.37 ℃ averagely. It is 5.68 ℃ higher than the lowest temprature in the greenhouse with only one layer plastic and 3.25 ℃ higher than the outdoor lowest temprature.