Effect of PO & PE Film on Environmental Condition，Strawberry Yield and Quality in Over-winter Solar Greenhouse
LI Dong-xing1，2，ZHAO Jing1，2，LI Shu- shan1，2，CHEN Li-zhen1，2，LI Bao- an1，2，LI Li1
（1Beijing Jingpeng International Hi-Tech Corporation，Beijing 100094，China；2Beijing City Engineering Research Center of Plant Factory，Beijing 100094，China）
Taking strawberry‘Hongyan’ as test material，this study compared the effects of PO and PE film covering materials on greenhouse environment conditions，including temperature，humidity，illumination and strawberry yield and quality in over-winter sunlight greenhouse. The results showed that using PO film the average temperature of greenhouse was about 1 ℃ higher than that using PE film. The heat preservation was better，humidity was suitable，and lightening effect was also good in greenhouse using PO film. Besides，the strawberry yield increased by 23.27%，rotten fruit percentage was reduced ，contents of soluble solids and VC，sugar/acid ratio were all increased obviously，and the strawberry tasted even better.
