Compositionand Change of Volatile Organic Compounds in Pinustaiwanensis Forest

In spring, summer, autumn and winter from April 2016 to January 2017, composition and variation of volatile organic compounds (VOCs) were determinedbyTDS-GC-MS in the air of Pinustaiwanensisforest in Sihaishan Forest Farm of Yongjia, Zhejiang province.The results showed that there weretotally 69VOCs of 9 types, among which terpenes occupied 40.92 % of the total VOCs, including 1R-.alpha.-Pinene, Eucalyptol and D-Limonene.Other types, aldehydesand lipoid took respectively12.45%, 12.22% and 11.00%.In the spring, summer and autumn, terpenes were the highest among the VOCs, which accounted 32.06%, 52.15% and 58.86%.While in winter, lipoid was the highest among the VOCs, accounting 34.29%.The result indicated thatterpenes were relatively high in the air of P.taiwanensis forest, which might be better for forest medicine.