【摘要】 为了解林分内芬多精成分及相对含量时间动态特征,以柏木(Cupressus funebris)、马尾松(Pinus massoniana)、柳杉(Cryptomeria fortune)、香樟(Cinnamomum septentrionale)和苦竹(Pleioblastus amarus)林分为研究对象,在2018年的2月、5月、8月和11月分别对5个林分内的VOCs进行了4次采样,采用气相色谱-质谱(GC/MS)联机法分析、鉴定林分VOCs成分及其相对含量。结果表明:内源萜烯类和外源烷类是林分VOCs的主要组成部分;所有样本均检出了芬多精主要成分桉油精和(+)-柠檬烯,其他萜烯类偶有检出;林分芬多精相对含量呈先升高再降低的趋势,在5月和8月最高;柏木林分芬多精含量在5月和8月明显低于其他林分;柳杉林分芬多精相对含量在11月份明显高于其他林分。更多还原

【Abstract】 In order to investigate the temporal dynamic characteristics of chemical components and relative contents of phytoncide, five types of forest stands, Cupressus funebris, Pinus massoniana, Cryptomeria fortune, Cinnamomum septentrionale and Pleioblastus amarus were chosen as the research object in Sichuan province. And the VOCs from the five forest stands were sampled in February, May, August, November in 2018. Then the chemical components and their relative content in the VOCs were analyzed by gas chromatography-mass spectrometry(GC/MS). The results showed that(1) endogenous terpenes and exogenous alkanes were the main components of VOCs in the forest stands;(2) eucalyptus oleoresin and(+)-Dipentene were the main components of phytoncide in all samples, and other terpenes were occasionally detected;(3) the relative content of phytoncide increased at first and then decreased, with the highest in May and August;(4) the relative content of phytoncide in the Cupressus funebris stand was significantly lower than that in other forest stands in May and August;(5) the relative content of phytoncide in the Cryptomeria fortune stand was significantly higher than that in other forest stands in November.更多还原