对来源于福建省28个县(市)的329份樟树〔Cinnamomum camphora (L.) Presl〕叶精油的21个主要化学成分(占总化学成分含量的90.735%)进行了主成分分析和聚类分析。提取出12个主成分因子,累计贡献率达到84.342%,可基本描述樟树叶精油21个主要化学成分的变异情况。取λ=5.5,329份叶精油样品可被分为5个化学型:芳樟型(主要成分为芳樟醇)、脑樟型(主要成分为樟脑)、桉樟型(主要成分为1,8-桉叶油素)、黄樟型(主要成分为黄樟油素)和杂樟型(无明显主要成分)。除杂樟型外,其他化学型樟树叶精油的主要化学成分均较一致。 

Principle component and cluster analyses on 21 main compositions (accounting for 90.735% of total content)in 329 samples of essential oil from Cinnamomum camphora (L.) Preslleaffrom 28 countiesin Fujian Province were conducted. Twelve principle component factors which the accumulative contribution rate reached to 84.342% were selected from 21 main compositions in essential oil. Variation status of 21 main compositions in essential oil could be explained with the 12 principle component factors. At λ= 5. 5, 329 samples of leaf essential oil were clustered into five chemistry types: linalool-type, camphora-type,cineol-type, safrole-type and hybrid-type, and the main compositions of linalool-type, camphora-type, cineol-type and safrole-type were linalool,  camphora,  1, 8-cineol and safrole respectively, while the hybrid-type had no distinct main composition. The main chemical compositions of leaf essential oil were obviously consistent in each chemistry type except the hybrid-type.