在油松（Pinus tabulaefomis Carr．）主要天然分布区晋、冀、陕、甘4省，选择12个种源36个林分（每个林分8株成年油松样木），利用气相色谱和气质联用技术，测定了油松针叶萜类相对含量，并分析了所含萜类总数在不同种源间、种源内不同林分间的差异。结果表明：（1）油松针叶萜类相对含量以随机变异为主；（2）有2种化合物（γ-古芙烯和一未知物）及化合物总数具有较强的生态型变异特点；（3）多数化合物的相对含量存在显著的种源间差异，部分存在种源内林分间差异，多数化合物的种源间差异大于种源内林分间差异。

The geographical variations of foliar volatile terpenes of Pinus tabulaeformis Carr. were determined. The needle samples were collected from 36 sampling stands at 12 sampling sites of native forest in 4 provinces (Shanxi, Hebei, Shaanxi and Gansu), and 8 sampling trees in each stand were collected. The results indicated that: ( 1 ) the geographical variations of relative contents of most foliar terpenes are irregular; (2) the relative content of compounds number 04 (unidentified) and 21 ( 7-gurjunene) show ecological variations in a certain degree; ( 3 ) there are significant variations among provenances and among stands within provenance, and the variations among provenances are greater than those among stands within provenance.