摘要：The study was carried out to estimate effects of growth (age and diameter at breast height) and geographic (aspect and altitude) characteristics on content and two major constituents (a-pinene and P-pi-nene) of essential oil obtained from seeds of three Taurus cedar (Cedrus libani A. Rich.) populations sampled from Isparta district at Southern part of Turkey. Besides, content and constituents of essential oil were compared for altitude, aspect, age and diameter at breast height classes.The essential oil content changed between 1.66-2.09% and the main constituents were identified as a-pinene and P-pinene with an average of 29% and 21%, respectively. Significant differences (p<0.05) were found among the populations, and within population in terms of age, altitude, and diameter classes for the content and constituents of the essential oil. Studied growth and geographic characters were generally not significantly (p>0.05) effective on the content and main constituents of essential oil, while it changed in individual populations. Results of the study emphasized the importance of growth and geographic characters on content and main constituents of essential oil.
