Abstract:

In order to reasonably evaluate the adaptability and productivity of exotic Toona ciliata provenances introduced in Wuhan, four T. ciliata provenances were used as experimental materials, the growth traits such as diameter at breast height (DBH) and tree height at 2, 4, 6 and 8 a, as well as the Pilodyn detection value and the basic density indexes of wood in the 8-year-old T. ciliata were investigated and determined. The results showed that there were highly significant differences in DBH, tree height and volume of 8 a trees among different provenances. The average value of 8-year-old Pilodyn detection value (Pn) of the four provenances was 46.53 mm, and the average values of the south-facing outer wood density (Ds) and the south-facing whole wood density (Db) were 0.3938 and 0.38845 g/cm³ respectively, and there were highly significant differences in these three wood properties among different provenances. Regression analysis showed that there was a highly significant negative linear correlation between Pn and Db and between Pn and Ds. Pearson’s correlation analysis among all individuals of different provenances showed that there was a highly significant positive correlation between DBH, tree height, and volume of lumber at 8 a, as well as a highly significant positive correlation between the growth indicators and the value of Pn, but a highly significant negative correlation between the value of Pn and the values of Ds and Db, and a highly significant positive correlation between the values of Ds and Db.

Key words: Toona ciliata, provenance, growth traits, Pilodyn detection value, wood density, correlation analysis