Abstract:

This paper studied the wood basic density, growth ring width, proportion of late wood and anatomical features for 15 years Masson pine plantations with 5 different planting densities in Longli, Guizhou province. The results show that the planting densities greatly affect the growth ring width, proportion of late wood and tracheid row through variance analysis. As planting density increased, the growth ring width and tracheid row decreased but proportion of late wood increased. Although the effect of planting density on the wood basic density is not significant, but the regularity is obvious that wood basic density increased with the increasing of planting density, but decreased if it is too closed. The effect of planting densities on tracheid form vary with age. The chang of average value of tracheid form in different planting densities is not so great, but the tendency of the tracheid length's increasing with their age will be affected by its plangting density. Its has no significant if planting density is small. The proportions of tissues is not affcted by the planting density.

Key words: Masson pine, Planting density, Wood property, Wood basic density, Anatomical feature