عنوان مقاله [English]
Importance of wood as a basic material in industry, along its broad uses and diverse by-products leads us to change our direction from exploitation of natural forests towards artificial forest plantation. This is done mainly by selecting suitable and fast-growing species. Understanding the adaptation and the growth potential of forest trees in different environments is one of the earliest steps in approaching this great goal.
In this study, growth and survival trend of ten forest tree species including Pinus brutia, Cupressus sempervirens var. horizontalis, Cupressus arizonica, Pinus eldarica, Elaeagnus angustifolia, Robinia pseudoacacia, Quercus Brantii, Ailanthus altissima, Fraxinus rotundifolia and Pinus nigra in a three hectare forest area in Kamfirooz, Fars province were investigated under RCBD** (Four replicates) for ten years (1993-2003). The area is located at longitude of 52º 10' E and latitude of 32º 22' N. Seedlings were planted at spacing of 3×3m (44 seedling at each) The seedlings survival, collar diameter and height were measured twice a year, at beginning and at end of growth period. The SPSS program, and ANOVA and Duncan tests were used to analyze the data.
The results showed that there were significant differences (p<0.05) between the species performances and there were significant relationship between the species height and diameter and between the species growth parameters and the growth periods. P. brutia and C. arizonica had significantly better growth and survival compared to other species. On the other hand, Pinus nigra showed the least survival, and Q. Brantii showedthe least height and diameter growth.
Overall, it seems that the needleleaved species, except P. nigra,are more successful than thebroadleaved species in respect to their survival, diameter and height parameters.