| چکیده انگلیسی مقاله |
To evaluate the quantitative and qualitative characteristics of forest park of Shourab's trees, consisting of Pinus brutia, Pinus pinea, Cupressus arizonica, Cupressus sempervirens var. sempervirens, Cupressus sempervirens var. Horizontals, Ailantus altissima, Robinia pseudoacasia and Fraxinus rotundifolia, inventory as a systematic random sampling and in statistical grid 100×150 meter and in 30 circular sample plots (2R) was undertaken. In each sample plot, tree's quantitative and qualitative characteristics, such as diameter at breast height,basal area of tree, tree height, crown coverage percent, h/d factor, regeneration, vitality, crown form and branchiness on the trunk were examined and measured. According to the results, about 75 percent of the species was due to conifers, especially Pinus brutia (45 percent), and 25 percent of hardwood species formed forest park trees. Also the average number of species in whole park was 604.05 per ha. The results shown that the average diameter at breast height, tree height and basal area of tree softwood species-particularly Pinus brutia and Cupressus arizonica, amounted to 23.02 cm, 9.5 m, 0.048 m2 and 13.47 cm, 8.02 m and 0.042 m2 higher than other species. With the concern of vitality, in softwoods, Cupressus arizonica specie had the most vitality range (85/75) percent and in hardwoods , Robinia pseudoacasia and species had the lowest vitality range (37.27) percent. Finally, we could say Softwood species afforested in terms of qualitative and quantitative indicators of hardwood species, is preferred. Nevertheless, the species of: Pinus brutia and Cupressus arizonica which have exhibited comparatively better performance are suggested for future afforestation expansion in this park. < |