Effect of Environmental Factors on Iranian Coppice Oak Trees (Case Study: Study of Site Factors on diameter increment)

Iranian Coppice Oak Forest has been an appropriate of a wide range of middle Zagros region vegetative. Whereas Iranian oak (Quercus persica) has shown in the wide gamut of different habitat climate, conjecture that on the limited altitude, habitat, have considerable affects on diameter increment in this species. In this study, in order to determining the site affects on diameter increment, three sites were selected on foothill, heights and plain area and in each site 40 coppice were selected randomly. One the several rudiment of each coppice, one pillar was selected randomly and cut a disk and scan with loop and caliper on lab. Results showed that the mean of medium diameters increment (on contemporary classes) have been increased by sequential site issue. Thus ANOVA test was done and result was significant (P= 0.05), Krusk al-Walis Nonparametric test ratifies these results as well. Also comparing percentage of diameter increment at three 5 year period of latest growth has been done between three sites discretely and result doesnt show any significant difference.