مجله جنگل ایران (Feb 2017)
Quantitative changes of forest stand structure through full calipering method
Abstract
By examining the forest structure not only the forest conditions such as species composition, story and succession are determined, but also the future of forest in relation to growth, species diversity changes, canopy cover and basal area could be predicted. The purpose of this study was to quantify the stand structure and forest stands dynamics through triangle structure method. The current survey was carried out in compartments 305, 306, 309, 310 and 311 about 150 ha in Gorazbon district of experimental Kheyrud forest. For this purpose, two full calipering periods were used. The frequency and stocking volume at each diameter class were then obtained. The results showed that there was not significant differences between two inventory periods about beech, hornbeam, and maple individuals and their volume by using paired t-test. Generally, due to subtle changes, it is concluded that a 10-year period is not appropriate to examine the considered factors. Therefore, it is necessary the changes monitoring is done by repeated inventories in successive 10 year periods. Therefore, it is suggested the monitoring methods and control of forest structure dynamics over times through reliable data, as a solution for the forest management practices to increase the quality and quantity of forest stands by management interferences in the nature oriented silviculture context are specially considered.
