Site demands and some silvicultural characteristic of Caucasian false walnut (Pterocarya fraxinifolia Spach.) in Lorestan province

بررسی خصوصیات رویشگاهی و جنگل‌شناسی توده لرگ در استان لرستان This research was carried out to identify the site demands and silvicultural characteristics of Caucasian false walnut in Lorestan province, south western of Iran, far from its common natural habitat in northern Iran. Considering the small distribution area of this species, 100% inventory of qualitative and quantitative characteristics of all trees were made. Moreover, the climatic condition and soil properties of the stand were studied. Results showed that climate of the studied area is semi-humid and cold. The stand appears at a stream terrace in the calcareous bedrock, clay loam soil with a pH of 7.5. Almost 58% of trees were coppice while only 42% had seed origin. The minimum and maximum diameter of false walnut trees were 2 and 28 cm, respectively. The mean annual diameter increment was calculated to 3.8 mm and the total volume was estimated to 389.5 m3ha-1. The minimum, maximum and mean height of trees were 2.3, 28 and 19.1 m, respectively. The frequency of regeneration was estimated to 15226 per hectare