Study of beech (Fagus orientalis Lipsky) trees morphology of according to elevation in Guilan province (Hyrcaian forests), Iran

One of the major goals of silviculture and silvics is creating well form trees in natural and hand plant forests. A forest with proper quality can be cultured by true selection and cultural cares. Knowing tree trunks morphology is very essential for assessing trunk quality, considering that, the quality of trunks fundament was considerably important in veneer industry. In third part of Guilan-Roudbar forests 914 trees of Beech was selected by systematic-random method and characterʹs quality of those such as curvature in the main trunk, trunk healthy and multi trunk were investigated. Also because of inventory in different level of height (from 380 meters to 1220 meters in north direct) this area was categorized among several height level (7 levels) that distance between from central line of every level to later level was supposed 200 meters(height different). Eventually all data compared with Kolmogorov-Smirnov (k-s) test at the level of %1 and %5. Results show that: Absolutely the most of amount of Multi trunk character concerns to the class of middle course trunk. Absolutely the most of amount of trees are healthy trunk. Absolutely the most of amount of curvatureʹs character concern to the class without curvature. Also these characters among height levels show a significant relationship which it may has relationship with the effect of height of sea level (site factors) onto these quality characters of trees.