%0 Journal Article %T Seasonal dynamic of radial growth in oak (Quercus castaneifolia C.A. May.) (Case study: Educational and Forest Research of University of Tehran, Nowshahr-Koliak) %J Iranian Journal of Forest %I Iranian Society of Forestry %Z 2008-6113 %D 2015 %\ 12/01/2015 %V 6 %N 3 %P 351-361 %! Seasonal dynamic of radial growth in oak (Quercus castaneifolia C.A. May.) (Case study: Educational and Forest Research of University of Tehran, Nowshahr-Koliak) %K Cambium zone %K Gompertz function %K Quercus castaneifolia %K Radial growth %R %X The beginning and the ending of radial growth in trees depend on genetics and climatic factors and its intensity varies during a growing season. Studying wood formation dynamics in a growing season will increase our knowledge about xylogenesis of important species and the influencing parameters. For this reason and in order to have a better understanding of a radial growth in oak, four Quercus castaneifolia individual treeswere selected in the research forest of University of Tehran located in the Hyrcanian forest. In 2012, micro-core samples were extracted from trees by Tropher in monthly intervals. Cambial cell divisions and radial growth started approximately on mid-April and terminated at the end of September. The highest number of cambium cell (15-17) and the maximum daily growth rates of all trees were achieved around Mid-June. The results of this research showed that the majority of radial growth in oak occurs from May to mid- July and this fact should be considered in dendroclimatological studies. %U https://www.ijf-isaforestry.ir/article_7981_250bacaa5b12429c8b0c3a8e399bca18.pdf