The effect of climatice variables on the growth rings width of oak wood ( Quercus castanifolia ) using denderochoronology science (a case study for talimrood)
Abstract
In this research the relation between climate and the width of growth circles of oak species has been investigated in region 32 of dohezar in Tonekabon . to do this . three sound oak tree were selected and each of which was cut to get a disk in chest level and they were coded and transferred to tehran university laboratory and the level of width of growth circle was measured using binocolar and them the velation between these fwatures and climate conditions ( temperature rainfall (precipitation) and humidity) was calculated using piersoon correlation results showed that changes rate of the width of growth circles increase in the first years of growth and decrease in the final years and this characterizes the activity of young and mature cambium.There is a negative relative relation between the width of growth circles and rainfall in april and has no meaningful relation with other months and also this relation between the width of growth circles and monthly average temperature in January . February .March and July is negatively related and this relation is meaningful in the reliabity level of 95% the relation between the width of growth circles and relative humidity indicated that the highest correlation between the width of growth circles and November (0.001) have been observed. The prediction of the width of growth circles of oak tree in the next 20 years using time series analysis suggests that with the increase in the age of the species the width of growth rings decreases and the fluctuations in decreasing growth is accompanied with identical changes.
Key words : Denderochronology ,Oak , growth rings , temperature , percipation
