The Study of the Effects of Age and Height of Plants on the Chemical Components of Eucalyptus Camaldulensis Wood

This study aimed at investigating the effects of the age and height of trees on the chemical components of Eucalyptus Camaldulensis wood. For this aim, five normal Eucalyptus trees were randomly cut down from the research forest of Dr. Bahramneya, located in Shastkolateh of Gorgan. From each tree four disks from the breast height of 25%, 50% and 75% of tree's trunk were selected. The specimens were taken from the pith to the bark and from the bottom to the top of tree trunk to determine and measure the chemical components such as Cellulose, Lignin, Extractives soluble in alchoal-acetone and ash according to TAPPI standard. Then the data were statistically analysed. The results indicated that Cellulose content increased from the pith to the bark and decreased from the bottom to the top as the trees grew older. Also the Lignin content decreased from the pith to the bark and increased from the bottom to the top of tree trunk. The extractives soluble in alchoal-acetone decreased by the increase of the age and height of trees. The pattern of ash changes also followed the pattern of extractives in three axes from the pith towards the bark. In general, it can be concluded that the effects of the age of Eucalyptus Camaldulensis plant on the chemical components of its wood is greater than the effect of its height.