VARATION OF RINGS WIDTH AND LTS EFFECT ON WOOD SPECIFIC GRAVITY OF Pinus brutia TEN. AND Cupressus sempervirens VAR. Pyramidalis TOZZ. TREES GROWN IN NINAVAH PLANTATION

Al-Takay, Talal

doi:10.33899/magrj.2018.161425

	VARATION OF RINGS WIDTH AND LTS EFFECT ON WOOD SPECIFIC GRAVITY OF Pinus brutia TEN. AND Cupressus sempervirens VAR. Pyramidalis TOZZ. TREES GROWN IN NINAVAH PLANTATION
Mesopotamia Journal of Agriculture
Article 15, Volume 46, Issue 1, 2018, Pages 135-142 PDF (427.29 K)
Document Type: Research
DOI: 10.33899/magrj.2018.161425
Author
Talal Al-Takay^*
Forestry Dept., College of Agriculture and Forestry, Mosul University. Iraq
Abstract
Four trees growing in Ninavah plantation were chosen, two of them are Pinus brutiaTen.and the others are Cupressus sempervirens var. pyramidalis Tozz.. The trees were filled, from each tree six sample discs of (25 mm) thick were taken, three of them directly above (1.3m) and the others below, then each disc were radially sawn in the four directions of the radius, the test specimens were cut from these with the dimensions of (25 × 25 × 25 mm) used for measuring annual ring width and wood specific gravity. A significant difference in ring width and wood specific gravity was observed along the radial axis from pith to bark, the value of ring width decreases while wood specific gravity increase, and significant negative relationships had been found between ring width and wood specific gravity in both pine and cypress. There were significant difference between the trees. The mean value of ring width was (3.951mm) for pine while it was (3.141mm) for cypress, and the mean wood specific gravity of pine was (0.556) while it was (0.505) for cypress.
Keywords
specific gravity; ring width; pine trees; cypress trees

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