Characteristics and some technological properties of Juglans regia L. trees grown in Duhok province

Joint Authors

Sulayman, Hishyar H.
Dawud, Nasir A.
Abd al-Qadir, Aree Adil
Husayn, Bilnd J.

Source

مجلة جامعة دهوك

Publisher

University of Duhok

Publication Date

2016-06-30

Country of Publication

Iraq

No. of Pages

8

Main Subjects

Natural & Life Sciences (Multidisciplinary)

English Abstract

Juglans regia L.

is an oldest native species and cultivated throughout Kurdistan region\Iraq.

The sample trees were harvested from Duhok province.

Samples were taken at breast height from different ages of trees.

In this research, physical, anatomical properties of the wood were investigated, and some morphological properties of its wood also evaluated including the percentage of Heartwood (HWP) (31.49 %), Sapwood (SWP) (65.51 %), Bark percentage (BP) (21.74 %) and Annual Ring Width (ARW) (4.01cm).

The values of physical properties were: moisture content for HWP and SWP were (43.85, 59.50%), were for all studied trees were (52.89 %), whereas specific gravity for HWP and SWP were (0.701, 0.606) and for all studied trees was (0.671).

While basic density was(0.578g/cm3).Volumetric shrinkage and volumetric swelling were (12.56, 14.44 %), fiber saturation point (21.91%), cell wall (44.781%) and porosity (55.48 %).The values of anatomical properties were: fiber length(1.585 mm), fiber diameter at the mid-point of the fiber(34.00 μm),fiber double cell wall thickness(16.12 μm) and fiber lumen diameter (7.88 μm),vessel length (0.545mm), vessel diameter at the mid- point of the vessel(179.806 μm), vessel lumen diameter (134.136 μm), slenderness ratio(69.85), runkel ratio (2.339).

Due to moderate specific gravity and other physical properties, walnut wood is suitable for structural application.

Also could be the walnut fibers are a promising fibrous raw material for paper production.

Data Type

Conference Papers

Record ID

BIM-797432

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