Juvenile Wood and Its Properties

Year 2009, Volume: 11 Issue: 16, 25 - 32, 06.11.2009

Mustafa Burak Arslan Deniz Aydemir

Abstract

Wood based products (especially building sector) are desired homogeneous as much as possible. Juvenile wood

which occurs at first years of trees growth (approximately 5-20 years) may impair this homogeneous. Because

juvenile wood show too different in mature wood, which comprise of after juvenile wood (more than 20 years)

and have higher strength properties. It’s significant to determine juvenile wood tissue of trees which used forest

product industrial in Turkey like pines, elm, alder, and beech owing to the poorer mechanical properties than

mature wood. Therefore, unexpected result may appear on wood materials that manufactured in natural juvenile

forest or plantation. In this paper is interpreted by study to studies compared physical, chemical, mechanical

properties of juvenile and mature wood. Thus it is indicated that technologic properties of wood based materials

are affected by tree age as scientific.

Keywords

Juvenile wood, Mature wood, Anatomic properties, Mechanical properties

Genç Odun ve Özellikleri

Abstract

Ahşap malzemenin (özellikle yapı sektöründe) olabildiğince homojen olması istenmektedir. Ağaçların büyüme

dönemlerinin ilk yıllarında (yaklaşık olarak 5 ile 20 yıl arası) oluşan genç odun bu homojenliğin bozulmasına

neden olabilir. Çünkü genç odun anatomik ve teknolojik özellikler bakımından olgun odundan (genç odundan

sonra oluşan ve daha yüksek direnç değerlerine sahip olan kısım) daha farklı özelliklere sahiptir. Ülkemizde

özellikle kereste endüstrisi olmak üzere, orman ürünleri sanayinde kullanılan ağaçların (çam türleri, karaağaç,

kızılağaç, kayın vb.) genç odun dokusunun özelliklerinin belirlenmesi büyük önem taşımaktadır. Zira genç odun

dokularının mekanik özellikleri olgun odundan daha düşüktür. Bu nedenle doğal genç ormanlardan ya da

plantasyonlardan üretilen ağaç malzemelerde beklenmedik sonuçlar ortaya çıkarabilir. Bu çalışmada, ağaçların

genç ve odun dokularının fiziksel, kimyasal ve mekanik özelliklerinin karşılaştırıldığı çalışmalar mercek altına

alınarak yorumlanmıştır. Bu sayede, odun esaslı malzemelerin teknolojik özelliklerine, ağaç yaşının etkisi

bilimsel olarak ortaya konmaktadır.

Keywords

Genç odun, Olgun odun, Anatomik özellikler, Mekanik özellikler

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