The variability of pulp-wood basic specific gravity of softwood

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

Vladimír Gryc¹  Jiří Holan¹ 

[1] Ústav nauky o dřevě, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 3, 613 00 Brno, Česká republika;

关键词: basic density;    round-wood poles;    Norway spruce;    Scots pine;   

DOI  :  10.11118/actaun200452040073

来源: DOAJ

【 摘 要 】

In the present study, basic density of pulpwood of Norway spruce (Piceas abies /L./ Karst.) and Scots pine (Pinus sylvestris L.) was investigated. The variability of basic density and factors applied are out of concern. Factors are characterised by localization along the log, growing conditions defined by geographic area of Czech Republic, diameter of log, and the storing of logs within transport loading. Basic density was determined on cores taken by modified Pressler borer in the radial direction from bark to pith. The average basic density of Norway spruce is comparable to Scots pine, as well as the variation coefficient. Basic density of Norway spruce was found 443 kg.m-3 (Vx = 13.9%) where as the Scots pine base density was 450 kg.m-3 (Vx = 15.5%). Basic density was significantly influenced by all factors assessed except the localization of cores along logs. The investigation demonstrated that basic density can be affected by locality of supply in comparison to within logs variability that have much lower importance.

【 授权许可】

Unknown