Zmienność wybranych cech makrostruktury i gęstości drewna dębu czerwonego (Quercus rubra L.) z Polski południowo-wschodniej

• Autorzy: Wasik R. , Michalec K.

Warianty tytułu

EN

Variability of selected macrostructural features and the wood density of northern red oak (Quercus rubra L.) from south-eastern Poland

• Języki publikacji: PL

Abstrakty

EN

The aim of the paper was to determine the variability of selected macrostructural features and wood density for northern red oak growing in south−eastern Poland. On 4 study plots, we sampled each tree, taking an increment core from the northern side of the trunk, from the height of 1.3 m. The number of tree rings, width and the share of sapwood was measured. The cores were scanned and then tree ring and latewood widths were measured. The latewood proportion in each ring was calculated. Next, starting from the bark, the cores were divided into sections containing 10 annual rings. The relative wood density was determined for each section, then the density was calculated for entire stem cross−section. The mean sapwood width was 1.5 cm. It included 7 annual rings on average, and its share in the trunk cross−sectional area reached 17%. Younger red oaks (II and III age classes) had a significantly higher share of sapwood compared to older trees (IV and V age classes). The investigated red oaks formed narrow−ring wood with an average width of 2.16 mm. The trees growing on deciduous forest habitat had a more equal tree ring width compared to trees from coniferous forest habitats, where this feature showed also higher variability. The latewood proportion in the studied red oaks was 60% on average. The mean relative wood density was 0.578 g/cm³ and it was slightly higher than the value given for red oaks growing in North America. The calculated absolute density (with an assumed volumetric shrinkage from 12.9 to 13.7%) varied from 0.664 to 0.670 g/cm³. It classifies the investigated wood as moderately heavy. Similar density values are given for native oaks, which allows to assume that the technical quality of the wood of red oaks growing in Poland is similar to native oak species. The wood of trees from deciduous forest habitat showed a significantly higher density and a more equal distribution compared to the trees from coniferous forest sites. The raw material of red oaks obtained from deciduous forest habitats should characterize by a better technical quality of wood in comparison with that obtained from coniferous forest sites.

• Wydawca: -
• Czasopismo: Sylwan
• Rocznik: 2020
• Tom: 164
• Numer: 10
• Opis fizyczny: s.850-859,rys.,tab.,bibliogr.

Twórcy

autor

Wasik R.

• Uniwersytet Rolniczy w Krakowie, al. 29 Listopada 46, 31-425 Kraków

autor

Michalec K.

• Uniwersytet Rolniczy w Krakowie, al. 29 Listopada 46, 31-425 Kraków

Bibliografia

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Identyfikatory

DOI

10.26202