Wood Density of Northern Red Oak and Pedunculate Oak Grown in Former Brown Coal Mine in the Czech Republic

Abstract

This study deals with the characteristics of wood of two different species of oaks, the non-native northern red oak (Quercus rubra L.) and the native pedunculate oak (Quercus robur L.), growing in a reclaimed surface brown coal mine in the Czech Republic. The differences in the wood density of the aforementioned species, including the impact of position in the trunk, were examined. The impact of annual ring width and the proportion of latewood on density were also evaluated. The density of Q. robur wood reached 707 kg·m -3 , which was significantly higher than that of the North American species, which reached 654 kg·m -3 . Moreover, in the radial direction, the density increased in the direction from the pith toward the bark for both Q. rubra, and Q. robur. In the vertical direction, the density reached its highest value at the basal part of the trunk, but statistically, this assertion was only significant for Q. rubra. The effects of annual ring width and the proportion of latewood on density were shown to be statistically very low for both oak species.

Physical and mechanical properties of wood of northern red oak in the vicinity of Belgrade (Serbia)

“…The observed differences could be attributed to the different habitats and conditions in which the examined trees grew. Moreover, according to Zeidler and Borůvka (2016), the share of latewood is 68.80% to 90.40%, which is larger than the value obtained in our study (the average share of latewood is 69.673%). In addition, Uzcategui et al (2020) obtained the result that the average percentage of latewood of northern red oak varied between 42.20% and 98.40%, with a mean value of 71.30, and a coefficient of variation of 18.17%.…”

“…According to Šoškić et al (2005), the basic density of sessile oak is 665 kg/m 3 , and the basic density of pedunculate oak is 650 kg/m 3 , whereas the density of northern red oak is 740 kg/m 3 . In Zeidler and Borůvka (2016), the average density of northern red oak was similar to the value obtained in our study. The density of northern red oak in our study does not differ significantly from the density of sessile and pedunculate oak.…”

“…According to Zeidler and Borůvka (2016), the average ring width in northern red oak is 4.4 mm (range 2.8-7.1 mm). If we compare these data with the data obtained in our study for the 57 years old northern red oak tree (mean size of the growth ring is 3.486 mm, and the range is 0.438-9.379 mm), it can be noticed that the average ring width is smaller, but also that the variation in ring width is larger.…”

Aboveground biomass basic density of hardwoods tree species.

“…m -3 . Several authors state that the wood density varies not only by tree species but also with the vertical or radial location within the trunk or in the tree crown (Husch et al 2003, Tomczak and Jelonek 2013) followed by the annual rings width, the proportion of early and late wood, the tree age and the site on which the tree grows (Zeidler and Borůvka 2016, Schönfelder et al 2017, Jelonek et al 2009). Matovič and Šlezingerová (1992) state that wood from spruce branches has significantly higher density (570 kg .…”

Geographic Variations of the Wood Density and Fiber Dimensions of the Persian Oak Wood

“…Wood density is generally a complex variable and is related to many factors such as anatomical characteristics, e.g., vessel and fiber morphology, ecological site, moisture content and chemical constitutes [29,30]. In the present study, the density of Q. brantii is higher than that of Q. robur [31], Q. cerris [32] and Q. rubra L. [33]. However, oven-dry density values of Q. brantii evaluated for the Lordegan site in Iran (1.01 g/cm 3 , [25]) are significantly higher as compared to values of the Bazoft region in this study.…”