The Technical Quality of Wood of Scots Pine (<em>Pinus sylvestris </em>L.) of Diverse Genetic Origin

This work contains the preliminary results of research into the technical quality of the wood from Scots pine trees of diverse genetic origin, grown on an experimental plot at the Forest Experimental Station in Rogów. The following are the parent stands, numbered: 5 (the Tucholskie Forest 130 m a.s.l.), 7 (the Napiwodzko–Ramuckie Forest 145 m a.s.l.), 10 (the Piska Forest 145 m a.s.l.), 12 (the Biała Forest 95 m a.s.l.), 13 (the Namysłowsko–Ostrzeszowskie Forest 190 m a.s.l.), 15 (the Knyszyńska Forest 165 m a.s.l.), and 16 (the Nowotarskie Forest 590 m a.s.l.). The tested wood was obtained in 2018 from trees aged 52 years. The research material came from 100 trees in total. After felling, two logs approximately 0.5 m in length were cut from each tree. The height on the tree from which the material was taken ranged from breast height (1.3 m) to approximately 2.5 m. Next, planks were cut from the logs in a north–south direction; these were precisely described and then left to season. The work included the measurement and statistical analysis of one physical property, wood density (kg/m3), and of the following mechanical properties: compressive strength along the fibres, Rc12 (MPa); static bending strength, Rg12 (MPa); modulus of elasticity under static bending, Eg12 (MPa); and indices of strength quality of the tested mechanical properties, JRc12, JRg12, and JEg12 (km). The origin of the logs was shown to have a significant influence on wood density, compressive strength, static bending strength, and modulus of elasticity under static bending. The highest mean density was found for trees originating from stand 10 (537 kg/m3). The highest values of compressive strength were obtained for trees originating from stands 5 (45 MPa), and the highest static bending strength and modulus of elasticity under static bending were obtained for trees originating from stand 12 (102 and 9825 MPa, respectively).

Download Full-text

Are clearcut borders an effective tool for Scots pine (Pinus sylvestris L.) natural regeneration?

Forest Systems ◽

10.5424/fs/2018272-12408 ◽

2018 ◽

Vol 27 (2) ◽

pp. e010

Author(s):

Lukáš Bílek ◽

Zdeněk Vacek ◽

Stanislav Vacek ◽

Daniel Bulušek ◽

Rostislav Linda ◽

...

Keyword(s):

Pinus Sylvestris ◽

Scots Pine ◽

Natural Regeneration ◽

Pearson Correlation ◽

Pair Correlation ◽

Forest Edge ◽

Horizontal Structure ◽

Study Sites ◽

The Relationship

Aim of the study: To describe the effect of stand edge after clearcut on the process of Scots pine (Pinus sylvestris L.) natural regeneration along the edge-to-interior gradient. The density, height, horizontal structure and quality of natural regeneration was evaluated.Area of the study: Kokořínsko Protected Landscape Area, Northern Bohemia (Czech Republic). The study sites naturally host Scots pine Pinetum oligotrophicum with cover of Vaccinium myrtillus L. and Vaccinium vitis-idaea L. in the herbal storey.Material and methods: Two 40 × 40 m permanent research plots were situated at the forest edge, two adjacent plots were established within the forest stand as control plots. Differences in regeneration characteristics were tested by analysis of variance (ANOVA) followed by the Tukey HSD test. Interactions between regeneration characteristics and the distance from the edge were evaluated by Pearson correlation. The relationship between the top storey and natural regeneration was depicted by pair-correlation function. Principal components analysis was carried out to assess overall data structure.Main results: Generally, the further from the stand edge, the lower natural regeneration density (r ≤ -0.64, p<0.001), mean height (r ≤ -0.54, p<0.001) and the best-quality promising individuals (r = -0.40, p<0.05) were found, whereas significant influence on overall average pine quality was not observed. The highest regeneration density (15,250 pcs/ha) was reached at a distance of 5-10 m from the stand edge.Research highlights: The forest edge interior can become favourable location for natural regeneration and can be implemented into traditional regeneration approaches in pine regions.

Download Full-text

Influence of machining technologies and quality of logs on material losses of typical supply of Scots pine wood (Pinus sylvestris L.) destined for layered floorboards

Folia Forestalia Polonica ◽

10.2478/ffp-2018-0025 ◽

2018 ◽

Vol 60 (4) ◽

pp. 241-247 ◽

Cited By ~ 1

Author(s):

Paweł Kozakiewicz ◽

Bartłomiej Rębkowski ◽

Grzegorz Koczan ◽

Sławomir Krzosek

Keyword(s):

Pinus Sylvestris ◽

Scots Pine ◽

Solid Wood ◽

Point Of View ◽

Total Loss ◽

Pine Wood ◽

Flooring Material

Abstract Pine wood is commonly used in the production of floorings and is mainly used for solid wood planks and as a base in multi-layer flooring material. From an economic and ecological point of view, flaws such as flattening or heartwood ratio are very important when buying material for production. 40 logs of Scots pine (Pinus sylvestris L.) have been selected from wood deposit, from typical wood delivery. The ratios of sapwood and heartwood have been quantified, as well as eccentricity and flattening, in order to determine the suitability of the selected material for processing into floorings. There are two existing methods of log processing: sawing and peripheral cutting. Sawing is the most common one and widely used, although peripheral cutting could be more effective, especially for production of base in multi-layer floorings. The total loss volume for the two methods of manipulation and processing have been calculated. First one is sawing in accordance to schematics used in the sawmill of one of the largest producers of multilayer floorings in Europe. Second one is peripheral cutting with three diameters of peeler roll. Total loss volume for sawing was 55.8 ± 10.5% and for peripheral cutting with peeler roll with biggest chosen diameter of 100 mm was 45.6 ± 9.5%. Therefore, in presented case, peripheral cutting is more efficient than sawing.

Download Full-text

The influence of anthropogenic impact on the content of photosynthetic pigments in the annual conifer of Scots pine growing in the forest park zones of the city of Yelets

АгроЭкоИнфо ◽

10.51419/20211105 ◽

2021 ◽

Vol 1 (43) ◽

pp. 5-5

Author(s):

Alexander Saakian ◽

◽

Keyword(s):

Pinus Sylvestris ◽

Scots Pine ◽

Spectrophotometric Analysis ◽

Urban Environments ◽

Main Function ◽

Forest Park ◽

Forested Areas ◽

Negative Factors ◽

The City

Urban forested areas play an important role in maintaining a high quality of life in an urbanized society. They are assigned the main function in smoothing out negative factors of production and creating a favorable environmental environment. The growth and development of woody plants in urban environments often differs significantly from natural conditions. This factor is particularly acute in the work of the assimilation apparatus. The study of the content of pigments (chlorophylls a, b and carotenoids) in the annual conifer of scots pine (Pinus sylvestris L.) was determined in extracts using spectrophotometric analysis. As a result of the study, experimental data were obtained on changes in the pigment system in the coniferous pine needles with an increase in the level of contamination. The analysis of photosynthetic features of scots pine (Pinus sylvestris L.) in the studied forest park zones in the city of Yelets with a complex index of atmospheric pollution at the level of "low", showed minor differences in the sum Keywords: SCOTS PINE, CHLOROPHYLLS, CAROTENOIDS, INDUSTRIAL POLLUTION, LIPETSK REGION

Download Full-text