Selected physical and mechanical properties of Scots pine (Pinus sylvestris L.) wood from stands of younger age classes as criteria for rational utilization of timber

IF 0.7 4区农林科学 Q3 FORESTRY

Baltic Forestry Pub Date : 2021-03-12 DOI:10.46490/BF363

Przemysław Marcin Pikiński, J. Szaban, G. Šilingienė, R. Korzeniewicz, W. Pazdrowski

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引用次数: 1

Abstract

The aim of this study was to assess the quality of Scots pine (Pinus sylvestris L.) wood depending on the age of trees, forest site conditions and social class of tree position in the stand. Analyses were based on the determination of specific density and static bending strength, as well as the strength quality coefficient. It was to determine changes in physical and mechanical properties of timber depending on tree age as well as growth conditions reflected in the forest site such as fresh mixed coniferous forests and fresh mixed broadleaved forests. Experimental plots were established in 6 localities with 30, 40 and 60-year-old trees. In each of the stands, a 1-hectare experimental plot was established. Based on the measured DBH and tree height, dimensions of three mean sample trees were calculated, while the classification of social class of tree position in the stand developed by Kraft (1884) was also applied. Analyses were conducted on wood samples with 12% moisture content. Strength tests on wood samples were performed on an Instron 33RH204 universal strength testing machine. A detailed analysis showed properties of pine wood are improved with an increase of tree age in both forest sites. Statistically significant differences were observed for wood density and static bending strength. More advantageous properties were observed for wood of pines from the less fertile forest site, i.e., fresh mixed coniferous forests. Density and static bending strength were markedly determined by tree age and growth conditions. The static bending strength quality coefficient from pines growing in the fresh mixed coniferous forests increased between 30 and 40 years, similarly as it was for the fresh mixed broadleaved forests, while between 40 and 60 years, it deteriorated for the fresh mixed coniferous forests. Wood density from the fresh mixed coniferous forests was by 3% to 7% greater than pines growing in fresh mixed broadleaved forests. In turn, static bending strength of wood from pines growing in fresh mixed coniferous forests was by 4% to 10% greater than trees from the fresh mixed broadleaved forests. Keywords: Scots pine, wood properties, forest site, Poland

查看原文本刊更多论文

低龄层苏格兰松(Pinus sylvestris L.)木材的选择物理和机械性能作为木材合理利用的标准

本研究的目的是根据树龄、森林场地条件和林分中树木位置的社会等级来评估苏格兰松（Pinus sylvestris L.）木材的质量。分析基于比密度、静态抗弯强度以及强度质量系数的测定。这是为了确定木材物理和机械性能的变化，这取决于树龄以及反映在森林现场的生长条件，如新鲜混合针叶林和新鲜混合阔叶林。在6个地区建立了30、40和60年树龄的试验区。在每个林分中，都建立了一个1公顷的试验区。根据测量的DBH和树高，计算了三棵平均样本树的尺寸，同时也应用了Kraft（1884）提出的林分中树木位置的社会类别分类。对含水量为12%的木材样品进行了分析。在Instron 33RH204万能强度试验机上对木材样品进行强度试验。详细分析表明，随着树龄的增加，两个林分的松木性能都有所改善。木材密度和静态弯曲强度在统计学上存在显著差异。从贫瘠的森林地区，即新鲜的混合针叶林，观察到松树的木材具有更有利的特性。树龄和生长条件显著决定了密度和静态弯曲强度。生长在新鲜针叶林中的松树的静态抗弯强度质量系数在30至40年之间增加，与新鲜阔叶林相似，而在40至60年之间，新鲜针叶林的静态抗剪强度质量系数恶化。新鲜混合针叶林的木材密度比生长在新鲜混合阔叶林中的松树高出3%-7%。反过来，生长在新鲜针叶林中的松树木材的静态弯曲强度比生长在新鲜阔叶林中的树木高4%至10%。关键词：苏格兰松，木材特性，森林遗址，波兰

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来源期刊

Baltic Forestry 农林科学-林学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The journal welcomes the original articles as well as short reports, review papers on forestry and forest science throughout the Baltic Sea region and elsewhere in the area of boreal and temperate forests. The Baltic Sea region is rather unique through its intrinsic environment and distinguished geographical and social conditions. A temperate climate, transitional and continental, has influenced formation of the mixed coniferous and deciduous stands of high productivity and biological diversity. The forest science has been affected by the ideas from both the East and West. In 1995, Forest Research Institutes and Universities from Estonia, Latvia and Lithuania joined their efforts to publish BALTIC FORESTRY.