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Investigation of the material resistance and moisture performance of pubescent oak (Quercus pubescens)
Holzforschung ( IF 2.4 ) Pub Date : 2020-07-31 , DOI: 10.1515/hf-2020-0045
Miha Humar 1 , Angela Balzano 1 , Samo Grbec 1 , Jožica Gričar 2 , Davor Kržišnik 1 , Boštjan Lesar 1 , Viljem Vek 1
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Abstract Forests are under great pressure due to climate changes. It is forecast that the importance of Mediterranean type forests will significantly increase. Among various types of oak species, pubescent oak (Quercus pubescens) will likely gain ecological and economic importance in the region south of Alps. Although this wood species is well known, there are not much data available about chemical properties and durability. A comprehensive analysis of extractives and durability against wood decay fungi was therefore performed. The results of the chemical analysis revealed that heartwood contains up to 20% of the extractives, with considerable amounts of phenols, including a fairly high concentration of Gallic acid (GAc). Anatomical structure, with high frequency of tylosis, resulted in good water exclusion efficacy. The presence of biologically active extractives and superior water exclusion efficacy resulted in good durability, as shown by basidiomycetes tests. Based on the laboratory data, factors that determine the service life of wood were calculated. Data indicate superior performance in above-ground applications.

中文翻译:

短毛橡木(Quercus pubescens)的材料抗湿性能研究

摘要 由于气候变化,森林承受着巨大的压力。预计地中海型森林的重要性将显着增加。在各种类型的橡树树种中,青春期橡树 (Quercus pubescens) 可能在阿尔卑斯山以南地区获得生态和经济重要性。尽管这种木材种类广为人知,但关于化学特性和耐久性的数据并不多。因此,对木材腐烂真菌的提取物和耐久性进行了综合分析。化学分析结果表明,心材含有高达 20% 的提取物,以及大量酚类,包括相当高浓度的没食子酸 (GAc)。解剖结构, tylosis 频率高, 导致良好的水排除效果。如担子菌测试所示,生物活性提取物的存在和卓越的水排除功效导致了良好的耐用性。根据实验室数据,计算出决定木材使用寿命的因素。数据表明在地上应用中的卓越性能。
更新日期:2020-07-31
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