Due to the increasing demand and consumption of structural wood and the continuous development of forest industries, plantations of fast-growing trees became important for sustainability of industrial wood raw material. Black alder tree (Alnus glutinosa L. Gaertner) is naturally fast grown tree in North of Turkey. The aim of this research was to determine radial variation of annual ring width and fiber diamensions in planted and natural stands of black alder. The observations were made in young (28 years of age) and in mature trees (38-88 years of age). Three of planted trees were cut from Meryemana-Yeniköy, three of natural alder trees were cut from Maçka-Yüzüncüyıl in Trabzon. From the breast height a disc was taken and determined the South and North side of them. For fiber dimensions wood blocks were taken along the radial direction at three positions (near the pith, middle and periphery). The statistical analyses on the mean differences of the measured variables performed by ANOVA (analysis of variance) at %5 probability. The mean annual ring width was 4.08 mm for planted alder, 1.86 mm for nature alder. There was a significant difference between planted and mature alder wood annual ring width. The mean values of fiber length were 1115.1 and 1119.43 µm; fiber diameter were 27.27 and 26.46 µm; fiber lumen width were 18.68 and 17.32 µm while the mean values for fiber double cell wall thickness were 8.59 and 9.14 µm for natural and planted black alder wood respectively. There was significant difference between section of disc (inner, middle, outer) for fiber dimensions. Fiber length, fiber diameter and double cell wall thickness of fiber increased with age for natural and planted black alder wood; however fiber lumen diameter decreased with age for natural trees.The results of this study provide for understanding the differences between planted and natural tree annual ring and fiber properties and encourage to determine the other wood properties.
Journal Section | İç Anadolu’da Ağaçlandırma Çalışmaları |
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Authors | |
Publication Date | December 14, 2016 |
Published in Issue | Year 2016 Volume: 12 Issue: 2 |
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