Variation in Wood Properties of Hybrid Poplar Lumber by Radial and Vertical Position in Stem: A Case Study from Boardman, Oregon

IF 0.8 4区工程技术 Q3 FORESTRY

Wood and Fiber Science Pub Date : 2021-08-11 DOI:10.22382/wfs-2021-17

A. Himes, S. Leavengood, A. Polinko

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引用次数: 1

Abstract

Understanding of wood quality of hybrid poplar is critically important for manufacturers who want to know the suitability of the wood for specific products. To this end, lumber was milled from the merchantable stem of four hybrid poplar clones ages 10-11 yr., grown at single site near Boardman, OR. The vertical and radial position in the stem were recorded for each board and the boards were kiln dried, surfaced, and samples from each board tested to determine specific gravity (SG), dimensional stability, hardness, screw withdrawal, and bending strength and stiffness (modulus of rupture [MOR] and modulus of elasticity [MOE], respectively) from small clear specimens. Results show differences in wood properties relative to vertical and radial position in the stem. SG, hardness, screw withdrawal, and bending properties of lumber samples generally increased with height in tree. Tangential hardness, SG, and MOR varied significantly between different sides of the trees corresponding to predominant wind in the area. Boards milled from the center of the stem had lower MOE and MOR than boards milled from nearer the bark. The results of this study may be used to target specific stem locations for different end uses.

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杂交杨木木材的木材特性随树干径向和垂直位置的变化——以俄勒冈州Boardman为例

了解杂交杨树的木材质量对于想要了解木材是否适合特定产品的制造商来说至关重要。为此，木材是从四个10-11岁的杂交杨无性系的可销售树干上研磨而成的，这些无性系生长在俄勒冈州Boardman附近的一个地点。记录每块木板的垂直和径向位置，并对木板进行窑干、表面处理，并对每块木板的样品进行测试，以确定小透明样品的比重（SG）、尺寸稳定性、硬度、螺钉拔出度以及弯曲强度和刚度（分别为断裂模量[MOR]和弹性模量[MOE]）。结果显示，木材的特性与树干的垂直和径向位置存在差异。木材样品的SG、硬度、螺钉拔出度和弯曲性能通常随着树的高度而增加。切向硬度、SG和MOR在与该地区主导风相对应的树木不同侧面之间变化显著。从树干中心研磨的木板比从更靠近树皮的地方研磨的木板具有更低的MOE和MOR。这项研究的结果可用于针对不同最终用途的特定阀杆位置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Wood and Fiber Science 工程技术-材料科学：纺织

CiteScore

7.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： W&FS SCIENTIFIC ARTICLES INCLUDE THESE TOPIC AREAS: -Wood and Lignocellulosic Materials- Biomaterials- Timber Structures and Engineering- Biology- Nano-technology- Natural Fiber Composites- Timber Treatment and Harvesting- Botany- Mycology- Adhesives and Bioresins- Business Management and Marketing- Operations Research. SWST members have access to all full-text electronic versions of current and past Wood and Fiber Science issues.