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首页> 外文期刊>Journal of Forest Planning >Wood Density in Relation to Growth Rate and Tissue Proportions of Teak Grown in Bangladesh
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Wood Density in Relation to Growth Rate and Tissue Proportions of Teak Grown in Bangladesh

机译：孟加拉国种植的柚木木材密度与生长速率和组织比例的关系

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摘要

To make fundamental information regarding wood quality for forest planning of teak (Tectona grandis L.), the variation of wood density, a reliable index of wood quality, were investigated. Six teak trees were sampled from two districts, Sylhet and Rangamati in Bangladesh. Wood density was measured by soft X-ray densitometry. Wood density remained more or less constant from pith to bark within individual trees, but varied between the two sites. Tissue proportions (Fiber, vessel, parenchyma and ray) varied conspicuously in narrower rings but were more stable in rings wider than 2mm. Vessel proportion was negatively and ray proportion was positively correlated with wood density. Ray proportions are considered to be tree specific and under genetic control. When planning to produce quality teak of higher wood density, proper site selection is the first and most important step. From the standpoint of uniformity and higher wood density, it is advisable to grow teak maintaining the ring width above 2mm andselecting trees with higher ray proportions for improving wood density. In teak, the differences in wood density between juvenile wood and mature wood were small. It is estimated that wood density is not affected by initial radial growth, consequently not affected by initial spacing.
机译：为了提供有关柚木（Tectona grandis L.）森林规划的木材质量的基本信息，调查了木材密度的变化（木材质量的可靠指标）。从孟加拉国的锡尔赫特（Sylhet）和兰加马蒂（Rangamati）两个地区采样了六棵柚木树。木材密度通过软X射线光密度法测量。在不同的树木中，从髓到树皮的木材密度或多或少保持恒定，但在这两个位置之间变化很大。在较窄的环中，组织比例（纤维，血管，薄壁组织和射线）显着变化，但在大于2mm的环中，组织比例更稳定。血管比例与木材密度成负相关，射线比例与木材密度成正相关。射线比例被认为是树木特有的，并处于遗传控制之下。当计划生产更高木材密度的优质柚木时，正确的选址是第一步也是最重要的一步。从均匀性和较高的木材密度的角度来看，建议种植柚木以保持环宽在2mm以上，并选择具有较高射线比例的树木以提高木材密度。在柚木中，幼木和成熟木之间的木材密度差异很小。据估计，木材密度不受初始径向生长的影响，因此不受初始间距的影响。

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