High-resolution analysis of radial growth and wood density in Eucalyptus nitens, grown under different irrigation regimes
High-resolution analysis of radial growth and wood density in Eucalyptus nitens, grown under different irrigation regimes
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不同灌溉条件下生长的黑桉树径向生长和木材密度的高分辨率分析
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
R. Evans
中科院分区：
文献类型：
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作者：
R. Wimmer;G. Downes;R. Evans
木材密度是决定木材质量的最重要因素，也是短轮伐期林业的关键因素。在塔斯马尼亚岛东南部的一个2公顷种植园上，采用点式测树仪，在不同的灌溉制度下，对6年生亮叶桉（Eucalyptusnitens）的日径向生长进行了监测。在第二个生长季节结束时，从树木中提取12毫米的芯，并使用SilviScan-2进行高分辨率木材密度处理。测树仪的测量被用来在时间轴上重新标度木材密度。一般而言，生长季早期形成较低的密度，后期形成较高的木材密度。水旱处理的木材密度与土壤水分亏缺之间存在明显的相关性，木材密度随水分亏缺的解除而降低。密度的下降伴随着日增长的加速。采用所提出的方法，年度水平不再是分析的基础。这为树木的基因型×环境相互作用研究提供了新的机会，这在克隆林业中特别重要。
Wood density is the most important determinant of wood quality and a critical factor in short rotation forestry. Daily radial growth of six-year-old Eucalyptus nitens trees were monitored on a two hectare plantation in south-eastern Tasmania using point dendrometers, under dif- ferent irrigation regimes. At the end of the second growing season 12-mm cores were extracted from the trees and processed for high-resolution wood density using SilviScan-2. The dendrometer measurements were utilized to rescale wood density on a time axis. In general, lower density was formed early in the growing season, and higher wood density later. The irrigated-droughted trees showed an obvious relationship between wood density and soil water deficits with the density decreasing in response to water stress releases. The density decrease was accompanied by acceleration in daily increment. With the presented approach the annual level is no longer the basis of analysis. This opens new opportunities for genotype × environmental interaction studies of trees, which is of particular importance in clonal forestry.