I-69杨年轮宽度和密度变异规律

以I-69杨木材为试样,运用树木年轮图像分析系统和树木年轮分析系统获取年轮宽度和年轮密度数据,并对组成成分径向变异和轴向变异规律进行了分析.结果表明:I-69杨木材密度的径向变异规律随树龄增加而增大,最大密度波动较大,最小密度随树龄增加总体趋势下降,早材密度、晚材密度随树龄增加而增加；年轮组成成分各项指标株内径向变异极...

Studies on Variation of Poplar I-69 Tree-ring Width and Tree-ring Density

Poplar I-69 wood was chosen as the sample, the data of the components of tree-ring width and density were accessed by Tree-Ring Image Analysis System and Tree-Ring Analysis System and the radial and axial variations of the components were analyzed. The results showed that: the radial variation of the density of poplar I-69 increased along with the tree age. The maximum density fluctuated heavy, the minimum density decreased along with increase of the tree age on the whole. The density of earlywood and latewood increased along with the tree age. The radial variation of the tree-ring components was significant within individual trunk, but no difference among trunks. The components of the tree-ring density increased along with the tree height, there into, the tree-ring average density, earlywood density and minimum density increased less, while the tree-ring maximum density and latewood density increased more. Comparatively, the radial variation of the density of poplar I-69 was larger than that of the axial variation.