板栗木材密度和直径生长的研究

本文通过对板栗木材密度与年轮宽度的研究表明，板栗木材年轮宽度较窄，为０．２１ｃｍ，近髓心宽度较大，后期呈较平衡的下降趋势；年轮密度从髓心向外一直呈逐渐下降趋势；平均木密度为０．６１６４ｇ／ｃｍ＾３，最大密度为０．７７８５ｇ／ｃｍ＾３，最小密度为０．３７７４ｇ／ｃｍ＾２，早材密度０．４８３５ｇ／ｃｍ＾３，晚材密度０．６８２１ｇ／ｃｍ＾２，变异幅度０．４３９，密度梯度２３．６９７８，木材面向密度为０．

Wood Density and Diameter Growth in Chinese Chestnut

The annual ring of Chinese chestnut, Castanea mollissima, is as narrow as 0.21 cm. Although the breadth near the pith is big, it becomes steadily smaller with the tree age. The ring density decreases gradually from the pith outward. The wood density ranges from 0.7785g/cm 3 to 0.3774g/cm 3, with the mean value being 0.6164g/cm 3. The density of early wood is 0.4835g/cm 3, while that of the late wood is 0.6821g/cm 3. The variation is 0.439, and the density gradient 23.6978. The wood area density is 0.6301g/cm 3. All these indicate that the wood of Chinese chestnut is among the collection of national good commercial varieties.