不同初植密度对巨桉木材纤维形态的影响

Effects of Planting Density on Fiber Configuration of Eucalyptus grandis

对不同初植密度(2.0m×4.0m、3.0m×3.0m、3.0m×4.0m)20年生巨桉胸径处外缘材纤维形态特征(纤维长度、宽度、壁厚、腔径、长宽比和壁腔比)进行测定和分析,旨在为定向培育巨桉人工林提供基础数据。研究结果表明:随初植密度的增大,纤维长度、宽度、壁厚、腔径先增大后减小,以3.0m×3.0m的最大;纤维长宽比和壁腔比先减小后增大,3.0m×4.0m的纤维长宽比和壁腔比最大。本研究认为3.0m×3.0m的纤维形态特征为最好。

The determination and analysis of the fiber morphology of E.grandis marginal wood in diameter at breast high about 20-year-old in different planting density （2.0 m×4.0 m,3.0 m×3.0 m,3.0 m×4.0 m）were performed to make a reference to plantation orientation of E.grandis. The results showed： the fiber length, width, thickness and lumen diameter increased first and then decreased with the planting density increase, 3.0 m × 3.0 m planting density had the best values. The ratio of length to width and the ratio of cell-wall thickness to lumen diameter decreased first and then increased. The ratio of length to width and the ratio of cell-wall thickness to lumen diameter in planting density of 3.0 m × 4.0 m were larger than in the others. This study concluded that 3.0 m×3.0 m was the best planting density for the fiber morphology.