造林密度对马尾松木材主要性质影响的研究

本文对贵州省龙里林场马尾松密度试验林 ,5种造林密度 ,15年生马尾松木材基本密度、生长轮宽度、晚材率和解剖特性进行研究。结果表明 :造林密度对马尾松生长轮宽度、晚材率和管胞列数影响较大 ,方差分析达到显著水平。造林密度大 ,则生长轮变窄 ,管胞列数减少 ,晚材率增加。造林密度对马尾松木材基本密度的影响不显著 ,但具明显的规律性 ,即随着造林密度加大木材基本密度增加 ,造林密度过大反而下降。造林密度对管胞形态的影响表现出因树龄而异 ,不同造林密度马尾松管胞形态总平均值变化不大 ,但管胞长度随树龄的增大而增加的趋势受到造林密度影响。较低的造林密度各生长轮管胞长度差异不显著。组织比量不受造林密度影响。

STUDY ON PLANTING DENSITY AFFECTING OF THE WOOD PROPERTIES OF MASSON PINE

This paper studied the wood basic density, growth ring width, proportion of late wood and anatomical features for 15 years Masson pine plantations with 5 different planting densities in Longli, Guizhou province. The results show that the planting densities greatly affect the growth ring width, proportion of late wood and tracheid row through variance analysis. As planting density increased, the growth ring width and tracheid row decreased but proportion of late wood increased. Although the effect of planting density on the wood basic density is not significant, but the regularity is obvious that wood basic density increased with the increasing of planting density, but decreased if it is too closed. The effect of planting densities on tracheid form vary with age. The chang of average value of tracheid form in different planting densities is not so great, but the tendency of the tracheid length's increasing with their age will be affected by its plangting density. Its has no significant if planting density is small. The proportions of tissues is not affcted by the planting density.