施肥对中龄马尾松木材主要物理性质和管胞形态的影响

Principal Physical Properties and Tracheid Forms of Masson Pine Wood Fertilized in Middle-Age

采用正交设计方差分析方法 ,研究了施肥对中龄马尾松木材主要物理性质和管胞形态的影响 .结果表明 :施肥有助于增加生长轮宽度 ,提高晚材率 ,但经正交设计方差分析差异不显著 .P肥使管胞宽度、腔径 ,尤其是径向腔径有所增加 ,但各处理间差异不显著 .因此 ,可以认为 :施肥对管胞形态影响不大 .施肥对木材基本密度的影响较复杂 ,似乎与肥料种类、施肥量 ,甚至与树干部位有关 ,P肥使下部木材基本密度显著增加 ,N、K肥对木材基本密度影响不大 .

The effects of N, P, K fertilization on the principal physical properties and tracheid forms of Masson pine wood of a middle aged plantation in Guangxi were studied by way of variance analysis of orthogonal design. The results show that the fertilization increases the growth ring width and proportion of late wood but the increase is not significant; and that although P fertilization can increase the tracheid width, lumen diameter and especially the tangent lumen diameter, the different treatments do not lead to significant difference. Therefore it can be acknowledged that fertilization does not affect tracheid forms much. The effect of fertilization on wood basic density is complex, for it is interrelated to the parts of tree, the amount and kinds of fertilization. P increases significantly the basic density of low parts of tree while N, K do not affect the basic density significantly.