云南松及其近缘种的木材构造与环境因子之间关系研究

Study on Relationships between Environmental Factors and Wood Structure of Pinus yunnanensis and Its Relative Species

【目的】研究了云南松木材结构多样性的变化规律并分析了其木材结构与环境因子之间的关系。【方法】以云南松(Pinus yunnanensis Franch.)为重点,以地盘松[P.Yunnanensis var.pygmaea(Hsüeh)Hsüeh]、细叶云南松(P.yunnanensis var.tenuifolia Cheng et Law)、高山松(P.densata Mast.)和思茅松[P.Kesiya var.langbianensis(A.Chev.)Gaussen]为对比材料,对其木材微观解剖构造进行分析。【结果】从滇东南-滇中-滇西北,云南松木材的结构特征值(生长轮宽度、管胞直径、管胞长度)随着纬度的增加出现减小的趋势,细叶云南松、地盘松和高山松的木材结构数量特征值比较接近,均小于云南松的木材结构特征值,思茅松的木材结构特征值最大。【结论】云南松种群不仅具有足够的当前适合度,而且具备更大的进化灵活性,进化潜力很大。

[ Objective ] In this paper, the variation law of wood structure diversity of Pinus yunnanensis was studied, and the relationship be-tween wood structure of Pinus yunnanensis and environmental faetors was analyzed. [ Method ] Using Pinus yunnanensis Franeh. , P. Yun-nanensls var. pygmaea （HsOeh） HsOeh, P. yunnanensis var. tenulfolia Cheng et Law, P. densata Mast. , and P. Kesiya var. langbianeruis（ A. Chev. ） Gaussen as the experimental materials, their wood microstructure were analyzed. [ Result ] The structural feature value of Pinusyunnanensis is decreased with the increase of latitude from Southeast, central, to Northwest Yunnan. The timber structural quantity featurevalues of P. yunnanetuis var. tenuifolia, P. yunnaneis var. pygmaea （Hstieh） HsOeh and P. densata Mas are close to each other, andtheir values are smaller than that of Pinus yunnaneris, of which, the timber structural quantity feature value of P. kesiya var. langbianensis（A. Chev. ） Gaussen is the biggest. [ Conclusion ] The populations of Pinus yunnanensis not only have high adaptability at present, but havegreat evolutionary flexibility and evolutionary potential.