白榆优良无性系木材物理力学性质的主成分分析

THE PRINCIPAL COMPONENT ANALYSIS ON THE PHYSICAL AND STRENGTH PROPERTIES OF ULMUS PUMILA CLONES WOOD

以１４个白榆优良无性系木材物理力学性质测试数据为研究材料，采用主成分分析方法，将影响白榆木材物理力学性质的１２个指标分为强度指标和干缩指标两大主成分。讨论了年轮宽度与木材强度性能和干缩性能的关系。同时对前两个主成分坐标值采用排序聚类，将１４个无性系划分为３类。因而对白榆的选种育种及工业用材的定向培育生产具有指导意义。

The paper is based on the test data from the physical and strength properties of 14 Ulmus Pumila clones. With principal component analysis,12 factors of affecting the wood physical and strength properties are divided into two classes——strength index,shrinkage index. Whether annual ring width markedly affects both strength properties and shrinkage properties of the wood is discussed. With arrange cluster, 14 clones of Ulmus Pumila are divided into three classes, which is good for the directive practice of the seed selection and directive breeding for Ulmus Pumula.