6年生大花序桉不同种源木材纤维特性的差异分析

Genetic Variation in Fiber Characteristics of 9 Provenances of Eucalyptus cloeziana

以广西钦廉林场6年生9个种源的大花序桉为材料,通过解析木法,测量其木材的纤维长度、纤维宽度、纤维腔径,比较9个种源6年生大花序桉的木材纤维特性。结果表明,种源间纤维长度、宽度、长宽比存在显著差异;种源的纤维形态(宽度除外)与树高、胸径生长性状相关关系不显著,据此可对各性状进行独立选择,可望培育出木材性状好又速生的种源;树高、纤维宽度与种源地的经纬度因子存在显著的相关性;9个大花序桉种源作为中大径材培育有更大的发展空间。

This study aimed to test and analyze wood fiber characteristics of 6-year old Eucalyptus cloeziana with 9 provenances planted in Guangxi Qinlian Forest Farm. The results showed that fiber length, width and ratio of length to width had significant differences among different provenances. Fiber morphological characteristics, exclu- ding fiber width, had no significant correlations with tree height and DBH. This indicates that growth and fiber characteristics can be selected separately, and trees with fast growth and good fiber quality could be cultivated. Tree height and fiber width were significantly correlated with latitude and longitude factors, but weakly correlated with precipitation and elevation of regions where the provenances were from. These 9 Eucalyptus cloeziana have great potential in cultivation for medium- to large-diameter logs.