巨桉无性系间生长性状、材性变异规律及优良无性系选择  

Studies on Variation of Growth Traits and Wood Properties of Clones of Eucalyptus grandis and Selection of Preponderant Clones

作　　者：吴义强[1] 罗建举[2] 

机构地区：[1]中南林学院工业学院,中国湖南株洲412006 [2]国家林业局桉树研究中心,中国广东湛江524022

出　　处：《中南林学院学报》2000年第3期42-48,共7页Journal of Central South Forestry University

基　　金：国家"九五"攻关! ( 96-0 11-0 1-0 3 )专题"桉树纸浆用材树种良种选育及栽培技术研究"部分内容

摘　　要：巨桉是我国目前最重要的纸浆用材树种之一 .为揭示其无性系间的生长和材性指标的变异规律 ,为桉树的林木改良、定向培育及合理高效利用提供理论指导和参考依据 ,对广西东门林场巨桉 8个无性系生长和材性指标进行了全面测定 ,用数理统计方法 ,对所测数据进行了分析比较 ,同时用综合评选法筛选优良无性系 .结果表明 ,巨桉 8个无性系间的主要生长性状和材性差异均达到极显著水平 ( 1% ) ,无性系间同一解剖指标平均值的径向变异趋势基本相同 ,变异规律与无性系内株间的相似 ;初步筛选出 G5 0和 G5 2为巨桉的两个优良无性系 .同时也强调了今后在进行林木改良时 ,要兼顾生长和材性两方面指标 ,既要重视无性系间变异 。Eucalyptus grandis W.Hill ex Maid is one of the most important tree species used to produce pulp wood in China.To reveal the variation in growth and wood traits of E. grandis and to provide certain scientific bases and references for the oriented cultivation,tree improvement and reasonable and effective utilization of Eucalyptus pulpwood , the indexes of the major growth traits and wood properties of 8 E. grandis clones in Guangxi Dongmen Forest Farm have been determined and the data obtained was analyzed and compared systematically by means of mathematical statistics. meanwhile, preponderant clones were chosen by comprehensively valuing method. The results indicated that there were significant differences(1%) for growth traits and wood properties among 8 E. grandis clones. Along radial direction, the same anatomical index among clones appeared to have approximate tendency, with the same rule in within tree within clones.G50 and G52 were selected out as preponderant clones of E. grandis . And the emphasis was also put on growth traits and wood properties in forest tree improvement in the future, neither the variation among clones nor that within one clone should be neglected.

关 键 词：巨桉 生长性状 无性系筛选 材性变异 

分 类 号：S792.39[农业科学—林木遗传育种] S781[农业科学—林学]