尾叶桉U6无性系萌芽性能研究  

Coppice Performance of Eucalyptus urophylla clone U6

作　　者：陈少雄[1,2] 李天会[2] 李志辉[1] 谢耀坚[2] 刘素青[3] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]国家林业局桉树研究开发中心,广东湛江524022 [3]广东海洋大学,广东湛江524088

出　　处：《林业科学研究》2009年第5期657-661,共5页Forest Research

基　　金：国家"十一五"科技支撑课题:桉树和相思速生丰产林培育关键技术研究与示范(2006BAD24B02);国家"十一五"科技支撑课题:速生纸浆林可持续经营管理技术研究与示范;国家"十一五"科技支撑课题:优良能源树种丛生桉选育技术引进(2007-4-12)等的部分内容

摘　　要：尾叶桉U6是南方分布最广的桉树无性系之一。研究表明,3个月生的U6的萌芽点、萌芽条数和萌芽高度均服从W eibull分布,峰度均大于3,比正态分布的峰值高;偏度大于0,呈不对称分布,数据均值右侧的离散性比左侧的强。萌芽点数按伐桩高度和伐桩直径分布均呈随机性,表明萌芽点数与伐桩高度和伐桩直径无关,仅与其生物学特性有关。萌芽条数受伐桩直径和高度的影响,伐桩直径越大,萌芽条数越多,呈线性关系;当伐桩高度低于16 cm时,萌芽条数随伐桩高度的增加而增加,超过16 cm高度后随之减少,呈三次抛物型。萌芽条高度与伐桩高度有关,当伐桩高度低于12 cm时,萌芽高度随伐桩高度的增加而增加,到12 cm以后随之减少;萌芽条高度与伐桩直径呈负相关。Eucalyptus urophylla clone U6 was one of the most common eucalypt clone planted in Southern China. The results showed that the number of sprout spot, coppice number and height at the age of 2 months fellowed the Weibull distribution, the kurtosis was over 3, higher than normal school, the skewness over 0, as an anisomerous distribution. The number of sprout spot was related with biological features but not related with height and diameter of stumps as it changed with randomicity. Coppice number affected by height and diameter of stumps. The bigger the diameter, the more the coppice number, it showed a linearity relationship. The coppice number increased with the height of stumps when the height was under 16 cm, it would decrease when the height was over 16 cm, it followed a thrice parabola. The coppice height was affected by the height of stumps, it increased when stump height was under 12 cm, then decreased while over 12 cm; The coppice height was negatively related by stump diameter.

关 键 词：尾叶桉U6 萌芽性能 WEIBULL分布 伐桩 

分 类 号：S792.39[农业科学—林木遗传育种]