文献类型：期刊文献

中文题名：粤西地区西南桦优良无性系早期选择

英文题名：Early Selection of Superior Clones of Betula alnoides in Western Guangdong

作者：黎颖锋[1] 郭俊杰[2] 张栋[1] 王春胜[2] 邓炳权[1] 赵志刚[2] 曾杰[2]

第一作者：黎颖锋

机构：[1]广东省西江林业局西江林场;[2]中国林业科学研究院热带林业研究所

年份：2016

卷号：32

期号：5

起止页码：36-39

中文期刊名：林业与环境科学

外文期刊名：Forestry and Environmental Science

基金：国家"十二五"科技支撑专题"柚木黄檀西南桦新品种选育技术研究"(2012BAD01B0504)和"西南桦珍贵用材林定向培育技术研究"(2012BAD21B0102)

语种：中文

中文关键词：西南桦;干形;生长表现;相对排序法;优良无性系

外文关键词：Betula alnoides; stem form; growth performance; relative ranking system; superior clone

分类号：S722.33;S792.159

摘要：对粤西地区27个3 a生西南桦（Betula alnoides）无性系进行调查测定,分析其生长和干形因子的差异,应用相对排序法进行综合评价,进而初步筛选优良无性系。结果表明,27个西南桦无性系间胸径、树高、冠幅和干形等级均呈极显著差异（P〈0.01）,其均值分别为4.96 cm、4.32 m、2.58 m和1.78;4个性状的变异系数为18.86%~40.88%,重复力为0.08~0.24。通过综合评价筛选出FB2、A13、B1、Q2、Q4和FB4共6个生长较为迅速、树干通直且较为圆满的西南桦优良无性系,其胸径、树高和冠幅均值分别比群体均值高7.62%、8.08%和5.50%,其干形等级值低18.87%,这些无性系可在粤西、桂东等地区推广应用。
A total of 27 three-year-old clones of Betula alnoides planted in western Guangdong were studied. The growth performance and stem form of three-year-old B. alnoides were measured for preliminary selection of superior clones through the comprehensively evaluation by a relative ranking method. The results showed that there existed significant differences in diameter at breast height（DBH）, height（H）, crown diameter（CD） and stem form class（SF） among these clones（P0.01）, and their mean values were 4.96 cm, 4.32 m, 2.58 m and 1.78, respectively. The coefficients of variation ranged from 18.86% to 40.88%, and repeatability ranged from 0.08 to 0.24. The comprehensive evaluation based on a ranking system screened out 6 superior clones（FB2, A13, B1, Q2, Q4 and FB4） with relatively better performance in growth rate, stem straightness and fullness. Their DBH, H, CD and SF were improved by 7.62%, 8.08%, 5.50% and 18.87%, respectively, when compared with the total population. The selected clones could be promoted and applied in west of Guangdong and east of Guangxi.