摘要
采用5株优势木对比法,在广西喀斯特地区任豆7个主要分布县开展人工林优树选择研究,初选任豆候选优树60株,优势木300株。运用t检验进行统计分析,确定了任豆人工林优树综合评价标准:胸径≥5株优势木平均胸径的1.22倍,树高≥5株优势木平均树高的1.13倍,单株材积≥5株优势木平均单株材积的1.63倍,且形质指标(干形+自然整枝能力+分枝)综合得分≥8.0分。符合该标准的任豆候选优树共有19株,入选率32%。该标准适用于广西喀斯特地区任豆人工林用材型优树选择。
Five-dominant-tree comparison was applied to the selection of Zenia irtsignis plus-tree from plantations of seven counties with karst landscape, Guangxi. Initially 60 candidate and 300 dominant trees were selected. T-test was used to de-termine the plus-tree selection criteria ： candidate DBH ≥ 1.22 times of average DBH of 5 dominant trees, candidate height ≥ 1.13 times of average height of 5 dominant trees, the tree volume ≥ 1. 63 times of average volume of 5 dominant trees, and stem form score≥8.0. The results showed that 19 candidate trees, which accounted for 32% of the candidates, met the above requirements. These criteria are suitable for Zenia insignis plus-timber tree selection in karst areas of Guangxi.
出处
《林业科技开发》
北大核心
2013年第6期14-17,共4页
China Forestry Science and Technology
基金
国家发改委重大项目"广西主要珍贵树种种质资源收集库建设项目"(编号:桂发改农金[2010]599号)
广西林业科技项目"桂西南石漠化治理树种选择及复合栽培研究"(编号:桂林科字[2012]3号)
关键词
任豆
人工林
优树选择
评价标准
Zenia insignis
plantation
plus-tree selection
evaluation standard
