摘要
相对干率是一种新的干形表示方法，用此方法表示泡桐的干形，可使真实的树干转化为统一标准的圆柱体，并能够排列在一张图上实现直观图示。本文着重分析研究了７个泡桐种、无性系及其以桐杂一号为代表分别在不同生长阶段的干形差异，并且找出了材积结构的动态变化规律．首次提出用Ｘ０．９值简捷有效地分析评价泡桐干形优劣的方法。
The relative stem ratio is a new method to show stem form.It can turn concerte stems into the standard cylinder which may be arranged on a diagram to make direct illustration possibly.This article chiefly studied and analysed the stem form difference of7Paulownia varieties or clones on the different developing stages by taking Paulownia hybrid No.1 as representive,found out the dynamic variation law of structure of stem volume,primarily proposed analysing and evaluatin values various stem forms simply and effectively by application of No.9 sizes.
出处
《陕西林业科技》
北大核心
1995年第4期45-47,59,共4页
Shaanxi Forest Science and Technology
关键词
泡桐
相对干率
干形
材积结构
Paulownia
Relative stem ratio
Stem form
Structure of stem volume
