陕西省8种树种干形的差异分析

Discriminatory Analysis of Stem Forms of Eight Main Tree Species in Shaanxi Province

根据相对干形的方法，研究了陕西省８种主要树种的干形（带皮）的异同点，并初步分析了各树种的干形与其生物学特性的关系。提出各树种的干形（带皮）存在着显著的差异，又以油松和华山松、白桦与刺槐、红桦与山杨的差异性为最小，说明它们的一些生物学特性比较接近。分析了引起干形差异的生物学因子─喜光性与深浅根性。

The differences of stem forms of & main tree species in Shaanxi were approached withanalysis of the relation of stem forms to the biological characteristice of the species according tothe 'relative stem form theory Yhe resullts showed that the differences of stem forms are significant, But the differences between PI';lus tabulaefdrilk and P. a￣andi, between Betule PlatyPllylla and Rod,';lia pseudoucacia, between Betula alal--st;Jesis and Populus davidfona, are rathersmaller, which indicates their similar biological characteristics in pairs, respectively. Finally, thebiological factors causing the differences of stem forms such as lighe -- demard or shade -- endurance, deep-- rootedness or shallow-- rootedness were determined.