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作 者 ：吴承祯 吴继林

期 刊 ：西北植物学报 2001年 1期

关键词：长苞铁杉；伴生树种；竞争关系；群落；种间竞争；

Keywords:Tsuga longibracteata, associated species, competitive relationsh,

摘 要 ：以长苞铁杉及其伴生树种在正常纯林和伴生树种为优势种组成的阔叶林中的优势度为环境容纳量，用重要值百分数求取种间竞争系数，采用Ｌotka-Volterra竞争方程研究长苞铁杉林的共优种群（长苞铁杉与其伴生树种）种间竞争关系，结果表明，平衡时，长苞铁杉及其伴生树上对优势度分别为７４．２２％和２５．７８％，说明长苞铁杉种群支配整个群落。

Abstract:In this paper,the percentages of important value of Tsuga longibracteata and its associated species are regarded as the measure of the competitive parameter,and the dominant degree of normal stands are regarded as their environmental capacity.The fina

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