| 栲树不同生长发育阶段的枝系特征分析 |
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| 引用本文： | 陈波,达良俊.栲树不同生长发育阶段的枝系特征分析[J].武汉植物学研究,2003,21(3):226-231. |
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| 作者姓名： | 陈波 达良俊 |
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| 作者单位： | 1. 杭州师范学院生命科学学院,杭州,310036
2. 华东师范大学环境科学系,上海,200062 |
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| 基金项目： | 973项目“亚热带常绿阔叶林若干优势种的替代分布及其环境解释”( G2 0 0 0 4680 1)资助 |
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| 摘 要： | 对浙江天童国家森林公园内常绿阔叶优势树种栲树(Castanopsis fargesii)不同发育阶段植冠内的分枝式样特征进行了统计分析。结果表明：栲树在不同发育阶段的总体分枝率和逐步分枝率有显著变化，幼苗和幼树阶段的分枝率较低，而成株阶段的分枝率较高；幼树阶段的枝条长度、枝倾角和叶倾角明显大于幼苗和成株阶段，表现为明显的高生长对策；叶片配置在不同枝系上有较大差异，叶片主要集中于植冠内一级枝和二级枝上；叶片的大小从幼苗、幼树到成株阶段逐渐增大。研究结果表明栲树在生活史的不同生长发育阶段，分枝式样表现出一定的可塑性，反映了不同的适应对策。
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| 关 键 词： | 天童国家森林公园 栲树 发育阶段 分枝式样 可塑性 |
| 文章编号： | 1000-470X(2003)03-0226-06 |
| 收稿时间： | 2002-8-28 |
| 修稿时间： | 2002-12-2 |
Branching Patterns of Castanopsis fargesii as Affected by Growth and Developmental Phases |
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| CHEN Bo,DA Liang-Jun.Branching Patterns of Castanopsis fargesii as Affected by Growth and Developmental Phases[J].Journal of Wuhan Botanical Research,2003,21(3):226-231. |
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| Authors: | CHEN Bo DA Liang-Jun |
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| Affiliation: | 1. School of Life Sciences, Hangzhou Normal College, Hangzhou 310036, China;2. Department of Environmental Science, East China Normal University, Shanghai 200062, China |
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| Abstract: | Castanopsis fargesii,an evergreen broad-leaved tree species,commonly dominates in subtropical forests in China.The branching patterns of C.fargesii in different growth and deve- lopmental phases located at Tiantong National Forest Park (TNFP),Zhejiang Province are exa- mined.The results show that bifurcation ratio vary significantly among C.fargesii seedling,sapling and mature phases.The bifurcation ratio in the seedling and sampling phases are significantly lower than that in the mature phase (P<0 05).The first-order branch length,branch angle to horizon and branch length in sampling phase are significantly different between seedling and mature phases,it is shown that samplings has relatively higher phenotypic plasticity.The leaves display also difference among three phases.The leaves are distributed at the first-order branch to the third-order branch,but most of them are distributed at the first-order and second-order branch in the three different phases.The leaf size increases with growth and development.The differences in branching patterns suggest that C.fargesii have different adaptive strategy during different growth and developmental phases. |
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| Keywords: | TNFP Castanopsis fargesii Growth and developmental phase Branching pattern Plasticity |
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