引用本文:赵园园, 王海洋.重庆市园林树木生长特征及其对生境响应[J].西南大学学报(自然科学版),2019,41(11):7~18
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重庆市园林树木生长特征及其对生境响应
赵园园, 王海洋
西南大学 园艺园林学院, 重庆 400716
摘要:
以重庆主城区14种木本植物为对象,在15个采样地点中,采集并测量当年生枝条、花枝和果枝的茎、叶、花和果实性状,同时实地测量采样地点的环境因子,定量分析了功能性状的差异性、环境因子的影响及生境类型和功能群对功能性状的综合影响.结果表明:①除茎密度、比叶面积外,茎干质量、茎截面积、单叶面积和单叶干质量在不同物种间差异极具有统计学意义(p<0.01);②开花习性对性状差异影响具有统计学意义(p<0.05),而生活型和生长型类型因性状和枝条而异,如不同生活型间功能性状在当年生枝条上差异不具有统计学意义,而花枝和果枝的茎干质量和单叶面积差异具有统计学意义(p<0.05);③除比叶面积、花枝的单叶面积和单叶干质量外,其余功能性状在不同生境差异具有统计学意义(p<0.05),其中温度、硬质铺装占比及PM 2.5对于茎干质量、单叶面积、单叶干质量、花干质量和果实干质量呈负相关关系,而与茎密度、比叶面积正相关;④发育阶段对性状的影响具有统计学意义(p<0.05),除比叶面积外,其他性状随新-花-果梯度变化逐渐增大.
关键词:  重庆主城  性状差异  功能群  生境类型  发育阶段
DOI:10.13718/j.cnki.xdzk.2019.11.002
分类号:S688.9
基金项目:重庆市技术创新与应用示范项目(cstc2018jscx-mszdX0069).
Functional Trait Variation and Its Relationship with Different Habitats of Woody Plants in Chongqing
ZHAO Yuan-yuan, WANG Hai-yang
School of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China
Abstract:
As a bridge linking plant, environment and ecosystem, functional trait variation is of great significance to examine the adaptation strategies of plants to urban ecological environment. In this study, we studied stem, leaf, flower and fruit characters of annual, flower and fruit branches in 14 woody plants from 15 sample sites in Chongqing. The results shows:1) Functional traits, including stem mass (SM), twig cross sectional area (TCSA), individual leaf area (ILA) and individual leaf mass (ILM) are significantly differentiating among different species except twig density (TD) and specific leaf area (SLA). 2) Flowering habit had a significant effect on the functional trait variation, while life form and growth form for functional trait variation varied from functional trait to branch. For example, the functional traits of different life forms had no significant difference on the annual branches, but the stem mass (SM), twig cross sectional area (TCSA) and individual leaf area (ILA) of flower and fruit branches were significantly differentiating. 3) Except for specific leaf area (SLA), individual leaf area (ILA) and individual leaf mass (ILM) of flower branches, other functional traits were significantly differentiating and their values decreased as well with the country-suburban-urban environmental gradient. Temperature, Building area ratio and PM 2.5 are negatively correlated with stem mass (SM), individual leaf area (ILA), individual leaf mass (ILM), flower mass (FLM) and fruit mass (FM), but positively correlated with stem density (SM) and specific leaf area (SLA). 4) Stem and leaf functional traits were significantly differentiating and their values increased as well with the new-flower-fruit gradient except the specific leaf area (SLA).
Key words:  Chongqing urban city  trait variation  functional group  habitat type  developmental stage
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