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OALib Journal期刊
ISSN: 2333-9721
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祁连山北坡自然恢复杨桦林地植物功能型组成及其影响因素
DOI: 10.3724/SP.J.1145.2012.00546, PP. 546-552
Keywords: 植物功能型,生活型,生态型,cca,环境因子,山杨,白桦,祁连山地
Abstract:
依据生活型（乔木、藤本、灌木、半灌木、多年生禾草、多年生杂类草和一二年生草本）和水分生态型（旱生、旱中生、中生和湿生）将祁连山北坡次生杨桦林28个调查样地中的81个物种划分为18种植物功能型（plantfunctiontypes，pfts），并通过典范对应分析（cca）方法研究植物功能型与环境因子间的关系.结果表明：自然恢复杨桦林地植物功能型主要集中在中生多年生杂类草（pfts16）、湿生多年生杂类草（pfts23）、旱中生多年生杂类草（pfts9）和中生灌木（pfts18）4个植物功能型上；乔、灌、草三层冠层特征和中生植物的大量出现，反映了群落植物生活型趋于复杂化和结构化，生态型逐渐向中生化方向演替的特点；土壤容重、有机碳和全氮含量主要影响植物的生活型分异特征，土壤含水量和林冠郁闭度是植物的水分生态型分异的主要环境因子，而坡位、坡度控制着群落植物总体分布格局的形成.图1表3参31
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