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基于结构方程模型的林木竞争指标研究

王妍 杨华 李艳丽 邱实

王妍, 杨华, 李艳丽, 邱实. 基于结构方程模型的林木竞争指标研究[J]. 北京林业大学学报, 2015, 37(4): 28-37. doi: DOI:10.13332/j.1000-1522.20140075
引用本文: 王妍, 杨华, 李艳丽, 邱实. 基于结构方程模型的林木竞争指标研究[J]. 北京林业大学学报, 2015, 37(4): 28-37. doi: DOI:10.13332/j.1000-1522.20140075
WANG Yan, YANG Hua, LI Yan-li, QIU Shi. Tree competition index based on the structural equation model[J]. Journal of Beijing Forestry University, 2015, 37(4): 28-37. doi: DOI:10.13332/j.1000-1522.20140075
Citation: WANG Yan, YANG Hua, LI Yan-li, QIU Shi. Tree competition index based on the structural equation model[J]. Journal of Beijing Forestry University, 2015, 37(4): 28-37. doi: DOI:10.13332/j.1000-1522.20140075

基于结构方程模型的林木竞争指标研究

doi: DOI:10.13332/j.1000-1522.20140075
基金项目: 

林业公益性行业科研专项(201104051)。

详细信息
    作者简介:

    第一作者: 王妍。主要研究方向:森林资源监测与评价。Email:wangyan_bjfu@163.com 地址:100083北京市清华东路35号北京林业大学林学院。责任作者: 杨华,博士,副教授。主要研究方向:森林可持续经营。Email:huayang8747@163.com 地址:同上。

    第一作者: 王妍。主要研究方向:森林资源监测与评价。Email:wangyan_bjfu@163.com 地址:100083北京市清华东路35号北京林业大学林学院。责任作者: 杨华,博士,副教授。主要研究方向:森林可持续经营。Email:huayang8747@163.com 地址:同上。

Tree competition index based on the structural equation model

  • 摘要: 为了研究竞争指标之间的关系,本文基于长白山林区云冷杉针阔混交林的典型样地数据,选取12个可测指标并分为3类,即林木距离指标(简单竞争指标、竞争指标ME、竞争指标A、竞争木株数控制指标)、林木树冠指标(生长空间指数、生长空间竞争指数、伸展度、圆满度、投影比)和林木相对大小指标(相对胸径、相对树高、相对冠幅)进行信度检验和效度分析,并通过构建结构方程模型从总体层面对这3类林木竞争指标进行评价。结果显示:林木距离竞争指标的变幅较大、离散程度适中且一致,在结构方程中具有较为一致的显著正相关影响效用,林木距离指标的信度和效度最高,表明内在一致性最强且能够最真实地反映林木竞争状况;林木树冠各竞争指标离散程度和影响度差异较大,信度和效度相对较低,表明冠幅竞争指标的一致性、反映林木竞争状况的真实性较低,而且受到林木距离指标的影响;林木相对大小各竞争指标的变幅、离散程度、影响效用、信度和效度的变化介于林木距离指标和林木树冠指标之间,而且受到林木距离指标和林木树冠指标的影响。由此可知,与林木距离有关的竞争指标较为稳定和可靠,与林木相对大小有关的竞争指标次之,与林木树冠有关的竞争指标波动性较大。

     

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  • 收稿日期:  2014-03-07
  • 修回日期:  2014-12-24
  • 刊出日期:  2015-04-30

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