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北方天然次生林主要阔叶树种树冠建模及应用

DOI: 10.3969/j.jssn.1000-2006.2012.04.002, PP. 7-12

Keywords: 天然次生林,树冠轮廓,枝解析,树冠直径,着枝深度

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Abstract:

选择黑龙江省帽儿山林场天然次生林内176株10个阔叶树种的解析木,共收集了3401个枝条的详细数据,建立了一种树冠轮廓模型。分析发现,树冠的形状随着枝深度变化,在树冠上部、中部逐渐扩展,在下部收缩,每个树种呈现不同的曲线形式,天然次生林主要阔叶树种树冠模型可分为上中层和下层两部分建模,上中层模型为hrpca=a0+(a1)/(ln(rb))+(a2)/(ln(rb)2)+(a3)/(ln(rb)3),下层轮廓模型因种不同而有不同,即hrpcb,白桦=b00+(b1?(exp(b2)?ln(rb)-1))/(b3);hrpcb,黄菠萝=b0+b101?ln(rb)+b2?ln(rb)2;hrpcb,其他=b0+b101?ln(rb)+b22?ln(rb)2+b33?ln(rb)3。经过验证,所建立的树冠轮廓模型拟合和检验效果较好,相关系数都在0.97以上。

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