OALib Journal期刊
ISSN: 2333-9721
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阔叶红松林两种主要树种的生物量分配格局及异速生长模型
DOI: 10.3724/SP.J.1145.2013.00718, PP. 718-722
Keywords: 阔叶红松林,生物量,分配格局,异速生长模型,红松,紫椴,胸径
Abstract:
为了解阔叶红松林的生物量和碳储量,按照不同径级,采用全收获法对阔叶红松林主要针叶树红松和阔叶树紫椴的地上地下生物量进行分析.利用胸径(dbh)、树高(h)及胸径-树高(d2h)作为变量建立两个树种各器官生物量异速生长模型.结果表明:(1)11株红松的整株生物量变化范围为6.99-1165.30kg/株,叶、枝、干、根的生物量相对分配百分数分别为6.54%、18.33%、53.14%和21.99%.10株紫椴的整株生物量变化范围为10.83-1004.31kg/株,叶、枝、干、根的生物量相对分配百分数分别为1.80%、16.21%、56.39%和25.60%;(2)两个树种的地上生物量与地下生物量均呈现显著线型关系(p<0.001),拟合方程系数红松为0.30,紫椴为0.27;(3)基于胸径(dbh)建立红松和紫椴各器官的生物量模型可解释量分别超过了96%和90%,与其比较,利用树高(h)为变量建立两者的模型可解释量有所降低,采用胸径-树高(d2h)作为变量建立的生物量模型未能显著提高预测精度.综合模型解释量和回归系数显著性可知,胸径是建立两个树种各器官生物量模型的可靠变量.图2表4参31
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