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天山云杉林林分特征与立地条件关联分析

DOI: 10.3724/SP.J.1145.2013.00410, PP. 410-414

Keywords: 天山云杉,林分特征,立地条件,空间分布,林分结构,西天山

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Abstract:

为探讨立地类型对林分特征的影响机制,以新疆西部天山云杉林中系统布设的监测样方数据为基础,研究了天山云杉林分结构特征与立地因子之间的关系.在192个20m×20m调查样方中共调查到1909个dbh≥1cm植株,胸高断面积共计291.632m2;天山云杉株数和胸高断面积最大,分别占林分总株数和总断面积的91.5%和97.4%.扩散系数c、平均拥挤度m*、聚块性指数m*/m和负二项分布参数k分析显示,天山云杉、天山桦、天山花楸、天山茶?子和刚毛忍冬均呈聚集性分布.天山云杉喜坡度较大的立地环境,而坡度较缓的阴坡及半阴坡不适合天山云杉的生长和发育;天山桦喜坡度较缓的阴坡及半阴坡立地环境;天山茶?子喜坡度较缓的阳坡及半阳坡立地环境.天山林区放牧干扰在一定程度上影响树种分布格局和立地偏好分析结果.

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