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Effects of Adult Tree Density,Distance to Coast and Understory on Natural Regeneration of Pinus thunbergii Coastal Protection Forest in Yantai Region
Authors
张志东
毛培利
+3 more
王光美
薛钦昭
韩广轩
Publication date
31 December 2008
Publisher
Abstract
为阐明黑松(Pinus thunbergii)海防林天然更新的影响机制,在对烟台典型样地样方调查的基础上,采用统计分析方法,分析成年个体密度、距海岸距离、草本和灌木盖度对其天然更新的影响.结果表明,黑松海防林径级分布呈逆J字型分布,判定系数R~2达到了0.99,表明所调查的黑松种群是一个能够自我维持、稳定发展的异龄种群;幼苗和幼树随着成年个体密度和距海岸距离的增加,个体数呈先上升后下降趋势,而随着草本和灌木盖度的增加,表现出下降倾向;小树个体数与灌木盖度呈正相关,与成年个体密度、距海岸距离和草本盖度关系不明显.处于不同生活史阶段的幼龄植株在成年个体密度、距海岸距离及下层植被的影响下表现出了不同的适应策略和机制,理解这些更新规律,是黑松海防林可持续管理的前提
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Last time updated on 18/09/2018