摘要
在长白山北坡自然保护区内,建立面积为1hm^2的阔叶红松林永久标准样地,对胸径1cm以上的每株树木进行定位监测,用空间结构参数——混交度、大小比数和角尺度分析该林分的空间结构.结果表明:该林分树木个体总体上处于中度混交水平,处于乔木上层和中层的树种混交度以强度混交和完全混交为主,明显高于乔木下层树种的混交度;基于胸径计算的大小比数和基于树高计算的大小比数的结果基本一致,都能客观反映该林分在垂直方向上的分化;树木个体整体分布格局与树木大小密切相关,当树木个体起测径阶1cm≤DBH<6cm时,林分呈聚集分布的格局,当起测径阶DBH>6cm时,林分呈随机分布的格局.
A 1hm^2 broad-leaved Korean pine （Pinus koraiensis） mixed forest plot was established in the Changbai Mountains, China in the period of 2006～2007. All the trees in the plot with DBH≥1 cm were positioned and monitored. The spatial structure parameters, mingling, angel index, and neighborhood comparison, were applied to describe the spatial structure of this stand. The results showed： 1） the mingling intensity of all trees was middling, and the mingling intensities of trees situated on the upper and middle storey were intensive and most intensive, which were more intensive than those mainly situated on the lower storey; 2） neighborhood comparison calculated based on DBH was almost the same as that based on height, both of which could reflect the differentiation of the stand vertically; 3） the overall distribution pattern was closely related to the minimum measured diameter （DBH）, if 1cm≤DBH6cm, the distribution pattern of all trees was aggregated, while if DBH≥6cm, the distribution pattern was random. Tab1, Fig4, Ref25
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2010年第4期529-533,共5页
Chinese Journal of Applied and Environmental Biology
基金
"十一五"国家科技支撑计划项目(No.2008BADB0B0503)资助
Supported by the National"11th Five-year Plan"Science & Technology Pillar Program of China(No.2008BADB0B0503)
关键词
林分结构
阔叶红松林
混交度
大小比数
角尺度
长白山
stand structure
broad-leaved and Korean pine mixed forest
mingling
neighborhood comparison
angel index
Changbai Mountains
