大兴安岭天然落叶松林的空间分布格局分析  

Spatial Distribution Pattern of Natural Deciduous Pine Forest in Daxing'An Mountains

作　　者：邱玉成 丰绪霞[2] QIU Yucheng;FENG Xuxia(Heilongjiang Shangzhi National Forest Farm Administration,Harbin 150001;Library of Northeast Forestry University,Harbin 150001)

机构地区：[1]黑龙江省尚志国有林场管理局,黑龙江哈尔滨150001 [2]东北林业大学图书馆,黑龙江哈尔滨150001

出　　处：《林业勘查设计》2020年第1期31-36,139,共7页Forest Investigation Design

摘　　要：基于2011年大兴安岭林区外业调查数据中的10个样地运用Gadow提出的混交度来反应林分树种的隔离程度;利用Hegyi提出的单木竞争指数计算的林分竞争指数,可以反应林分内林木的水平竞争情况;采用改进的Ripley'sK(d)函数的距离空间聚类分析功能,进行林木点格局分析。其结果表明,在落叶松中龄林内,由于林分发育空间充足,落叶松显著聚集分布;随着林分发展到近熟林和成熟林阶段,激烈的种内和种间竞争,导致林木出现大量的枯立木,落叶松聚集现象也明显下降。当林分发展到过熟林阶段时,在竞争中存活下来的落叶松发育成为大径木,死亡的落叶松则成为枯立木、倒木,此时林分内形成的林隙为落叶松幼苗的更新提供了空间,从而形成小径木落叶松。Based on 10 plots in the 2011 Daxinganling forest area field survey data,the degree of isolation provided by Gadow was used to reflect the isolation degree of the stand tree species;the stand competition index calculated using the single-tree competition index proposed by Hegyi can reflect the stand The horizontal competition of the forest trees;the distance-space clustering analysis function of the improved Ripley's K(d)function was used to analyze the forest tree point pattern.The results show that in middle-aged larch forests,due to the sufficient development space of the stands,the larch has a significant concentration and distribution;as the forests reach the stage of near-mature and mature forests,fierce intra-and inter-species competition leads to a large number of forest.The accumulation of dead larch and larch was also significantly reduced.When the stand develops to the stage of overripe forest,the larch that survived the competition develops into a large-diameter tree,and the dead larch becomes a dead tree or a fallen tree.At this time,the gap formed in the stand is a larch seedling.The update provided space to form trail wood larch.

关 键 词：天然落叶松 空间结构分布格局 混交度 竞争指数 

分 类 号：S791.22[农业科学—林木遗传育种] S758.53[农业科学—林学]