天然落叶松林不同演替阶段空间结构参数的多元分布  

Different Succession Stages of Natural Larix gmelinii Forest Multivariate Distribution of Spatial Structure Parameters

作　　者：张佳旺 董希斌 郭奔 刘慧 张莹 任允泽 滕弛 宋梓恺 张雨晨 Zhang Jiawang;Dong Xibin;Guo Ben;Liu Hui;Zhang Ying;Ren Yunze;Teng Chi;Song Zikai;Zhang Yuchen(Heilongjiang Province Key Laboratory of Forest Sustainable Management and Environmental Microorganism Engineering(Northeast Forestry University),Harbin 150040,P.R.China)

机构地区：[1]森林持续经营与环境微生物工程黑龙江省重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2024年第3期1-9,共9页Journal of Northeast Forestry University

基　　金：国家重点研发计划项目(2022YFD2201001)。

摘　　要：2023年5月15—30日,在黑龙江省伊春市丰林县汤林林场建立不同演替阶段(中龄林、近熟林)固定监测样地,在森林群落中分别设立15块30 m×30 m的方形样地,将各样地划分为4个15 m×15 m的小样方,对胸径在5.0 cm及以上的乔木进行每木调查、每木检尺,记录样地内林木的树种、胸径、树高;应用RStudio计算中龄林和近熟林的天然落叶松(Larix gmelinii)林分空间结构参数(混交度、大小比数、密集度、角尺度)、统计林分空间结构参数的5种多元分布频率(零元分布、一元分布、二元分布、三元分布、四元分布),系统分析各林分的林分空间结构特征与功能。结果表明:(1)落叶松林的零元分布,两种不同演替程度的林分,整体呈随机分布、混交较好的中庸生长状态,但近熟林比中龄林较密集。(2)落叶松林的一元分布,林分内多数林木处于混交程度、密集程度良好,各大小比数等级占比处于比较相近的随机分布状态。(3)落叶松林的二元分布,两种林分在同一大小比数时的林木多数处于中度混交,同一密集度时的中龄林的密集程度分布相近,近熟林的密集度较集中。(4)落叶松林的三元分布,两种林分中,同一密集度和大小比数的林木,多数处于随机分布。(5)落叶松林的四元分布,两种林分在同一分布格局和生长状态时,相同密集度的林木多数处于中度混交或者混交状态较良好。(6)与比较传统的零元分布、一元分布对林分空间结构进行分析相比,使用多元分布能更加全面、清晰地分析不同演替阶段天然落叶松林的林分内部空间结构特征。From May 15 th to 30 th,2023,fixed monitoring sample plots were established at different succession stages(middle-aged forest,near-mature forest)in Tanglin Forest Farm,Fenglin County,Yichun City,Heilongjiang Province.Fifteen square sample plots of 30 m×30 m were set up in the forest community.Each sample plot was divided into four small sample plots of 15 m×15 m.A tree survey and measurement were conducted for arbor with a diameter at breast height(DBH)of 5.0 cm and above.The tree species,DBH,and tree height of the forest trees within the sample plot were recorded.RStudio was used to calculate the spatial structure parameters(mixing degree,size ratio,density,angular scale)of natural Larix gmelinii forests in middle-aged and near-mature forests,and to statistically analyze the five multivariate distribution frequencies of forest spatial structure parameters(zero-dimensional distribution,univariate distribution,bivariate distribution,trivariate distribution,quadrivariate distribution).This systematic analysis aimed to examine the spatial structure characteristics and functions of each forest stand.The results showed that:(1)The zero-dimensional distribution of L.gmelinii forests,for both forest stands at different successional stages,showed an overall random distribution and a moderate growth state with good mixing,but the near-mature forest was denser than the middle-aged forest.(2)The univariate distribution of L.gmelinii forests showed that most of the trees in the forest stands were in a good state of mixing and density,and the proportions of different size ratio grades were in a relatively similar random distribution state.(3)The bivariate distribution of L.gmelinii forests showed that for both forest stands,most of the trees with the same size ratio were in a moderate state of mixing,and the density distribution of the middle-aged forest was similar at the same density,while the near-mature forest density was more concentrated.(4)The trivariate distribution of L.gmelinii forests showed that for both forest

关 键 词：天然落叶松林 林分空间结构 多元分布 不同演替阶段 

分 类 号：S758.5[农业科学—森林经理学] S718.5[农业科学—林学]