大兴安岭天然落叶松次生林不同演替阶段的空间结构  

Spatial Structure of Different Succession Stages of Natural Secondary Forest in the Daxing’an Mountains

作　　者：韩敏 董希斌 刘慧 张期奇 Han Min;Dong Xibin;Liu Hui;Zhang Qiqi(Key Laboratory of Forests Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province,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》2020年第6期123-127,共5页Journal of Northeast Forestry University

基　　金：国家重点研发计划项目(2017YFC0504103)。

摘　　要：以大兴安岭地区新林林业局翠岗林场的不同演替阶段的天然落叶松林样地(幼龄林、中龄林、近成熟林、成熟林)为研究对象,利用威布尔分布函数(Weibull)对混交度、大小比数、角尺度林分空间结构参数进行分析,探索天然落叶松林的林分空间结构特征、林分功能。结果表明:天然落叶松林不同演替阶段的样地平均混交度为0.098,按混交度数值由大到小依次为成熟林(0.235)、近成熟林(0.103)、中龄林(0.037)、幼龄林(0.017);天然落叶松林不同演替阶段平均大小比数,由高到低依次为成熟林(0.595)、近成熟林(0.504)、中龄林(0.500)、幼龄林(0.478);4块样地的角尺度,由高到低依次为成熟林(0.473)、中龄林(0.502)、近成熟林(0.500)、幼龄林(0.471)。随着演替的进行,混交度与胸径的大小比数逐渐增大,林木的聚集程度偏低,但从整体看呈随机分布格局,有利于群落演替的稳定性;说明随着演替的进行,生物多样性不断上升,树木逐渐增长,林分空间结构也逐渐稳定。Taking natural larch forest plots(young forest,middle-aged forest,near-mature forest,and mature forest)at different succession stages of Cuigang Forest Farm of New Forestry Bureau in the Daxing’an Mountains area,the Weibull distribution function(Weibull)was used to measure the spatial structure parameters of mixed stand,size ratio and angular scale stand,and explore the stand spatial structure characteristics and stand function of natural larch forest.The the average mixing degree of the plots in different succession stages of natural larch forest was 0.098,and the order of the mixed degree was mature forest(0.235),near-mature forest(0.103),middle-aged forest(0.037),and young-age forest(0.017);the average size ratio of natural larch forest at different succession stages,from high to low,mature forest(0.595),near-mature forest(0.504),middle-age forest(0.500),and young forest(0.478).The angular scale of the four plots,from high to low,are mature forest(0.473),middle-age forest(0.502),near-mature forest(0.500),and young forest(0.471).As the succession progresses,the ratio of the mixing degree to the breast diameter gradually increases,and the degree of forest aggregation is low,but the overall distribution is random,which is conducive to the stability of community succession.The biodiversity continues to rise,the trees gradually grow,and the spatial structure of the forest stands also gradually stabilizes.

关 键 词：天然落叶松林 林分演替 林分空间结构 森林群落 大兴安岭 

分 类 号：S718.54[农业科学—林学]