小兴安岭针阔混交林碳汇结构特征的研究  

The Study on the Structural Characteristics of the Mixed-wood Carbon Sink in Xiaoxinganling Area

作　　者：崔崧 肖锐 王文帆[2] 刘滨凡[2] CUI Song;XIAO Rui;WANG Wenfan;LIU Binfan(Forestry Scientific Institute of Heilongjiang Province,Harbin 150081,China;Forestry Academy of Heilongjiang Province,Harbin 150081,China)

机构地区：[1]黑龙江省林业科学研究所,哈尔滨150081 [2]黑龙江省林业科学院,哈尔滨150081

出　　处：《森林工程》2020年第6期30-35,共6页Forest Engineering

基　　金：黑龙江省应用技术研究与开发计划项目(GA19C006-3)。

摘　　要：针阔混交林结构特征对碳汇功能起到直接的影响作用,为明确小兴安岭碳汇结构特征,采用生物量方程计算生物量,并以生物量推算碳储量。结合垂直投影面积、角尺度、混交度及竞争指数等林分结构指标,对小兴安岭主要的针阔混交林碳储量特征进行研究,得到以下研究结果:①小兴安岭针阔混交林碳汇累积倾向于较大冠幅、较高混交度、较小竞争指数和随机分布状态的林木,但个别林型存在差异,原始林碳汇累积倾向于中度混交(混交度0.5)状态的林木,过伐林碳汇累积倾向于团块状分布(角尺度0.75)状态的林木;②针阔混交林内林木的碳汇量与冠幅存在显著的正向相关关系,与竞争指数存在显著的负向相关关系;③成熟林木个体占据较高的资源和空间生态位,碳汇累积处于优势地位,可从垂直空间角度增加林分错层空间的资源利用效率。合理的增加非顶级群落林分的混交比例有利于碳汇累积的增加。过伐林可以通过引入伴生树种等方法加快更新速度,改善团块状碳汇累积结构。The structural characteristics of coniferous and broad-leaved mixed forests have a direct effect on the carbon sink function.In order to clarify the structural characteristics of the carbon sink in Xiaoxinganling,the biomass equation was used to calculate the biomass,and the biomass was used to calculate the carbon storage.Combined with stand structure indexes such as vertical projection area,angle index,mingling index and competition index,the carbon storage characteristics of main coniferous and broad-leaved mixed forests in Xiaoxinganling were studied,and the following results were obtained.①The carbon sink of coniferous and broad-leaved mixed forests in Xiaoxinganling tended to be larger crown width,higher mingling index,lower competition index and random distribution,but there were differences among individual forest types.Carbon sink accumulation of vigin forest tended to moderate mixed(mingling index 0.5)state,and overcut forest tended to clump distribution(angle index 0.75)state.②There was a significant positive correlation between carbon sink and crown width,and a significant negative correlation with competition index in coniferous and broad-leaved mixed forests.③Mature trees occupied a higher resource and spatial niche,and carbon sink accumulation was in a dominant position,which can increase the resource utilization efficiency of stand split-layer space from the vertical spatial perspective.A reasonable increase in the mixing ratio of non-top community stands was beneficial to the increase of carbon sink accumulation.Overcutting can accelerate the regeneration rate and improve the accumulation structure of carbon sink by introducing associated tree species.

关 键 词：冠幅 混交度 角尺度 竞争指数 针阔混交林 

分 类 号：S718.5[农业科学—林学]