杉木人工林林分结构与固碳功能耦合关系研究  

Study on Coupling Relationship Between Stand Structure and Carbon Sequestration Function of Cunninghamia lanceolata Plantation

作　　者：孙宇 李际平[2] 曹小玉[2] SUN Yu;LJi-ping;CAO Xiao-yu(Sichuan Forestry Exploration and Design Institute,Chengdu 610081,China;Central South University of Forestry&Technology,Changsha 410004,China)

机构地区：[1]四川省林业勘察设计研究院,四川成都610081 [2]中南林业科技大学,湖南长沙410004

出　　处：《四川林勘设计》2020年第4期10-15,共6页Sichuan Forestry Exploration and Design

基　　金：湖南省自然基金面上项目(2018JJ2673);国家“十二五”科技支撑项目(2012BAD22B0505)。

摘　　要：为了研究杉木人工林林分结构与固碳功能之间的关系,确定杉木人工林合理的林分结构,为杉木人工林稳定生长和林分固碳能力的提高提供参考依据。以福寿林场杉木人工林的幼龄林、中龄林、近熟林3个龄组共18块样地为研究对象,选取平均胸径、郁闭度、物种丰富度指数和林层指数等12个林分结构因子,通过主成分分析法研究林分结构与固碳功能之间的关系,构建了杉木人工林林分结构与固碳功能之间的耦合关系模型。结果表明:通过降维,可以将影响林分固碳功能的结构指标分为4个主成分,分别为林木生长多样性指标、林分垂直分层指标、林分竞争指标和林分空间分布格局指标;林分结构因子与固碳功能相关性显著;固碳功能综合评价指数表现为近熟林最高,中龄林次之,幼龄林最差;杉木人工林林分结构与固碳功能之间关系密切,通过调整林分结构可以提高林分固碳功能。In order to study the relationship between stand structure and carbon sequestra-tion function of Cunninghamia lanceolata plantation,determine the reasonable stand struc-ture of Cunninghamia lanceolata plantation,and provide reference for the stable growth of Cunninghamia lanceolata plantation and to improve of its carbon fixation capacity.Eight-een plots of three age groups of Cunninghamia lanceolata plantation in Fushou forest farm were selected as the research objects.Twelve stand structure factors,including average DBH,canopy density,species richness index,forest layer index and so on.The principal component analysis was used to study the relationship between stand structure and carbon sequestration function of Cunninghamia lanceolata plantation and the coupling relationship model was established.The results showed that the structural indexes affecting the carbon sequestration function of stand could be divided into four principal components by dimen-sion reduction,which were tree growth diversity index,stand vertical stratification index,stand competition index and stand spatial distribution pattern index.There was a signifi-cant correlation between stand structure factors and carbon sequestration function.The comprehensive evaluation index of carbon sequestration function was higher,which showed that the near mature forests were the highest,the middle-aged forests were the second,and the young forests were the worst.There was a close relationship between stand structure and carbon sequestration function of Cunninghamia lanceolata plantation,and the carbon sequestration function could be improved by adjusting the stand structure.

关 键 词：杉木人工林 林分结构 固碳功能 主成分分析 耦合关系 

分 类 号：S71[农业科学—林学]