不同类型马尾松混交林结构与生产功能的耦合关系  

The coupling relationship between structure and production function of different types of Pinus massoniana mixed forest

作　　者：陈歆宇 谭伟[2] 杨深钧 余昆隆 CHEN Xinyu;TAN Wei;YANG Shenjun;YU Kunlong(College of Forestry,Guizhou University,Guiyang 550025,Guizhou,China;Research Center of Forestry Information Engineering,Guizhou University,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州大学林学院,贵州贵阳550025 [2]贵州大学林业信息工程研究中心,贵州贵阳550025

出　　处：《中南林业科技大学学报》2023年第4期53-61,共9页Journal of Central South University of Forestry & Technology

基　　金：贵州省科技支撑计划项目“黔中马尾松可持续经营研究与示范”(黔科合支撑〔2017〕2520-1号)。

摘　　要：【目的】研究马尾松混交林林分结构与生产功能之间的耦合关系,旨在探讨合理的马尾松混交林类型、混交比例及林分结构,为维持群落结构稳定和提高森林生产力提供理论依据。【方法】以贵州省黎平县德顺乡的马尾松混交林为研究对象,对其中典型马尾松×阔叶混交林、马尾松×杉木混交林共12块样地的立地因子和林木因子进行调查,并选择3块马尾松纯林样地作为对照,根据获取的调查数据,对平均胸径、平均高、郁闭度、混交度等9种林分结构因子进行主成分分析,并利用降维后的主成分因子建立林分结构与功能的耦合关系模型,对混交林林分生产功能进行评价。【结果】影响林分生产功能的结构指标主要为林分的平均胸径、平均树高、平均枝下高、林分密度指数以及混交比例。15个样地的生产功能评价值可以分成5个等级,当前马尾松纯林(第Ⅰ类)的生产功能指数最高。混交林中马尾松×杉木混交林(第Ⅱ类)生产功能最佳,以1∶2或2∶1均较适宜,密度在730~950株/hm^(2)之间,混交度为0.3~0.4,郁闭度0.6左右,大小比为0.48~0.49;马尾松×阔叶混交林以2∶1比较适宜,其中马尾松×米槠(1∶1)、马尾松×梾木(1∶1)、马尾松×木荷(2∶1)等都需要调整密度和组成比例。【结论】混交比例不恰当和林分密度偏大是影响马尾松混交林生产功能的两个关键因素,密度和混交比例不适宜的林分都需要进行调整,以提高混交林的生产功能。【Objective】By studying the coupling relationship between stand structure and production function of Pinus massoniana mixed forest,this article aimed to explore the reasonable mixed type,mixed proportion and stand structure of P.massoniana mixed forest,so as to provide a theoretical basis for maintaining community structure stability and improving forest productivity.【Method】The P.massoniana mixed forest in Deshun Township,Liping County of southeast Guizhou was taken as the research object,the site and stand factors of 12 sample plots of the typical P.massoniana-broadleaf mixed forest and P.massoniana-Cunninghamia lanceolata(Lamb.)Hook.mixed forest were investigated.Three P.massoniana pure forest plots were selected as the control.Based on the survey data,principal component analysis was carried out for 9 forest structural factors,including the average DBH,average height,canopy density and mixing degree and so on,and the coupling relationship model of stand structure and function was established by using the principal component factor after dimensionality reduction.According to the coupling relationship model of stand structure and function,the production function of the mixed forest was evaluated.【Result】The main structural indexes affecting stand production function were average DBH,average tree height,average under crown height,stand density index and mixed ratio.The production function evaluation value of 15 sample plots can be divided into 5 grades,and the production function index of P.massoniana pure forest(type I)was the highest.Among the mixed forest,the production function of the P.massoniana mixed forest and C.lanceolata(typeⅡ)was the best,with a mixing proportion of 1∶2 or 2∶1,a density between 730 and 950 trees/hm^(2),a mixing degree between 0.3 and 0.4,a canopy density of 0.6,and a size ratio between 0.48 and 0.49.The most suitable mixing proportion for P.massoniana-broadleaf mixed forest was 2∶1,and the density and mixing proportion of P.massoniana-Castanopsis carlesii(1∶1),P.m

关 键 词：马尾松混交林 林分结构 生产功能 主成分分析 耦合模型 

分 类 号：S791.248[农业科学—林木遗传育种]