基于TWINSPAN分类的天然云冷杉-阔叶混交林发育阶段划分  

Determining the Development Stage of Natural Spruce-fir-broadleaved Mixed Forest Based on TWINSPAN

作　　者：周梦丽 雷相东[1] 国红[1] 段光爽[2] 阎晓旺 ZHOU Meng-li;LEI Xiang-dong;GUO Hong;DUAN Guang-shuang;YAN Xiao-wang(Research Institute of Forest Resource Information Techniques,Beijing 100091,China;Xinyang Normal University,Xinyang 464000,Henan,China;Jilin Forestry Survey and Planning Institute,Changchun 130022,Jilin,China)

机构地区：[1]中国林业科学研究院资源信息研究所,北京100091 [2]信阳师范学院,河南信阳464000 [3]吉林省林业调查规划院,吉林长春130022

出　　处：《林业科学研究》2019年第3期49-55,共7页Forest Research

基　　金：国家重点研发计划项目课题“长白山次生林抚育更新技术研究与示范”(2017YFC0504101)

摘　　要：[目的]提出了基于TWINSPAN双向指示种分析法的发育阶段划分方法。划分天然云冷杉-阔叶混交林的发育阶段,为天然林发育阶段划分和按阶段进行森林经营提供方法和理论依据。[方法]以吉林省森林资源一类连续清查中的172块云冷杉阔叶混交林为对象,采用TWINSPAN双向指示种数量分类法进行初始分类,对各初始类的生长、树种多样性和结构进行比较分析,进而划分其生长发育阶段。[结果]TWINSPAN法将云冷杉阔叶混交林分为3类(类1:云杉桦木混交林;类2:冷杉软阔叶混交林;类3:红松云杉硬阔叶混交林)。各类林分直径分布相似,基本均呈倒J形分布;垂直结构呈现一定的规律性。各类的林分因子、定期生长量存在一定差异,其中,林分的平均胸径、平均高、优势高、优势径、每公顷蓄积的大小排序为:类2<类1<类3;定期生长量的大小排序为:类3<类2<类1。各类林分的树种多样性存在一定差异,树种丰富度的大小排序为:类2>类3>类1,类2、类3的树种优势度低于类1。[结论]根据TWINSPAN、林分结构和生长分析,云冷杉阔叶混交林的生长发育阶段依次为:冷杉软阔叶混交林、云杉桦木混交林、红松云杉硬阔叶混交林。该方法也可用于其它天然林发育阶段的划分。[Objective] The study aims at determining the development stages of natural spruce-fir and broadleaved mixed forest so as to provide theoretical basis and technical support for its management according to stage.[Method] One hundred and seventy-two permanent sample plots of spruce-fir-broadleaved mixed forest in Jilin Province were selected for initial classification based on the TWINSPAN two-way indicator species quantitative classification analysis techniques.The growth,species diversity and stand structure of spruce-fir mixed forest were compared and analyzed to determine the development stage.[Result] The result indicated that the spruce-fir-broadleaved mixed forests could be divided into three groups (group 1:spruce-birch mixed forest;group 2:fir-softwood-broadleaved mixed forest;group 3:Korean pine-spruce-hardwood-broadleaved mixed forest) by TWINSPAN.In general,the diameter of all stands showed an inversed J-shape distribution.The height structure development of stand showed a trends related with tree species characteristics.There were differences in stand factors and periodic annual increment among these groups.The stand average diameter,mean height,dominant height,dominant diameter and volume all ranked by ascending order as group 2,group 1 and group 3;the periodic annual increment ranked by ascending order as group 3,group 2 and group 1.The species richness ranked by descending order as group 2,group 3 and group 1.The species dominance of groups 2 and 3 were lower than that of the group 1.[Conclusion] According to the above classification and characteristics analysis,the development stage of spruce-fir-broadleaved mixed forest was determined as fir-softwood-broadleaved mixed forest,spruce-birch mixed forest,Korean pine-spruce-hard-broadleaved mixed forest.This method might be suitable for other natural forests.

关 键 词：天然云冷杉-阔叶混交林 生长发育阶段 TWINSPAN分类 

分 类 号：S758.5[农业科学—森林经理学]