磨盘山落叶阔叶林乔木结构动态  

Arbor Structural Dynamics of Deciduous Broad-leaved Forest in Mopan Mountain

作　　者：许艳红[1] 陈宇 汪钰涵 高毓阳 范春楠[1] 郭忠玲[1] 杨哲 XU Yanhong;CHEN Yu;WANG Yuhan;GAO Yuyang;FAN Chunnan;GUO Zhongling;YANG Zhe(Forestry College of Beihua University,Jilin 132013,China;Jilin Shangying State Forest Protection Center,Jilin 132607,China)

机构地区：[1]北华大学林学院,吉林吉林132013 [2]吉林市上营国有林保护中心,吉林吉林132607

出　　处：《北华大学学报（自然科学版）》2024年第6期727-732,共6页Journal of Beihua University（Natural Science）

基　　金：“十四五”国家重点研发项目(2022YFF1300502);北华大学研究生教育教学改革研究项目(JG[2021]09)。

摘　　要：按照CTFS标准和技术规范,于2005年设置5.76 hm^(2)森林动态定位监测大样地,以20 m×20 m样方为单位,利用网格法将其划分为5 m×5 m小样方,调查样方内胸径≥1 cm的木本植物种类、相对位置、胸径、树高、枝下高等,2009、2016、2021年采用同样方法复测调查。基于大样地内木本植物相关数据,研究次生落叶阔叶林乔木群落结构动态变化。结果显示:1)该样地共记录到乔木层植物16科23属33种,共241887株,大多属东亚和北亚温带分布区类型,是温带落叶阔叶林常见树种;2)历次调查树种径级组成均以小径级为主,树种个体主要集中在10 cm径级以下,幼龄树种占绝大多数;3)全林分、主要树种单位面积蓄积量随林龄增加林分蓄积量先减小后增大。主要树种年蓄积量大致分为4类:年蓄积量明显下降;年蓄积量增加幅度逐渐下降;在调查时间内年蓄积量变化不明显;年蓄积量逐年增加。各阶段蓄积量差异较大,主要是由幼苗更新量变化和群落发育阶段各树种生长特性不同导致。According to the standards and technical specifications of CTFS forest dynamic location monitoring plots(5.76 hm^(2))was established in 2005.As the unit of 20 m×20 m sample plot,which was divided into 5 m×5 m small samples by grid method.The species,relative position,chest diameter,tree height and branches of woody plants with an inner chest diameter≥1 cm were investigated.In 2009,2016 and 2021,the same method was used to carry out the retest survey.Based on the relevant data of woody plants in the sample plots,the changes of the arbor structural dynamics of deciduous broad-leaved forest were studied.The results showed that:(1)A total of 16 families,23 genera,and 33 species of arboreal plants were recorded in the sample site,with a total of 241887 plants.Most of them belong to the temperate distribution areas of East Asia and North Asia,and are common tree species in temperate deciduous broad-leaved forests;(2)The diameter class composition of tree species in previous surveys is mainly composed of small diameter classes,most individual tree species with a diameter below 10 cm,young tree species accounted for the vast majority;(3)The accumulation of the whole forest and the accumulation of the unit area of the main tree species decreases first and then increases with the increase of forest age.The accumulation of major tree species is roughly divided into 4 categories:the annual accumulation decreases significantly;The increase in annual savings gradually decreased;the annual savings did not change significantly during the survey time;the annual savings increased year by year.There is a large difference in the amount of accumulation at each stage,which is mainly caused by the change in the amount of seedling renewal and the different growth characteristics of each tree species in the community development stage.

关 键 词：乔木结构 重要值 平均胸径 单位面积蓄积量 

分 类 号：S718.542[农业科学—林学]