桂西北红椿(Toona ciliata)群落结构与更新特征  

Community Structure and Regeneration Characteristics of Toona ciliate in Northwest Guangxi Province of Southwest China

作　　者：冯立新[1] 买凯乐[1] 杨善云[4] 苏付保[4] 伊洪伟 李荣珍[4] 兰健花[4] 陈荣 朱昌叁 Feng Lixin;Mai Kaile;Yang Shanyun;Su Fubao;Yi Hongwei;Li Rongzhen;Lan Jianhua;Chen Rong;Zhu Changsan(Guangxi Eco-Engineering Vocational and Technical College,Liuzhou 545004,P.R.China;Yulin Normal University;Guangxi Zhuang Autonomous Region Forestry Research Institute)

机构地区：[1]广西生态工程职业技术学院、广西珍贵乡土树种良种培育中心(广西生态工程职业技术学院),广西柳州545004 [2]玉林师范学院 [3]广西林业科学研究院 [4]广西生态工程职业技术学院,广西柳州545004

出　　处：《东北林业大学学报》2022年第7期28-32,39,共6页Journal of Northeast Forestry University

基　　金：广西林业厅科技项目(桂林科字[2016]第29号);广西教育厅中青年教师基础能力提升项目(KY2016YB691);广西教育厅广西职业教育林业技术专业(群)发展研究基地项目(桂教职成[2019]63号)。

摘　　要：红椿为我国的濒危保护物种。以广西西北部红椿(Toona ciliata)主要集中地群落为研究对象,利用在隆林县、西林县和田林县的野外样地调查数据,分析广西红椿群落物种组成、多样性、结构及红椿更新特征。结果表明:广西红椿群落主要物种包括枫香(Liquidambar formosana)、苦楝(Melia azedarach)、银合欢(Leucaena leucocephala)、粗糠柴(Mallotus philippensis)、杜茎山(Maesa japonica)、马莲鞍(Streptocaulon griffithii)等。隆林县具有较高的科、属、物种丰富度,但乔、藤、草及总物种丰富度在3个地点间无显著差异;田林县和隆林县均在较低径阶和高径阶中具有较高的物种丰富度和个体多度,而西林县在低径阶中有较高的物种丰富度,但差异均不显著;红椿野生种群实生苗更新困难,在3个调查地点红椿实生幼苗平均仅为1.3株,在隆林调查点甚至未发现有更新的幼苗。因此,在保护红椿种群的同时,可适当进行红椿幼苗的人工补植。Taking the main concentration point Toona ciliate communities,an endangered species in China,in northwest Guangxi Province as test objects and with the field investigation data at three sites(Longlin,Xilin,and Tianlin County)of northwest Guangxi,we analyzed the species composition,species diversity,stem size class,and regeneration features of the T.ciliate communities.The dominant species in the T.ciliate communities were Liquidambar formosana,Melia azedarach,Leucaena leucocephala,Mallotus philippensis,Maesa japonica,and Streptocaulon griffithii.Longlin County had the higher species richness of family,genus,and shrubs than the other two counties,but no significant differences were observed in the species richness of trees and lianas and the total species richness among the three counties.Tianlin and Longlin County had the higher species richness at small and large size classes(DBH<5 cm and 20≤DBH<40 cm)and abundance at smaller size classes(DBH<1 cm),while Xilin County had the highest species richness and abundance at the lower diameter class(DBH<1 cm)and no significant differences were observed among the richness of diameter and height,and abundance of height.The wild T.ciliate population had weak regeneration ability through seedling.The seedlings of T.ciliata were 1.3 in average at the 3 sites,even no seedling was found in Longlin County.The artificial replanting of T.ciliate seedlings could be carried out properly while the Toona ciliate communities are protected.

关 键 词：桂西北 物种多样性 红椿 群落结构 更新 

分 类 号：S718.553[农业科学—林学]