摘要
为了更好地保护和利用闽楠种质资源,探明闽楠天然群落特征,对宜春市明月山的6个闽楠天然分布群落的生境、物种组成、种群结构进行调查,采用平均木法对树高、胸径、近2年的胸径连年生长量、年均胸径生长量等多指标进行分析筛选优树。结果表明:(1)闽楠天然分布群落以竹阔混交为主,共有21科26属31种植物,以热带和亚热带区系植物为主,优势树种为闽楠,伴生树种丰富,集中分布区海拔为300~600 m,其生境条件较好,具有土层深厚、土壤肥沃湿润的特征。(2)天然群落中闽楠的胸径主要集中在20~<35 cm,累计占比达到58.51%;胸径在2.5~<10 cm和50cm及以上的闽楠活立木占比较少;同时也有一定数量的闽楠幼树,总体呈正态分布格局。(3)从6个闽楠天然群落中筛选出17株优势木,选定23#为优树,20#、18#活立木为备选优树。综上所述,明月山闽楠天然群落立地条件较佳,是稳定的成熟林分,其闽楠具有持续自然更新能力,处于优势种群。
In order to better protect and utilize the germplasm resources of Phoebe bournei and find out the characteristics of the natural community of Ph.bournei,the habitat,species composition and population structure of 6 natural communities of Ph.bournei were investigated.The average tree method was used to analyze the tree height,DBH,annual DBH growth in recent 2 years,and average DBH growth in recent years.The results showed that:(1)The natural distribution community of Ph.bournei was mainly composed of Phyllostachys edulis forest mixed with broad lived trees,and the natural population’s plants belonged to 31 species of 21 families,26 genera,mainly tropical and subtropical flora.The dominant tree species was Ph.bournei,and the associated tree species were abundant.The concentrated distribution area was 300 to 600 m above sea level,and its habitat conditions were good,with deep soil layer and fertile and moist soil characteristics.(2)In the natural community,the DBH of Ph.bournei mainly concentrated in 20 to less than 35 cm,accounting for 58.51%.The living trees of Ph.bournei with DBH of 2.5 to less than 10 cm,50 cm and above were less.At the same time,there were also a certain number of young trees of Ph.bournei,the overall normal distribution pattern.(3)17 dominant trees were selected from 6 natural communities of Ph.bournei.23#was selected as superior trees,and 20#and 18#living trees were selected as alternative superior trees.In summary,the natural community of Ph.bournei in Mingyue Mountain was a stable mature stand with better site conditions,and it was in a dominant population with sustainable natural regeneration ability.
作者
陈卫权
冯胜
龙桂根
陈淼淼
涂明锋
却志群
贺广德
易绍东
肖頔青
王勇
CHEN Weiquan;FENG Sheng;LONG Guigen;CHEN Miaomiao;TU Mingfeng;QUE Zhiqun;HE Guangde;YI Shaodong;XIAO Diqing;WANG Yong(Yichun Academy of Sciences,Yichun Jiangxi 336000,China;Yichun Forestry Bureau,Yichun Jiangxi 336000,China;Mingyue Mountain ecological forest farm,Yichun Jiangxi 336007,China;Forestry Bureau of Yichun Mingyue Mountain Hot Spring Scenic Area,Yichun Jiangxi 336007,China;Yichun University,Yichun Jiangxi 336000,China)
出处
《南方林业科学》
2024年第6期39-45,共7页
South China Forestry Science
基金
江西省省级林业专项资金林木种苗补助项目“宜春市明月山生态公益林场闽楠省级种质资源库”。
关键词
闽楠
天然群落
群落特征
优树
Phoebe bournei
natural population
population characteristics
plus trees
