摘要
保山茜(Fosbergia shweliensis)为云南特有树种,分布范围窄,数量少。为了对保山茜实施有效的保护,了解保山茜天然更新的状况,以云南高黎贡山南段保山茜较为集中的分布区域为研究区,通过设置样圆对保山茜天然更新情况进行调查。结果表明:(1)保山茜的更新主要在以母树为中心的10 m半径范围内,种群分布格局(S^(2)/m)为130.69,表明保山茜种群个体分布不均匀,幼树的分布是集聚型;(2)保山茜在10个样圆更新幼苗较多,但随着苗木龄级增长,数量急剧减少,长成小树或大树的苗木不多,不同龄级的更新分布株数差异显著(P<0.05);(3)保山茜不同方位角更新株数的分布差异不显著,表明保山茜的更新株数的分布和方位角关系不大;(4)距离母树2 m<d≤4 m,保山茜更新苗木最多,保山茜更新分布株数距母树远近的差异显著(P<0.05)。从保山茜的更新情况来看,虽然保山茜幼苗更新较好,但随着苗木的生长,大量的更新幼苗会逐渐减少,因此,开展人工促进扩繁,对于保山茜种群的扩大具有重要作用。
In order to better protect it and understand the status of its natural renewal,the natural regeneration of Fosbergia shweliensis was investigated by setting circle samples,so as to study the regeneration ability and distribution of it.The regeneration of F.shweliensis was mainly within a radius of 10 m centered on the mother tree.The intra-population distribution type of F.shweliensis(S^(2)/m)is 130.69.This indicated that the individual distribution of the population was not uniform and the distribution of sapling was in groups.The number of F.shweliensis at different heights in 10 circle samples indicated that there were more regeneration seedlings.However,with the growth of the age of the seedlings,the number was decreased sharply.In addition,seedlings growing into small or large trees were rare,and variance analysis of the number of newly distributed plants at different age levels was significant(P<0.05).The variance analysis of the number of newly distributed plants in different azimuths of F.shweliensis was very insignificant,which indicated that the number of its newly distributed plants had little relationship with the azimuth.According to the update results of different distance ranges from the mother tree,the most updated distance from the mother tree was 2 m<d≤4 m.The variance analysis of the number of trees from different distances from the mother tree was significantly different.The regeneration of F.shweliensis showed that its seedling regeneration was better.However,as the seedlings grow,the large number of regeneration seedlings will gradually decrease.The population is gradually expanding,so it is necessary to develop artificial methods to promote proliferation.
作者
赵欣凤
李贵祥
柴勇
和丽萍
邵金平
Zhao Xinfeng;Li Guixiang;Chai Yong;He Liping;Shao Jinping(Yunnan Academy of Forestry and Grassland,Kunming 650201,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2021年第9期15-18,共4页
Journal of Northeast Forestry University
基金
国家林业公益性行业科研专项(201304306)。
关键词
高黎贡山
保山茜
天然更新
种群
Gaoligong Mountains
Fosbergia shweliensis
Natural regeneration
Population
