昆明西山半湿润常绿阔叶林及其〖HJ*3〗〖HJ*2〗次生演替群落的更新特征

李小双1; $22; 3; $24; $25; 6; $21*

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*昆明西山半湿润常绿阔叶林及其〖HJ3〗〖HJ2〗次生演替群落的更新特征*
李小双1，宋亮2，3，陈军文4，袁春明5，6，张良1*
1.国家林业局昆明勘察设计院，昆明 650216;2.中国科学院西双版纳热带植物园，昆明 650223;3.中国科学院研究生院，北京 100049;4.云南农业大学农学与生物技术学院，昆明 650201;5.国家林业局云南珍稀濒特森林植物保护和繁育重点实验室，昆明 650204;6.6. 云南省林业科学院，昆明 650204

摘要:

对昆明西山国家森林公园处于不同演替阶段的云南油杉林、云南油杉-滇青冈混交林和滇青冈林内木本植物幼苗的种类组成、数量及更新方式等进行了调查分析。结果表明：在所调查的共144个25 m2的样方中，共记录到木本植物幼苗32科45属共49种。随着演替的进行，幼苗总密度表现出先增加后降低的趋势，处于演替中期的云南油杉-滇青冈混交林内幼苗最丰富，平均密度达80株·25 m 2。在不同演替阶段各植被类型中，实生和萌生两种更新方式同时存在，单一的更新方式可能使群落的更新面临较大的风险。幼苗发生了顶死或梢枯后，从其根颈处生出多个萌枝形成多干基株的更新方式结合了实生和萌生更新各自的优点，是幼苗在与环境长期作用过程中进化出的一种有效对策。

关键词: 滇青冈林更新方式空间分布幼苗云南油杉林云南油杉-滇青冈混交林

DOI：

分类号:Q948.15

Fund project:

Seedling regeneration of the primary semi humid evergreen broadleaved forest and its secondary succession communities in Xishan， Kunming

LI XiaoShuang1， SONG Liang2，3， CHEN JunWen4， YUAN ChunMing5，6， ZHANG Liang1*

1.China Forest Exploration and Design Institute of Kunming， Kunming 650216， China;2.Xishuangbanna Tropical Botanical Garden， Chinese Academy of Sciences， Kunming 650223， China;3.Graduate University of Chinese Academy of Sciences， Beijing 100049， China;4.College of Agronomy and Biotechnology， Yunnan Agricultural University， Kunming 650201， China;5.Yunnan Key Laboratory for Conservation of the Rare， Endangered and Endemic Forest Plants of State Forestry Administration， Kunming 650204， China;6.6.Yunnan Academy of Forestry， Kunming 650204， China

Abstract:

Woody plant seedlings in Keteleeria evelyniana community，Keteleeria evelyniana Cyclobalanopsis glaucoides community，and C.glaucoides community in Xishan National Forest Park，Kunming，were surveyed and analyzed to determine their regeneration characteristics including species composition，density，regeneration mode，and etc. In all the 144 plots(5 m×5 m each)，49 woody plants seedling belonging to 45 genera，32 families are recorded. The total density of seedling showed a unimodal change in response to the forest succession progress，with the highest density in the K.evelyniana C.glaucoides community(80 stems·25 m 2). Seedling regeneration and sprouting regeneration coexisted in communities at different succession stages；single regeneration mode may increase the risk of unsuccessful regeneration of communities. However，seedling re sprouting regeneration，which had been formed during the long term interaction between seedlings and their environment，seems to be an effective strategy as it combined the advantages of both modes.

Key words: Cyclobalanopsis glaucoides community regeneration mode spatial distribution seedling Keteleeria evelyniana community K.evelyniana-C.glaucoides community