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| 东莞莲花山毛棉杜鹃种群结构动态分析 |
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莫罗坚,陈葵仙,黄倩林,刘颂颂,叶永昌,李伟豪
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东莞市林业科学研究所,东莞市林业科学研究所,东莞市林业科学研究所,东莞市林业科学研究所,东莞市林业科学研究所,东莞市林业科学研究所
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| 摘要: |
| 采用相邻格子法设置1 200 m2样地调查广东省东莞市莲花山毛棉杜鹃(Rhododendron moulmainense) 所在群落。通过绘制种-面积曲线和拟合方程计算确定了毛棉杜鹃所在群落实际取样最小面积为900 m2。通过计算重要值来分析毛棉杜鹃所在群落的物种组成；将林木以胸径分级，以径级结构代替年龄结构，采用匀滑技术编制静态生命表，绘制存活曲线、死亡曲线和消失曲线，分析毛棉杜鹃种群结构和动态趋势。结果表明：调查群落优势种是毛棉杜鹃，林层结构简单，物种以地带性森林演替前期树种为主；毛棉杜鹃种群的径级分布呈倒“J”型，属增长型种群，种群在4龄级（大树）阶段发生波动；毛棉杜鹃主要通过萌蘖方式进行繁殖，萌蘖对幼树的贡献明显；毛棉杜鹃种群存活曲线趋向于Deevey-Ⅲ型。 |
| 关键词: 毛棉杜鹃 最小取样面积 龄级结构 种群生命表 种群动态 |
| DOI： |
| 分类号:Q948.15 |
| 基金项目:广东省林业科技创新项目；东莞市科技计划项目 |
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| Population Structure and Dynamic of Rhododendron moulmainense in the Lianhua Mountain in Dongguan |
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moluojian,chenkuixian,huangqianlin,liusongsong,yeyongchang and liweihao
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Dongguan Institute of Forestry Science,Dongguan Institute of Forestry Science,Dongguan Institute of Forestry Science,Dongguan Institute of Forestry Science,Dongguan Institute of Forestry Science
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| Abstract: |
| The community of Rhododendron moulmainense was studied by setting one 1 200 m2 plot using adjacent-grids method on the Lianhua Mountain in Dongguan city of Guangdong Province. The minimum area of the sampling plot was 900 m2 by fitting the species-area curve. The species composition of the community was analyzed by calculating the Important Value (IV). The static life table, the survival curve, the mortality rate curve and the hazard rate curve were compiled by using the diameter at breast height class to represent the age class structure and smooth out technique to analyze the population structure and forecast the dynamics of population. Main results were showed as following: 1) The R. moulmainense community was dominated by R. moulmainense. The forest layer structure is simple and dominated by the pioneer species. 2) The population showed a inverted “J”-type diameter distribution and a increase structure, but fluctuated in the fourth age class phase. 3) Sprouting was the main reproductive strategy for the R. moulmainense population, which contributed greatly to the number of saplings. |
| Key words: Rhododendron moulmainense the minimum area of the plots population life table population dynamic |
