| 黔中喀斯特森林群落光皮桦种群竞争初步研究 |
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| 引用本文： | 杨瑞,喻理飞,罗远飞,罗云.黔中喀斯特森林群落光皮桦种群竞争初步研究[J].贵州农业科学,2010,38(2). |
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| 作者姓名： | 杨瑞 喻理飞 罗远飞 罗云 |
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| 作者单位： | 1. 贵州大学,林学院,贵州,贵阳,550025
2. 贵州省修文县林业绿化局,贵州,修文,550200 |
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| 基金项目： | 国家重点基础研究发展规划项目专题(973计划)“喀斯特生物适应对策及物种优化配置”(2006CB4032-06);;国家林业科技支撑项目子专题“喀斯特地区退化天然林恢复与经营技术示范”(2006BAD03A1006-2);;贵州省科技计划项目“喀斯特区次生林结构与森林分类经营技术研究”[黔科合NY(2009)3052];;贵州大学自然科学青年科研基金项目“石灰岩山地生境特征与植物配置关系研究”[贵大自青基合字(2007)063] |
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| 摘 要： | 以黔中喀斯特区森林群落内的光皮桦种群及其伴生种作为研究对象,分析了群落内物种的径级结构变化关系及光皮桦种群的径级结构变化;以光皮桦生长态势最好的林分及其伴生树种为优势种的林分中优势度为环境容纳量,用重要值百分数求取种间竞争系数,用Lotka-Volterra竞争方程研究光皮桦及其伴生树种间竞争关系。结果表明:1)在森林群落的径级结构变化上,光皮桦在不同径级所占的株数比例都低于伴生树种,种群分布中幼苗数量不是最多,种群径级结构呈衰退型。2)在光皮桦同伴生树种间的竞争关系上,在达到平衡时,光皮桦及其伴生树种的相对优势度分别为20.30%和79.70%,说明随着森林群落的演替发展,未来光皮桦在森林群落中将处于从属地位。
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| 关 键 词： | 光皮桦 伴生树种 径级结构 竞争 |
Preliminary Study on Competition between Betula Luminifera Populations in Karst Forest Community in Central Guizhou |
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| YANG Rui,YU Li-fei,LUO Yuan-fei,LUO Yun.Preliminary Study on Competition between Betula Luminifera Populations in Karst Forest Community in Central Guizhou[J].Guizhou Agricultural Sciences,2010,38(2). |
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| Authors: | YANG Rui YU Li-fei LUO Yuan-fei LUO Yun |
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| Institution: | 1.Forestry College;Guizhou University;Guiyang;Guizhou 550025;2.Xiuwen Bureau of Forestry and Afforestation;Xiuwen;Guizhou 550200;China |
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| Abstract: | The Betula luminifera population and its associated species in karst forest community of Central Guizhou were studied to analyze the change relationship among species radial structure in communities and radial structure change of Betula luminiferapopulation.The percentage of the important value was used to determine the competition coefficient among species and the Lotka-volterra competitive equation was used to determine the competitive relationship among Betula luminifera populations and its associated sp... |
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| Keywords: | Betula Luminifera associated species radial structure competition |
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