白芨生态习性的研究.doc

1 白芨生态****性的研究李子辉 1 邓纲 2 阎凯 3 魏晓梅 2 顿昊阳 2 刘久东 2 1 湖南文理学院生命科学系, 湖南常德 415000 ; 2 云南大学植物改良与应用实验室, 云南昆明 650091 ; 3 云南大学环境科学与生态修复研究所, 云南昆明 650091 摘要: 本文通过对野外生态调查,田间和室内实验,对白芨的自然分布规律、繁殖机制、野生种群特征及其对生境中各生态因子的适应性等做了系统的分析。结果表明:白芨在自然地理上的分布呈广域分布,在微域分布上,呈零星的不连续分布;种群内部其独特的块状茎繁殖和种子繁殖,使其呈现集群分布;在环境适应性方面,对水分、温度、光照、土壤等生态条件均具有较宽的生态幅,抗逆性较强;此外,白芨种群对群落具有较强的选择性。关键词: 白芨分布生态****性适应性 The study of Bletilla striata ecological habits Li Zi-Hui 1 Deng Gang 2 Yan Kai 3 Wei Xiao-Mei 2 Dun Hao-Yang 2 Liu Jiu-Dong 2 1 Department of Life Science, Hunan University of Arts and Science, Changde 415000 , China; 2 Laboratory of Plant Improvement and Utilization, Yunnan University, Kunming 650091, China; 3 Institute of Environmental Sciences and Ecological Restoration, Yunnan University, Kunming 650091, China Abstract T his paper systematically analyzed the natural distribution laws, g eneration mechanism, wild population characteristic s and adaptability of various ecological factors in Bletilla striata by using the methods of field ecological investigation , field and l aboratory experiment results were as follow: the natural geograph ical distribution of Bletilla striata was wide-range distribution, but it showed sporadic discontinuious distribution within its micro-distribution .The population of Bletilla striata showed contagious distribution because of its special tuber and seed propagation . In the evironmental a