摘要
在资源量调查的基础上选择样地，采用１０ｍ×１０ｍ样方为基本调查单位，研究南方红豆杉种群，结果发现其在元宝山的种群是通过茎干萌生幼苗（构件）来延续和扩大的。种群结构可分为类型Ⅰ初始增长型、类型Ⅱ增长型种群前期类型、类型Ⅲ增长型种群、类型Ⅳ稳定型种群。对各样地的种群大小结构与大小级进行相关分析和负指数函数拟合，Ｐ１、Ｐ２、Ｐ３、Ｐ６、Ｐ７样地及种群综合大小结构呈显著相关关系。种群现状虽枯倒树较多但仍为稳定种群，元宝山红豆杉种群繁殖方式的发现和研究对开发和保护红豆杉植物资源具有重要意义。
Base on the resource investigation of Taxus chinensis var. mairei, plots sampling is selected and quadrate of 10 m × 10 m is used for unit to study Taxus chinensis var. mairei, community. Taxus chinensis var. mairei is a rare and endanger species in Yuanbaoshan, (109°07′～109°13′E, 25°22′～25°32′N) Guangxi. The results show that the development of Taxus chinensis var. mairei populations is greatly depended on its modules which sprout on its stem, the types of population size structure are classified into Ⅰthe initial growing type, Ⅱthe primary type of the growing type and, Ⅲthe growing type and Ⅳstable type. There many withered and threw trees, but the population is still in stationary. The modular population of size structure in plot 1, 2, 3, 6, 7 are significant correlation, while other plots are not. And the total population of plot 1-7 of size structure in Yuanbaoshan is significant correlation. In this study, six models of negative index functions are given and the find of Taxus chinensis var. mairei population communication and regeneration will show the methods to conserve and develop the population.
出处
《广西植物》
CAS
CSCD
北大核心
1998年第4期385-389,共5页
Guihaia
基金
广西自然科学基金
关键词
南方红豆杉
构件种群
相关关系
大小结构
大小级
Taxus chinensis var. mairei
modular population for size structure
correlation
models of negative index functions
