亚热带植物科学2024，Vol.53Issue(4)：308-314,7.DOI:10.3969/j.issn.1009-7791.2024.04.003
茂兰喀斯特森林小叶兜兰种群结构和数量动态分析
Population Structure and Quantitative Dynamics of Paphiopedilum barbigerum in Maolan Karst Forest
摘要
Abstract
Paphiopedilum barbigerum was listed as a national level to protect plants.The purpose of this study aimed to investigate the population structure and quantity changes of P.barbigerum.Eight populations were randomly selected in Maolan National Nature Reserve of Guizhou Province for detailed statistics and analysis,and to analyze the population age structure,static life table,survival and mortality curves,and population dynamic quantitative indicators.The results showed that P.barbigerum mainly grew at an altitude range of 680 m to 800 m in Maolan National Reserve,and the slope direction was selected to distribute in the east,southeast,south and southwest slopes,especially in the south slope,where the proportion of rock exposed in small habitats exceeds 70%.The age structure of the population was pyramidal,showing a growing trend.The survival curve was close to Deevey-Ⅱ type,which indicated that the mortality of different age groups tended to be consistent,indicating that the population development had a tendency to continue to increase steadily.From the quantitative indicators of population structure dynamics,the dynamic index of individual number(Vx)were all positive,indicating that under the condition of no external interference,the active index of age structure of the whole population(Vpi)was 0.502＞0,indicating a positive increase in age structure of the whole population.When the population was disturbed,the active index of age structure(Vpi')was 0.024＞0,which was much smaller than Vpi and tended to zero,and the population structure tended to be stable.关键词
小叶兜兰/种群结构动态/静态生命表/茂兰保护区Key words
Paphiopedilum barbigerum/population structure dynamics/static life table/Maolan Reserve分类
农业科技引用本文复制引用
余成俊,白萍,柳华富,陈正仁,莫家伟,姚成林,费仕鹏..茂兰喀斯特森林小叶兜兰种群结构和数量动态分析[J].亚热带植物科学,2024,53(4):308-314,7.基金项目
贵州省林业优秀青年人才培养专项资金(黔林科合J字[2022]18号) （黔林科合J字[2022]18号）
