西南农业学报2025，Vol.38Issue(8)：1644-1656,13.DOI:10.16213/j.cnki.scjas.2025.8.009
极小种群野生植物贵州山核桃种群结构与动态特征
Population structure and dynamic characteristics of Carya kweichowensis,a wild plant with extremely small population
摘要
Abstract
[Objective]The population structure and dynamic characteristics of Carya kweichowensis,a wild plant with extremely small popula-tion,were studied,and its survival potential and the causes of its endangerability were explored to provide a theoretical basis for the resource conservation and population restoration of C.kweichowensis.[Method]12 C.kweichowensis populations with typical distribution were selected as the research objects,and the age structure and life table of the populations were constructed with the method of diameter class instead of age class.Various population structure and dynamic characteristics were analyzed by quantitative analysis for population dynamic,drawing of survival curve and calculation of survival function.[Result]The population age structure showed that NJ,QF,LL,DW2 and TB populations accounted for a high proportion of young and middle age individuals,while the proportion of adult and old individuals was few or missing.The age structure showed an inverted"J"shape distribution,and the population was of the growing type,while the number of young individuals in RW,KJ,DW1,SJ,YL,WY and BSH populations accounted for a low proportion.The population was of the declining type.The population dy-namic index showed that C.kweichowensis had weak anti-interference ability and poor stability,and the environment had a strong screening effect on young,adult and old individuals.The survival curves of the 12 populations were all Deevey Ⅱ,and the survival ability of the individ-uals gradually decreased with the increase of age class;The survival function analysis showed that the C.kweichowensis population was stable at the middle age stage and vulnerable at the young,adult and old age stages.[Conclusion]The insufficient supply of seedlings and the death of surviving individuals are the two main factors affecting the decline of C.kweichowensis population.In order to promote the natural regenera-tion and recovery of the population,it is necessary to strengthen in situ conservation,appropriate artificial control and enhanced regression.关键词
贵州山核桃/年龄结构/种群动态指数/存活曲线/生存函数Key words
Carya kweichowensis/Age structure/Population dynamic index/Survival curve/Survival function分类
农业科技引用本文复制引用
杨焱冰,令狐克念,安明态,黄郎,颜凤霞,李鹤..极小种群野生植物贵州山核桃种群结构与动态特征[J].西南农业学报,2025,38(8):1644-1656,13.基金项目
贵州山核桃种质资源调查与收集项目(2024-ZM-22) （2024-ZM-22）
贵州新增国家重点保护野生植物资源调查评估项目(第二阶段)(MCHC-ZD20232020) （第二阶段）
贵州重点生态区生态系统优化创新能力建设项目(黔科合服企[2023]009) （黔科合服企[2023]009）
