小陇山林区濒危植物连香树群落特征分析  

Analysis on Community Characteristics of Endangered Plant Cercidiphyllum japonicum in Xiaolongshan Forest Region

作　　者：王莹 缑占邦 郭小龙 赵秋玲 张晶 WANG Ying;GOU Zhanbang;GUO Xiaolong;ZHAO Qiuling;ZHANG Jing(Dangchuan Forest Farm,Xiaolong Mountain Forestry Protection Center,Tianshui Gansu 741038,China;Forest Pest Control and Quarantine Station,Xiaolongshan Forestry Protection Center of Gansu Province,Tianshui Gansu 741020,China;Xiaolongshan Institute of Forestry Science of Gansu Province,Tianshui Gansu 741022,China;Gansu Provincial Key Laboratory of Secondary Forest Cultivation,Tianshui Gansu 741022,China)

机构地区：[1]甘肃省小陇山林业保护中心党川林场,甘肃天水741038 [2]甘肃省小陇山林业保护中心林业有害生物防治检疫站,甘肃天水741020 [3]甘肃省小陇山林业科学研究所,甘肃天水741022 [4]甘肃省次生林培育重点实验室,甘肃天水741022

出　　处：《甘肃林业科技》2024年第2期47-52,93,共7页Journal of Gansu Forestry Science and Technology

基　　金：天水市科技支撑项目“珍贵树种连香树种质资源调查与高效栽培技术”(2020-NCK-2322)。

摘　　要：通过分析小陇山林区珍稀濒危植物连香树种群状态特征,综合评价小陇山林区稀濒危植物连香树群落分布情况。在小陇山林区的连香树种群建立30 m×50 m固定样地,运用每木定位调查数据和林分状态与经营分析软件,分析小陇山林区珍稀濒危植物连香树森林空间结构、森林年龄结构、森林长势、森林密度、树种的竞争力、林木的健康情况、树种的构成、更替情况以及树种的丰富程度。结果表明小陇山林区连香树群落的q值为1.143 4,角尺度为0.513,林分潜在疏密度为0.54,林分的拥挤度为0.57,林分的树种优势度为0.05,健康木比例占91.5%,林分林层数为1,林分的Simpson指数取值为0.84。小陇山林区珍稀濒危植物连香树群落直径分布不合理,群落和种群的直径分布都呈多峰状分布,是典型的不完整异龄林;群落林木随机分布,属于理想的天然林水平格局;群落里的优势度低,连香树重要值紧邻锐齿槲栎位居第2;该林分为单层林;林分更新不良;树种多样性高;林内各树种高度混交,锐齿槲栎中大径木较多,在林分中占优势,导致该林分为锐齿槲栎为主的混交林。The analysis of the community status of rare and endangered plants of Cercidiphyllum japonicum in the forest area of Xiaolongshgan was applied,a comprehensive evaluation was summarized on the community distribution of Cercidiphyllum japonicum in Xiaolongshan forest area.Totally a 30 m×50 m fixed plot was established in Xiaolongshan forest area by selecting Cercidiphyllum japonicum community.In this study,by using per-tree location survey data and stand status and management analysis software,which analyzing as follows:the forest spatial structure,forest age structure,forest growth,forest density,tree species dominance,tree health status,tree species composition,regeneration and tree species diversity of the endangered plant Cercidiphyllum japonicum in Xiaolongsha forest region.The results showed that:the q value of the community was 1.1434,the angular scale was 0.513,the potential thinning density of the stand was 0.54,the crowding degree of the stand was 0.57,the tree species dominance of the stand was 0.05,the proportion of healthy trees was 91.5%,the number of stands was 1,and the Simpson index value of the stand was 0.84.Overall,the diameter distribution of the endangered plant community is not reasonable in Xiaolongshan forest region,and the diameter distribution of the community and population is multi-peak distribution,which is a typical incomplete different age forest.The random distribution of the community forest is an ideal horizontal pattern of natural forest.In the community,the dominant degree was low,and the value of the tree was next to that of Quercus aliena var.acuteserrata Maxim.The forest is divided into single-layer forest.Poor regeneration of stand;High diversity of tree species;The tree species in the forest are highly mixed,Quercus aliena var.acuteserrata Maxim has more large diameter trees,which is dominant in the stand,resulting in the forest being divided into mixed forests dominated by Quercus aliena var.acuteserrata Maxim.

关 键 词：连香树 群落状态 珍稀濒危 小陇山林区 

分 类 号：S792.99[农业科学—林木遗传育种]