【摘要】 资源冷杉是生长于我国中亚热带中山上部的极度濒危种,通过踏查法及样方调查法对遂川南风面资源冷杉群落进行调查。研究表明:该群落在600 m~2的样地内共有维管束植物67种,隶属于35科53属;资源冷杉在群落最上层,该群落为针阔叶混交林;该群落矮高位芽、小高位芽植物占比较多,分别占46.27%和25.37%,群落的平均高度较低,有一定的苔藓矮曲林成分;立木级分析表明,Ⅱ级幼树数量最多,占61.29%,Ⅲ级幼树相比Ⅱ级幼树急剧减少,Ⅳ级立木缺失,Ⅴ级大树占22.58%,资源冷杉种群结构不完整,种群数量不稳定。该文探讨种群变化的趋势及应对策略,为资源冷杉种质资源保护及自然保护区管理提供有益借鉴。更多还原

【Abstract】 Abies beshanzuensis var. ziyuanensis is a critically endangered species in China, which is living in the upper part of middle mountain in subtropical zone. Field investigation and quadrat method were adopted to investigate the community including A. beshanzuensis var. ziyuanensis in Nanfengmian Mountain of Suichuan County Jiangxi Province. The results indicated that there were 67 vascular plants, which belonged to 53 genera and 35 families in the 600 m~2 quadrats; A. beshanzuensis var. ziyuanensis is in the uppermost layer of this coniferous and broadleaf mixed forest. The nanophanerophyte and microphanerophyte were the dominant life-form in this community, the percentages were 46.27% and 25.37%, respectively. The average height was low, and the community has an element of mossy dwarf forest. According to the analyses of tree stand classes, the percentages of II level sapling and V level tree were 61.29% and 22.58%, respectively. Compared with II level sapling, III level drastically reduced in number. So the population structure was incomplete, the population was from young age to middle age and the population quantity is unstable.This article discussed the trend of population and coping strategies, and provided useful reference to germplasm resources protection and nature reserve management, and its mechanism needs further study. The results of this study laid a foundation for further screening of excellent shoot types.更多还原