【摘要】 广西木论喀斯特林区，位于我国中亚热带南缘。据６００ｍ２翠柏群落样方调查结果：有维管束植物７６种，隶５１科６９属，其中单种的属占８９．９％。植物区系以热带分布区类型为主，占总属数（不含世界分布）的７１．０％，温带分布占２５．８％，但群落的种类组成是以亚热带成分占优势，按Ｒａｒｎｋｉａｅｒ生活型分类系统，高位芽植物占８２．９％，地面芽植物占１５．８％，一年生植物占１．３％，缺少地上芽和地下芽植物；从生理角度分析，叶级以小型叶（包括微型和鳞型叶）为主，占５９．２％；叶型以单叶占的比例最大，为８６．８％，群落结构可分为乔、灌、草三层，其中乔木层又可分出二个亚层。对该群落各乔木种群的大小结构分析，显示出翠柏群落是相对稳定性较大的群落。更多还原

【Abstract】 This article deals with the community of Calocedrus macrolepis which is located in carst forest area of Mulun (107°540′01″～108°05′51″E, 25°07′01″～25°12′22″N) of Huanjiang , Guangxi, on the south boundary of the mid-subtropical region in China.According to the investigation in 6 plots of 600 m2 in total, the community of calocedrus macrolepis is consisted of 76 species of vascular plants, 51 families and 69 genera. Of the 69 genera 89.9% are single species genera. Analysis of floristic geographical elements showed that percentages of tropical elements are high, making up 71.0% of the total numbers of genera (no including Cosmopolitan), temperate elementsare 25.8%, but the species coposition of the community is mainly consisted of subtropical elements. According to Raunkiaer’s classification system of life-form, the plant life form spectrum of Calocedrus macrolepis community shows that phanerophytes are rich, making up 82.9% of total species, hemicryptophytes and therophytes are 15.8% and 1.3% of total species respectively, chamaephytea and geophytes are missing on this plant life form spectrum. The leaf size class of community is mainly microphylla (59.2%), and 86.8% of the leaf pattern is simple leaf. The community can be structurally divided into arboreous layer, shrob layer and herbaceous layer. The arboreous layer can be subdivided into 2 layer too. Analysis of the age structure of the trees of community showed that it is a community of relative stability.更多还原