To understand the developing state and to effectively conserve the community of natural Pteroceltis tatarinowii forests in Huangcangyu natural reserve, the characteristics of the species composition, community structure and physiognomy were studied based on sampling survey method. The results show that there were 61 vascular plants in the community belonging to 56 genera and 39 families. The analysis of floristic geographical elements indicate that both tropical and temperate elements occupied high percentage respectively, however, the contribution of genera and species belonging to temperate areal-types was larger, and the composition of the flora appeared transitional character of temperate flora to tropical flora. The analysis of life form spectrum and leaf characters shows that the physiognomy of the community was characterized by deciduous phanerophytes and the hemicryptophytes had a large contribution. The community vertical structure was simple, which composed of tree layer, shrub layer and herb layer, and Pteroceltis tatarinowii was dominated in each layer; the forest natural regeneration was good, most populations of main tree species were increasing type, and the community had higher stability. However, many coppice shoots of Pteroceltis tatarinowii caused mainly by human disturbance (e.g. cutting the shrubs and herbs), were mainly distributed in shrub layer and herb layer with bundle consist of coppice sprouts, affecting the growth of understory plants and the stability of the community. Thus, the vegetation in understory should be conserved effectively.%为了解皇藏峪自然保护区内天然青檀林的发展状况、有效地保护青檀群落,采用样方调查法,对青檀群落的种类组成、结构、外貌特征进行了调查研究.结果表明:群落中有维管束植物61种,隶属39科56属.植物区系中热带成分和温带成分均占有较大比例,但以温带属种居多,呈现出由温带向亚热带过渡的特点.群落的组成物种以落叶高位芽植物为主,地面芽植物也占有较大比例.群落垂直结构简单,可分为乔木层、灌木层、草本层,青檀占绝对优势,林下更新良好,优势种群多呈增长型,群落处于稳定的生长状态.同时,人为干扰(如砍割灌草等)造成的大量青檀萌生个体呈多株丛生状集中分布于灌草层,影响着林下植物的生长和群落的稳定,建议加强对林下植被的保护.
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