北京柏木井飞播油松群落特征分析

运用典型抽样法,对北京市延庆县刘斌堡乡柏木井22年生飞播油松林进行群落物种组成、区系、结构以及更新的研究,结果表明：飞播油松群落共有维管植物30科,51属,61种;生活型谱以高位芽植物为主,地面芽植物次之,地下芽植物占一定比例;该群落处于暖温带向温带过渡的区域,是中山特殊水热条件组合差异较大的体现;群落的垂直结构明显,乔木层密度过大,分化严重,出现大量的被压木,水平结构简单,群落名称可为油松-三裂绣线菊-披针叶苔草,其经营管理应有别于天然油松林.

Analysis on Community Characteristics of Beijing Baimujing Air Seeding Pinus tabulaeformis Plantation

The species composition, flora, structure and regeneration of the air seeding Pinus tabulaeformis communities in Baimujing, Liubingpu Township, Yanqing Country of Bejing Municipality were studied by typical quatrat sampling method survey. The results showed that 61 species of the vascular plant in 51 genera, 30 families existed in the communities. The phanerophyte life form was predominant in species, followed by hemicryptophyte and geocryptophyte life forms, indicating that there was great difference in the special combination of moisture and temperature in the mid - elevation mountainous area and the life form spectrum was associated with the climate feature of the transition from warm temperate to temperate zone. The study also showed that there was evident vertical structure inside the community. The P. tabulaeformis arbor layer was overly dense that triggered off severe differentiation among the trees and formed a large quantity of suppressed plants. The horizontal structure was pretty simple. These communities were named P. tabulaeforrnis-Spiraea trilobata-Carex lanceolata communities. It was proposed that the management regime of these artificial communities should be different from the natural forests of P. tabulaeformis.