通过样地调查,对陕西子午岭的天然柴松林的植物组成和群落结构进行了研究.结果表明:(1)柴松群落中,共有52科120属162种种子植物,可划分为12个类型和9个变型,北温带成分最多(51属),占总属数的49.51%,热带植物成分占一定比例;(2)柴松群落可划分为5个群落类型:柴松+辽东栎-水构子-苔草群落;柴松-虎榛子-苔草群落;柴松-水构子-苔草群落;柴松-黄蔷薇-苔草群落;柴松-绣线菊-苔草+野棉花群落;(3)不同群落类型的物种组成和林分结构有所不同,但以柴松为优势种所构建的群落环境有一定的相似性.%Based on the detailed plot investigation and plant specimen collection carried out in Ziwuling ridge, Shaanxi Province, the species composition and community structure of entire Pinus tabulaeforrnis f. shekannesis community and those in different community types which located in different habitats were systematically studied. The results showed: (1) there were 162 species of seed plants in P. tabulaeformis f. shekannesis community, belonging to 120 generas, 52 families, and among them Rosaceae, Leguminosae, Compositae, Gramineae and Labiatae included more than 5 genera. The florae of seed plants presented a diversified and complicated composition, including 12 types and 9 variants, among which the north temperate distribution composition were significantly dominant, accounting for 49.51％ in total genera,and the tropic elements took some proportions; (2) based on the values of importance of the species P. tabulaeforrnis f. shekannesis community in Qiaobei forest area could be divided into 5 community types: P. tabulae formis f. shekannesis + Quercus wutaishannica - Cotoneaster multi florus - Carex sp.Community, P. tabulae f ormis f. shekannesis - Ostryopsis davidiana - Carex sp. Community, P. tabulae f ormis f. shekannesis-Cotoneaster multi florus -Carex sp. Community, P. tabulae f ormis f. shekannesis-Rosa hugonis - Carex sp. Community, and P. tabulaeformis f. shekannesis- Spiraea salici folia -Carex sp. +Anemone upehensis Community; (3) species composition and stand structure of different community types were different and the community environment, in which P. tabulaeformis f. shekannesis was dominant species, showed some similarity.
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