山西五鹿山白皮松林的群落结构

Community Structure of Pinus bungeana Forest on Wulu Mountain in Shanxi Province

在山西五鹿山的白皮松林中共设立标准地6块,对这些标准地资料进行统计,以研究五鹿山地区白皮松林的群落结构、白皮松的生长规律以及群落生产力。结果表明:该群落生活型谱中以高位芽为主,不同于同纬度的温带植物群落特征。白皮松林的垂直结构简单,有乔、灌、草3层,3层共出现了60余种植物。乔木层白皮松为建群种;灌木层以虎榛子的重要值最大,为22.4;草本层以披针苔草重要值最大,达到75.5。白皮松林的径级结构呈不对称山状曲线;各径阶树木中,幼苗、幼树在数量上占优;随着胸径的增大,立木株数逐渐减少,这表明白皮松林更新良好,种群处于稳定的发展状态。

The community structure, growth regularity and community productivity of Pinus bungeana forest based on 6 stands from Wulu Moun- tain in Shanxi Province were analyzed. The results showed that in the life spectrum of community, phaenerophyte dominated the forest and this character is different from other temperate vegetation community at the same latitude. The vertical structure was simple, consisting of canopy, shrub and herb layers, and there are about 60 species in 3 layers. P. bungeana was constructive species in the canopy layer, while Ostriopsis da- vidiana dominated shrub layer with highest importance value of 22.4, and Carex lanceolata ranked the first in herb layer with the importance val- ue of 75.5. The diameter structure of P. bungeana forest was a asymmetry mountain shape, seedlings and saplings predominanted quantitatively, and the number of trees decreased while DBH increased, suggesting that P. bungeana population had a good regeneration and the community was in a stable development.