关键词: 吕梁山, 白皮松, 群落学特征, 区系, 物种多样性

Abstract: The distributing centers of Pinus bungeana community on Mts. Liujia and Mts. Heihugou were selected as 2 stands and were designed 26 sampling lands. 426 plots were investigated by sampling method. Based on the plot data, Pinus bungeana community characteristics were analysed about the specific composition;the flora feature;the community physiognomy;the vertical and level structure;and the regulation of environment. The indexes of the frequency and the coverage and the species diversity(Shannon-Wiener index; Simpson index;Pielou index and Probility of Interspecies Encounter index) were measured in Pinus bungeana community in the sampling stands. The results are as following. The community of Pinus bungeana apparently distributed at 900~1400m in Lcies, which the genus of the boreal temperate zone is absolute dominance。The species and quantity of hemicryptophyte were more and larger. In Mt. Liujia, there was a striking dominant synusia of P. bungeana in the P. bungeana community, which was a monodominant community. The H index of tree layer was 0.706, brush layer 2.351, herb layer 1.257. But in Mt. Heihugou, tree layer was some monodominant community, the H index was 1.825;brush layer 2.308;herb layer 2.400. This discussion aims at scientific sustainable development and conservation of this rare phytobiocenose. uliang ranges;the specific composition of the community is about 70 spe.

Key words: Mts. Luliang, pinus bungeana, community characteristics, flora, species diversity