吕梁山南端白皮松的群落特征及其多样性的研究

选择白皮松群落分布较集中的黑虎沟和柳家山两个地段设计26个样地,用样方法进行调查,共作样方426个。分析了白皮松群落的种类组成,区系特点,群落外貌,垂直结构和水平结构等群落学特征,并对该群落的环境概况进行分析,计测了不同地段上群落的频盖度指标和不同层次上的ShannonWiener指数、Simpson指数、Pielou指数和种间相遇指数。结果表明:白皮松主要分布于海拔900~1400米之间,在吕梁山南端白皮松群落组成种类约70种,北温带分布属占优势。矮高位芽植物种类多,数量大,是白皮松群落的优势层片。柳家山乔木层为白皮松单优组成,H值为0.706;灌木层H值最高为2.351;草本层H值为1.257。黑虎沟乔木层为多优树种组成,H值为1.825;灌木层H值为2.308;草本层H值为2.400。本研究为白皮松可持续利用和保护提供了有益的参考。

THE STUDY ON PINUS BUNGEANA COMMUNITY CHARACTERISTICS AND SPECIES DIVERSITY IN THE SOUTH OF MT.LULIANG

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.