不同发育阶段华山松林下药用植物多样性及其数量特征

A Study on Medical Plant Diversity and their Quantity Characteristics under the crown of Pinus armandi plantation of Different Development Stages in Xishan of Kun Ming

对昆明西山幼林期和杆材林期两个不同发育阶段华山松林的药用植物多样性及其数量特征进行了研究。结果表明:不同发育阶段的药用植物主要优势种组成不一,其重要值也不同;在灌木层,华山松幼龄林优势种为火把果,杆材林期优势种为小铁子,幼龄期草本层优势种为土牛膝,而杆材林期优势种为小铁子。就药用植物多样性指数而言,杆材林期灌木层物种数及香农-威纳指数分别比幼龄期的大,而杆材林期的均匀度指数却比幼龄期的小;杆材林期草本层的物种数、香农-威纳指数及均匀度指数分别比幼龄期的大;表现出林下药用植物多样性指数随着林分年龄的增长而呈上升的趋势。

The medical plant diversity and their quantity characteristics under the crown of Pinus armandi plantation of different development stages were analyzed in this paper. The results showed that the dominant species were different in different stages and relative importance values were also different. The dominant medical species of shrub layer of young plantation was Pyracantha fortuneana but in haulm plantation was Myrsine Africana. The dominant species of herb layer was Achuranthes bidentata in young plantation and the dominant species of the same layer of haulm plantation was Myrsine africana. The species richness and Shannon-Wiener indexes of shrub layer of haulm plantation were larger than that of young plantation respectively. But evenness of community of haulm plantation was smaller than that of young plantation. The species richness and Shannon-wiener indexes and evenness indexes of herb layers of haulm plantation were more than that of young plantation indexes of the medical plant diversity increased with increasing of age.