喀斯特区白云质砂石山天然次生灌木林植物多样性研究

本文对贵州凯里喀斯特区最难恢复的白云质砂石山天然次生灌木林的植物多样性进行了初步研究。对研究区6个样地共计2 400m2植被的调查研究结果表明:白云质砂石山天然次生灌木林木本植物有21科37属49种,草本植物有6科10属15种,植物组成以落叶灌木树种+多年生草本为主;白云质砂石山天然次生灌木林群落各层次的优势种都比较明显,灌木层以金佛山荚蒾Viburnum chins-hanense、火棘Pyracantha fortuneana占优,草本层以五节芒Miscanthus floridulus、白茅Imperata cy-lindrical、荩草Arthraxon hispidus处于优势地位;物种丰富度和多样性特征指数都小,生境资源匮乏是导致白云质砂石山物种丰富度、植物多样性小的主要原因。

Plant Diversity of Natural Secondary Shrub Forest in Dolomite Rocky Hills of Karst Region

A preliminary study of plant diversity in the most difficult to restore natural secondary shrub forest in dolomite rocky hills in Karst region about kaili Guizhou.The research with six sample plots total 2400m2 of vegetation showed that 49 woody plants species belonging to 21 families and 37genera,15 herbs belonging to 6 families and10 genera.The main component of plant is shrub ＋ perennial.There existed the comparatively obvious dominant species within each layer of the natural secondary shrub forest in dolomite rocky hills： Viburnum chinshanense and Pyracantha fortuneana in shrub layer,Miscanthus floridulus and Imperata cylindrical and Arthraxon hispidus in herb layer as the dominant species.Richness of plant species index and diversity index were lower due to harsh habitat.