桉树工业原料林林下植物物种多样性研究

Study on Undergrowth Vegetation Species Diversity in Industrial Plantation of Eucalyptus

通过群落学调查，根据30块样地的调查资料，采用物种丰富度、Simpson指数、Shannon—Winner指数和均匀度指数，分析了桉树工业原料林林下植物物种多样性特征。结果表明：在1350m^2的样方内，桉树工业原料林林下物种丰富度的排序为草本层〉灌木层，灌木层物种丰富度为4～16，草本层为10～22。按Simpson指数和Shannon-Winner指数的排序为灌木层〉草本层，灌木层Simpson指数的变化范围0．6391～0．8599，Shannon—Winner指数为1．1425～2．2608，草本层Simpson指数的变化范围0．0965～0．8168，Shannon—Winner指数为0．3114～2．0229。基于Simpson指数的均匀度和Shannon—Wiener指数的均匀度的排序为灌木层〉草本层。

In this paper, according to investigation information of 30 the plots, undergrowth vegetation species diversity in industrial plantation of Eucalyptus were studied. The main results were as follows： In 1 350 m^2 the plots, vegetation species abundance of industrial plantation of Eucalyptus were in the order of herb layer 〉 shrub layer, species abundance of shrub layer were 4 ～ 16, and herb layer were 10 ～ 22. Simpson diversity index and Shannon-Wiener diversity index were in the order of shrub layer 〉 herb layer. Simpson diversity index of shrub layer was 0. 639 1 ～ 0. 859 9, Shannon-Wiener diversity index of shrub layer was 1. 142 5 ～ 2. 260 8, Simpson diversity index of herb layer was 0. 096 5 ～ 0. 816 8, Shannon-Wiener diversity index of herb layer was 0. 311 4 ～ 2. 022 9. Evenness index of industrial plantation of Eucalyptus were in the order of shrub layer 〉 herb layer.