宁淮高速公路带人工植被多样性评价与分析

Evaluation of Artificial Afforestation Diversity on Ninghuai Expressway

植物多样性是高速公路绿地系统生态功能的基础和绿地景观多样化的前提,也是其园林绿化水平的重要指标。笔者将植物多样性原理用于宁淮高速公路环境景观建设,运用α-多样性测度的方法,评价了高速公路互通区植物群落的乔木层和灌木层多样性状况。结果表明:宁淮高速公路植物种类较为丰富;被评价的5个互通区乔木层物种数少于灌木层,乔木层物种丰富度存在较大差异,灌木层的物种多样性指数Simp-son和Shannon-wiener变化幅度比乔木层大,物种丰富度等多样性指数较高,表现了很高的多样性和一致性;与同纬度自然植物群落相比,植物多样性较好,其平均值比较接近于落叶阔叶林性质。

Plant diversity is the foundation of ecological function of greenland system in expressways and the prerequisites of greenland landscape diversity, which also indicates the level of greening engineering. Applying the theory of plant diversity to the landscape projects on the Ninghuai expressway, this paper evaluates the diversity state of the arbor layer and shrub layer with the approach of α-diversity. It is found that the categories of plants are abundant; the arbor layer of the five interflowing areas evaluated is inferior to the shrub layer in plant species and there exists variations in species index; the variation index Simpson and Shannon-wiener in shrub layer is greater than in arbor layer. The diversity index in shrub green broadleaved forests.