半干旱区高速公路路域生态恢复工程植物多样性特征

针对半干旱区降水少、气候干燥、生态恢复困难等问题，以地处半干旱区的山东济青南线济南至莱芜高速公路为研究对象，通过路域生态植物实地调查与统计分析，可将路域植物种类数目排序为域外草本植物〉路域木本植物〉路域草本植物〉域外木本植物；根据不同路域区段的物种数、丰富度、多样性、信息量和均匀度等多种指数的统计、计算，结果表明路域草本植物变化程度较小、灌草植物均匀度和信息量都较高，中间路段植物综合丰富度较高，并且乔灌木的多样性受人为再造的影响较大。

Characteristics of Floristic Diversity in Eco-restoration Projects of Expressway Reach in Semi-arid Area

For some floristic diversities problems due to less rainfall and climate dry in a semi-arid area,as a subject of the expressway from Jinan to Laiwu reach located at Jiqing south expressway of Shandong Province,based on the results from the field investigation,amount of plant species in the reach can be ranked as grass outside expressway,tree and grass in reach and tree outside expressway in turn from high value to low value.According to the statistical results of some important indexes of floristic diversit...