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通过对沪(上海)陕(陕西)高速公路信阳至南阳段4种路基边坡的物种多样性指标和土壤特性进行测定,同时分析路基边坡物种多样性与土壤因子之间的相关性。结果表明:“紫穗槐+狗牙根+高羊茅”群落和“胡枝子+狗牙根+高羊茅”群落的物种多样性指数、丰富度指数及均匀度指数较高,物种多样性指标之间相关性显著。多样性指数、丰富度指数与土壤容重、孔隙度的相关性较强,均匀度指数与土壤容重、孔隙度的相关性较差;物种多样性指标与土壤硬度有一定的相关性,与土壤有机质含量相关性较小,与土壤抗冲性、土壤最大持水率相关性均较差。
The species diversity index and soil characteristics of four embankment slopes from Xinyang to Nanyang of Shanghai (Shaanxi) Expressway were measured, and the correlation between species diversity and soil factors was analyzed. The results showed that the species diversity index, richness index and evenness index of “Amorpha fruticosa + Bermudagrass + Tall Fescue” community and “Lespedeza bicornis + Bermudagrass + Tall Fescue” The correlation between diversity indicators is significant. The diversity index, richness index had strong correlation with soil bulk density and porosity, but the correlation between evenness index and soil bulk density and porosity was poor. Species diversity index had some correlation with soil hardness, and soil organic matter Content correlation is small, and soil impact resistance, soil maximum water retention rate are poor.