Effects of the expressway on the soil-plant systems in the Longitudinal Range-Gorge Region

作为一个例子在纵的范围峡区域( LRGR )拿 Da-Bao 高速公路，沿着道路的三种土壤植物系统上的高速公路的效果被索引的七种类型分析，它是土壤营养素，土壤的重金属，土壤潮湿和土壤的 pH ，种植物和植物差异的滋养的、重金属。通过比较典型采样点和他们的通过对比区别的点，第一，单个索引上的高速公路的效果被分析并且讨论；第二，在高速公路之中的相互作用和各种索引与关联词分析被讨论；最后，三个系统上的效果的范围和紧张与灰色的相关分析被分析。所有结果显示出那 1 ) 在由高速公路的效果的范围以内，所有索引的表示的形式对高速公路的干扰不同。2 ) 高速公路能引起 HMS 和 HMP 的累积，特别在农田系统；并且带土壤的一点碱性化，特别在灌木系统。3 ) 高速公路是森林和灌木里的 HMS， SM， HMP 和 PD 的最重要的影响因素在农田系统的系统，而是仅仅 HMS 和 HMP。到与道路的不足道的关联的索引，高速公路通过系统的效果链间接地工作。与三种土壤植物系统作比较，效果主要在森林和农田系统里从高速公路专注于 10 m 的区域，并且在灌木系统上的 30 m 的区域上。

Taking Da-Bao expressway in the Longitudinal Range-Gorge Region （LRGR） as an example, the effects of the expressway on three kinds of soil-plant systems along the road are analyzed by seven types of indexes, which are soil nutrient, heavy metals of soil, soil moisture and pH of soil, plant nutrient, heavy metal of plant and plant diversity. Firstly, through comparing typical sampling points and their contradistinguished points, the effects of the expressway on single index is analyzed and discussed; sec- ondly, interactions among the expressway and all kinds of indexes are discussed with correlative analysis; finally, the range and intensity of effects on three systems are analyzed with gray related analysis. All results show that 1） within the range of effect by expressway, the forms of expression of all indexes are different to the interference of expressway. 2） Expressway can cause the accumulation of HMS and HMP, especially in the farmland system; and bring a little alkalization of the soil, especially in the shrub system. 3） Expressway is the most important influencing factor of HMS, SM, HMP and PD in the forest and shrub systems, but only HMS and HMP in the farmland system. To the indexes of in- significant correlation with road, expressway works indirectly through the effect chains of the system. Comparing with three kinds of soil-plant systems, effects mostly concentrate on the areas of 10 m from the expressway in the forest and farmland systems, and on the area of 30 m on the shrub system.