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为掌握北京公路两侧土壤pH分布特征,选取北京地区5条公路两侧124个采样点,利用国标方法对采集的土壤样品进行了pH测定。结果显示,八达岭高速路、京石高速公路以及京开高速路两侧土壤pH贴近背景值,无明显酸化迹象,而京通快速路以及机场高速路两侧土壤略低于背景值,出现某种程度的酸化趋势。通过分析酸性降水对土壤pH变化的影响,提出防止土壤酸化的建议。
In order to understand the characteristics of soil pH distribution on both sides of Beijing Highway, 124 sampling points on both sides of 5 roads in Beijing area were selected. The pH of the collected soil samples was measured by the national standard method. The results show that the soil pH near the expressway of Badaling Expressway, Jingshi Expressway and Jingkai Expressway is close to the background value without obvious signs of acidification. However, the soil on both sides of Jingtong Expressway and Airport Expressway is slightly below the background value, Degree of acidification trend. Based on the analysis of the influence of acid precipitation on the change of soil pH, the suggestion of preventing soil acidification was put forward.