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对1982年采集本市农业土鉴76个样点进行铬、砷、氟、铜、锌、鎘、铅、汞的背景值调查。认为,本市农业土壤中鎘 ,锌、铅受到污染,主要集中在厂区附近耕地。提出应用占郊区耕地面积50%的粮作区作为土壤背景,其范围是:铭50.5 (46.9～54.1),砷9, 4 (8, 8—9, 9),氟479 (465～494),鎘0. 68 (0. 61 ～0. 75),铅31.0 <27.1～34.9),汞8,14 (0,11～0,17),用三种方法检验,表明获得的背景值符合实际。
A survey was conducted on the background values of chromium, arsenic, fluoride, copper, zinc, cadmium, lead and mercury collected from 76 sampling sites of agricultural soil in this city in 1982. It is believed that the pollution of cadmium, zinc and lead in agricultural soil in this Municipality is mainly concentrated in the arable land near the factory. It is proposed that the crop area, which accounts for 50% of the cultivated area in the suburbs, should be used as the soil background, with the ranges of Ming 50.5 (46.9-54.1), Arsenic 9-4 (8-8-9, 9), F 479 (465-494) Cd 0.68 (0.61 ~ 0.75), Pb 31.0 <27.1 ~ 34.9), and mercury 8,14 (0,11 ~ 0,17), which were tested by three methods, indicating that the obtained background value is in line with the actual situation.