安徽省长江以北地区土壤水溶性氟含量及分布特征

采集安徽省长江以北地区有代表性土壤样品３４７个，测定了其水溶性氟含量。结果表明，土壤水溶性氟含量范围０３８～１２６９ｍｇ／ｋｇ，平均为２３８ｍｇ／ｋｇ。地区分布是南低北高，以淮北宿州和阜阳地区为最高，平均含量在３ｍｇ／ｋｇ以上。主要土壤类型土壤水溶性氟含量顺序是砂姜黑土、潮土＞黄棕壤、紫色土＞水稻土＞石灰土、粗骨土。不同母质土壤水溶性氟含量顺序是古黄土性河湖相沉积物＞黄泛冲积物＞紫色砂岩＞下蜀黄土＞石灰岩＞酸性结晶岩风化物＞河流冲积物。土壤水溶性氟含量与土壤ｐＨ呈正相关。ｐＨ高的黄泛冲积物和古黄土性河湖相沉积物母质土壤含水溶性氟多，该土壤地区发生氟中毒可能性较大。

Content and Distribution of Soluble Fluorine in Soils of the Middle and Northern Parts of Anhui Province.

representative soil samples were collected from the middle and northern parts of Anhui Province. The results of the soil sample test show that the contents of soluble fluorine in soils ranged from 0.38 mg/kg to 12.69 mg/kg, averaging 2.38 mg/kg. The soluble fluorine content in soil is higher in the south than in the north of the region. The test results show the following order of soil types as regard to the soluble fluorine contents from high to low: Shajiang dark soil, Yellow brown earth and Purple soil, Paddy soil, Limy soil. The test results also show the following order of soil parent materials as regard to the soluble fluorine contents from high to low: loess like sediment, Huanghe River alluvial deposit, Purple rock, Xiashu loess, Limestone, weathered acidic rock, river alluvial deposit. The contents of soluble fluorine in soil was found to be positively correlated with the pH values of the soils.