关键词: 铁矿区, 模糊数学综合评价, 土壤环境质量, 重金属污染, 土壤养分

Abstract: The soil environmental quality of Liaoyang Gongchangling iron mine region was evaluated by fuzzy comprehensive method. The mining area was divided into seven typical areas rounded mining area and tailings pond， and the typical areas sampled separately. Meanwhile， contents of heavy metal Cd， Cu， Zn， Pb and Cr and soil nutrients （OM， TN， AN， TP and OP） were chosen as the main evaluation objects. Results show that Gongchangling iron mine region was seriously polluted by heavy metals， and Cd was the main pollution factor， followed by Cu and Cr. Pb and Zn showed the minimal effects on soil environmental quality. At the same time， the soil nutrients were abundant in mine region， but the AN， TP and AP， which can be quickly and efficiently utilized by plants， were poor. And the soils were not suitable for plant cultivation. Therefore， our attention were suggested to be focused on monitoring Cd contamination and making ecological restoration in time. Also， it should be noted that the fertilizer was necessary to regulate the soil nutrient structure before ecological restoration. This study provides scientific reference for the improvement and treatment of soil ecological environment in Gongchangling iron mine region.

Key words: Iron mine region, Fuzzy mathematics comprehensive evaluation, Soil environmental quality, Heavy metal pollution, Soil nutrients