污灌区农田土壤环境质量评价

Assessment on Soil Environmental Quality of Sewage Irrigation Region

分别利用主成分分析法和内梅罗污染指数法对取自鞍山的6种不同类型农田(弃耕地、旱田、菜田、大棚、污灌稻田和清灌稻田)的土壤环境质量进行评价.结果表明,农田种植和灌溉方式的不同会在区域农田土壤污染物含量和土壤环境质量上表现出较明显的差异性.6种类型农田中,弃耕地的土壤环境质量最好,以下依次是菜田、旱田、清灌稻田和大棚,污灌稻田的土壤环境质量最差.利用内梅罗污染指数法和主成分分析法对6种类型农田土壤的评价结果基本一致,除菜田和旱田的排序结果略有不同外,对其他4种类型农田土壤环境质量的评价结果完全一致.主成分分析法可以用于土壤环境质量评价和土壤污染物的定量化识别.

The soil environment of 6 types of agricultural fields （abandoned field, dry farming field, vegetable field, greenhouse, paddy field, and sewage irrigated paddy field） of Anshan City was assessed with principle component analysis （PCA） and Nemerow index methods, separately. The result indicates that the style of planting and irrigation can make clear discrepancy in soil contamination and environmental quality of agricultural fields. Among 6 types of fields, the soil environment of abandoned field is the best, and then are vegetation field, dry farming field, paddy field and greenhouse in turn. The sewage-irrigated paddy field is the worst. The assessment results of PCA and Nemerow index methods are basically consistent to 4 out of 6 types of fields, except vegetable and dry farming with little difference. The result implied that the method of PCA can be used in soil environmental assessment and quantitative identification of soil contamination.