淮南潘北矿塌陷湿地土壤退化评价

采煤带来的地面塌陷是极为重要的新生环境地质问题。以淮南潘北矿塌陷湿地为研究区域,其总氮(TN)含量平均水平为1.04g/kg,总磷(TP)含量平均水平为425mg/kg,在空间分布上均有从非季节性积水区向季节性积水区递减的趋势。土壤理化性质指标间总氮与有机质(SOM)含量呈极显著正向相关,与pH呈负向相关,与有效磷(AP)呈正向相关;总磷与有效磷表现为极显著相关;AP与有效钾(AK)、SOM都有很好的相关关系。通过应用相关分析和模糊数学的原理,以TN、TP、AP、AK和SOM等5个土壤肥力指标为基础,对该区域季节性积水区和非积水区土壤肥力进行数值化综合评价。季节性积水区IFI为0.463,非积水区IFI为 0.601,表明塌陷湿地形成后会加剧水域周边土壤的退化。

Assessment of Soil Degradation on Coal Mining Subsidence Wetland in Panbei Coal Mine

Coal mining subsidence is one kind of extremely important geological environment problems at present. The Soil properties in Huainan Paibei coal mining subsidence wetland where the concentrations of total nitrogen(TN) and total phosphorus(TP) were 1.04g/kg and 425mg/kg respectively were studied in this paper .The results showed that both TN and TP were less and less from non-seasonal to seasonal. Results indicated that total nitrogen was significantely correlated with both soil organic matter(SOM) and TP,and was negatively correlated with pH; available phosphorus(AP) was well correlated with TN,AP and available K(AK). Based on the correlation analysis and fuzzy mathematies,the integrated evalution of soil nutrient fertility was studied with five indexes,include TN, TP, AP, AK and SOM. The integrated fertility index of seasonal area and non- seasonal area were 0.463 and 0.601, respectively.It indicated that the quality of Panbei Subsidence wetland`s soil became worse and worse since formed.In other words, Soil degradation is going to deteriorate gradually in Huainan Paibei coal mining subsidence wetland.