马钢姑山矿业公司钟山排土场复垦效果分析

Analysis of Reclamation Effect of Zhongshan Dump of Masteel Gushan Mining Company

为掌握马钢姑山矿业公司钟山排土场的复垦效果,对该排土场复垦前的地表土壤、盆栽试验基质、复垦后的地表土壤及所栽种植物进行了营养元素含量及重金属含量的检测分析。结果表明:钟山排土场复垦土地中速效氮含量偏低,后续复垦工作中应增加氮肥的施用量或广泛种植固氮植物;钟山排土场原地表物质重金属含量超标,虽然在原地表覆盖客土能使植物较好地生长,但随着复垦年限的增长,复垦土地产出的农产品由于重金属的迁移作用,其重金属含量超过了相关国家标准的要求,因此后续复垦工作中应着重解决重金属迁移的问题。

In order to grasp the reclamation effect of the Zhongshan dump of Masteel Gushan Mining Company,the nutrients content and the heavy metals content in the surface soil before dump reclamation,the experiment potting soil matrix,the soil surface after reclamation and the plants were checked and analyzed.The results showed that the readily available nitrogen in land reclamation of Zhongshan dump was low,and the nitrogen fertilizer should be increased in following rehabilitation,or the nitrogen-fixing plants are widely planted.Although the heavy metal content in the original surface of Zhongshan dump exceeded the standard,the plants can grow up well.With the increase of land reclamation,the heavy metal content in agricultural land productivity exceeded the relative national standard since the heavy metals migrate from the soil into the plant.Therefore,to solve the migration of heavy metals should be focused at the following land reclamation.