煤矸石复垦地土壤质量变化研究

为检验煤矸石复垦地复垦效果，选取16个参数作为复垦土壤肥力质量评价的因子，建立考虑微量元素的肥力质量评价体系，应用相关系数法确定土壤肥力因子的权重大小，并结合模糊数学原理计算土壤肥力评价因子的隶属度值，运用模糊综合评价法对复垦土壤质量进行评价，结果表明：复垦地与正常农田土壤肥力综合指标值均随深度的增加而降低。复垦土壤的质量在3年内得到了逐步的提高，耕作制度、施肥对表层土壤质量的提高有很大影响。复垦区土壤肥力略低于正常农田，复垦3年时，各层次复垦土壤肥力由上到下分别为正常农田对应层次的91．9％、89．6％、84．6％，表明复垦土壤质量已达到正常农田的90％左右，复垦取得良好的效果。

A study on change in soil quality of the land reclaimed with coal gangue

To check the result of land reclamation with coal gangue, this paper chose 16 parameters for appraising re- claimed land fertility quality, established a quality appraisal system taking trace elements into consideration, applied cor- relation coefficient method to determination of weight of each factor in soil fertility quality appraisal, calculated mem- bership value of each factor using fuzzy mathematics principle and performed fuzzy integrated appraisal. The results in- dicated that the reclaimed land and normal farmland both show decreasing soil fertility index values with depth. Re- claimed land soil quality will be improved gradually in 3 years,and both farming system and fertilizer application have great effect on topsoil quality improvement. Reclaimed land soil fertility is a bit lower than normal farmland. After 3 years of reclamation, the fertility of each layer of reclaimed soil equals to 91.9%,89.6% and 84.6% of the counterpart of normal farmland, suggesting that reclaimed soil quality reaches up to 90% of that for normal farmland.