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煤矸石复垦地土壤质量变化研究

             

摘要

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.%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。

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