Study on the Screening of Reconstructed Soil Ratio Based on Entropy Weight-VIKOR Method
Land reclamation is very important for vegetation restoration in mining areas.Reconstructed soil can effectively solve the problem of scarcity of topsoil resources.In response to the problem of poor soil and difficulty in achieving resource utilization of a large amount of gangue in a certain mining area's dumping site,by mixing coal gangue ecological aggregate with surface soil in different proportions,five kinds of reconstructed soil were prepared.The pH,organic matter,total nitrogen,available phosphorus and available potassium content of reconstructed soil under different treatment schemes were measured.And the influence of coal gangue ecological aggregate ratio on each index was analyzed.Based on the entropy weight-VIKOR evaluation method,the optimal ratio of coal gangue ecological aggregate to surface soil was selected.The results show that with the increase of the proportion of coal gangue ecological aggregate,the pH of reconstructed soil gradually decreases and approaches to neutral.The proportion of coal gangue ecological aggregate has a significant effect on the content of organic matter,total nitrogen and available potassium,but has no significant effect on the content of available phosphorus.With the increase of the proportion of coal gangue ecological aggregate,the contents of organic matter,total nitrogen and available potassium in different reconstructed soil show a downward trend,and the content of available phosphorus increases first and then decreases.The scheme with 30％coal gangue ecological aggregate and 70％surface soil is the optimal ratio.The research results can provide new ideas for solving the problems of poor soil,scarce surface soil and difficult land reclamation in mining dumps.
万方数据
维普
