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Responses of Melilotus officinalis Growth to the Composition of Different Topsoil Substitute Materials in the Reclamation of Open-Pit Mining Grassland Area in Inner Mongolia

机译:内蒙古露天矿区开垦中苜蓿生长对不同表层土壤替代物质组成的响应

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摘要

The purpose of this study was to reveal that reconstructed soil composed of different types and proportions of materials has different effects on the growth of , and to determine the most suitable formula of reconstructed soil materials to use for soil replacement. Using topsoil, coal gangue, fly ash, and rock and soil stripping materials from Shengli Mining Area of Inner Mongolia as raw materials, stratified and mixed pot experiments were carried out in a greenhouse using different proportions of each material. The differences in the aboveground biomass, leaf width, plant height, and root length of plants in pot experiments were then compared using analysis of variance. The results showed that using different combinations of materials in different proportions affected the growth status of , and their effects on biomass were greater than their effects on plant height, root length, and leaf width. When topsoil, coal gangue, and rock and soil stripping materials were mixed at a ratio of 3:3:4, respectively, the biomass of increased by nearly 30% compared with that of plants potted in pure topsoil. When the content of coal gangue was controlled to be 30%, the content of fly ash was below 10%, and the content of rock and soil stripping materials was below 40%, the reconstructed soil conditions clearly promoted the growth of . Coal gangue, rock and soil stripping materials, and fly ash can thus be used as substitutes for topsoil. Mixing soil reconstruction materials in the optimal proportion can solve the scarcity of topsoil in the grassland mining areas in the study region and, at the same time, can effectively improve the utilization of solid waste in this mining area.
机译:这项研究的目的是揭示由不同类型和比例的材料组成的重建土壤对土壤的生长有不同的影响,并确定最适合用于土壤置换的重建土壤材料的配方。以内蒙古胜利矿区的表土,煤石,粉煤灰和岩土剥离材料为原料,在温室中采用不同比例的每种材料进行分层和混合盆栽试验。然后使用方差分析比较盆栽实验中地上生物量,叶宽,植物高度和植物根长的差异。结果表明,使用不同比例的不同材料组合会影响的生长状况,其对生物量的影响大于对植物高度,根长和叶宽的影响。当表土,煤石,剥离岩石和土壤的物质分别以3:3:4的比例混合时,与盆栽在纯表土中的植物相比,生物量增加了近30%。当控制煤石含量为30%,粉煤灰含量低于10%,岩土剥离材料含量低于40%时,重建的土壤条件明显促进了煤of石的生长。煤gang石,岩石和土壤剥离材料以及粉煤灰因此可以用作表土的替代品。以最佳比例混合土壤重建材料可以解决研究区域草原矿区表土的稀缺性,同时可以有效提高该矿区固体废物的利用率。

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