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首页> 外文期刊>Land Degradation and Development >Organic amendments and mulches modify soil porosity and infiltration in semiarid mine soils
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Organic amendments and mulches modify soil porosity and infiltration in semiarid mine soils

机译：有机修正和覆盖物改性半干旱矿井土壤孔隙率和渗透

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The restoration of soils affected by mining activities depends on the improvement of soil physical quality. This study aimed to determine the medium-term effects of organic amendments and mulches on soil physical properties and soil hydrological response. The experimental restoration was conducted in a homogeneous slope using a factorial design (organic amendmentsxmulches). The organic amendments consisted of compost from domestic organic residues, sewage sludge from an urban water treatment facility, and a control without amendment. The mulches consisted of gravel, woodchips, and a control without mulch. Modifications of the soil structure induced by the combinations of techniques were quantified by micromorphometric analysis of 2D porosity. Undisturbed soil cores were collected to determine the soil bulk density. Soil hydrological behaviour was determined by rainfall simulations. Samples from natural undisturbed soils surrounding the quarry were also taken as a reference. Restored soils with organic amendments have a higher total porosity than did nonamended substrates. Each restoration treatment combination resulted in a different pore system with very diverse hydrological responses. Organic amendments resulted in infiltration improvement and water erosion reduction. The woodchip mulch was more effective at trapping runoff and sediment, although this type of mulch did not favour vertical water movement towards deeper horizons. Therefore, the use of organic amendments should be encouraged in mine soil restoration and should be strongly recommended for its proven environmental benefits (enhancement of soil structure and infiltration and reduction of soil losses). However, the mulches did not produce the expected results in the tested arid-semiarid area.
机译：受采矿活动影响的土壤的恢复取决于土壤体质的改善。本研究旨在确定有机修正和覆盖物对土壤物理性质和土壤水文反应的中期影响。使用因子设计（有机术语Xmulches）在均匀斜坡中进行实验修复。有机修正案由国内有机残留物，来自城市水处理设施的污水污泥以及无需修正的控制组成。覆盖物由砾石，木片和没有覆盖的控制组成。通过2D孔隙率的微观分析量化技术组合诱导的土壤结构的修饰。收集未受干扰的土壤核心以确定土壤堆积密度。土壤水文行为由降雨模拟确定。来自采石场的自然未受干燥的土壤的样品也被视为参考。恢复有机修正的土壤具有比不加重的基材更高的总孔隙率。每种恢复治疗组合导致具有非常多样化的水文反应的不同孔系统。有机修正导致渗透改善和水蚀减少。木片覆盖在捕获径流和沉积物时更有效，尽管这种类型的覆盖物不赞成垂直水朝向更深的视野。因此，应在矿井土壤恢复中鼓励使用有机修正，并应强烈推荐其经过验证的环境效益（提高土壤结构和渗透和土壤损失的减少）。然而，覆盖物没有在测试的干旱半干旱区域中产生预期结果。

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