矿物肥料对露天矿排土场土壤水分入渗的影响

Effects of mineral fertilizers on soil water infiltration of dump of open pit

为了加快矿山废弃地土地复垦进程,采用野外取土样和室内分析相结合的方法,研究了矿物肥料对露天矿排土场土壤水分入渗的影响。结果表明,对照地、草炭、沸石和粉煤灰达到稳渗时间分别为60min、100min、90min和70min;初渗率、平均入渗率和稳定入渗率表现为草炭>沸石>粉煤灰>对照;粉粒含量与初渗率呈显著正相关,初渗率、平均入渗率、稳定入渗率与容重呈负幂函数关系,与总孔隙度呈正幂函数关系,与非毛管孔隙度呈正幂函数关系,而与毛管孔隙度无关系。该研究可为加快排土场等矿山废弃地的生态恢复与重建提供理论依据。

In order to speed up the reclamation of abandoned land at a coal mine, a study on how the mineral fertilizers affects the soil water infiltration at an open-pit dump. The study shows that contrast land, peat, zeolite and fly ash have achieved a steady infiltration time for 60, 100, 90 and 70 minutes respectively. The initial infiltration rate, the average infiltration rate and the stable infiltration rate for each material show a clear relationship, i.e., peat 〉 zeolite 〉 fly ash 〉 contrast land. The silt content and the initial infiltration rate are positively correlated. The initial infiltration rate, the average infiltration rate and the stable infiltration rate have a negative power function relationship with bulk density, a positive power function relationship with the total porosity, a positive power function relationship with non-capillary porosity, and no correlation with capillary porosity.