中文摘要：

选取金安桥水电站2^#、3^#弃渣场不同部位土壤为研究对象,以其周边灌草地土壤作为参照,在土壤理化性质分析基础上,选定土壤质量评价指标,运用相关系数法确定评价指标的权重,对土壤质量进行定量评价与分析,以期为弃渣场的植被恢复提供理论依据。土壤理化性质分析结果表明,弃渣场土壤有机质、全氮、水解氮含量与周边灌草地土壤相比都相对较低;全磷、有效磷、全钾含量,弃渣场与灌草地无显著性差异;速效钾含量,2^#弃渣场与灌草地差异显著,3^#弃渣场与灌草地差异不显著;2弃渣场的土壤均为弱碱性土。土壤质量综合评价结果表明,2^#弃渣场的边坡中部〉平台〉边坡上部〉边坡下部,3^#弃渣场的平台〉边坡上部〉边坡中部〉边坡下部;弃渣场平台的土壤质量相对较好,边坡下部最差;弃渣场各个部位土壤质量均低于附近灌草地土壤质量,除2^#弃渣场边坡上部和3#弃渣场边坡下部表层土壤质量较下层差外,弃渣场不同部位上层土壤质量均优于下层土壤。

英文摘要：

In order to provide theoretical basis for vegetation restoration of abandoned dreg field,soils from different parts of No.2 and No.3 abandoned dreg fields in Jin′anqiao Hydropower Station were selected as the research objects,soils from the surrounding shrub-herb lands were used as the control.Based on the analysis of soil physical and chemical properties,indices for the soil assessment were determined and weighted by the correlation coefficient method to be used to evaluate analyze the soil quality.The results of analyses of the soil physical and chemical properties showed that the contents of soil organic matter,total nitrogen,and hydrolyzed nitrogen in abandoned dreg fields were relatively low compared with the soils from surrounding shrub-herb lands.However,differences in the contents of total phosphorus,available phosphorus,total potassium between those from shrub-herb land and abandoned dreg fields were not significant.Differences in the contents of available potassium between the soils from No.2 field and shrub-herb land was significant,but not significant between No.3 field and shrub-herb land.Soils from abandoned dreg fields were weak alkaline earth.The results of soil quality comprehensive evaluation showed that in No.2 field,soil from the middle part of the slope was the best,worst from slope bottom.In No.3 field,soil from the platform was the best,slope bottom was the worst.Soil quality of platform in two abandoned dreg fields was relatively good,surface layer was better than sub layer.In addition,soil quality of all parts of abandoned dreg fields was lower than the soil quality of shrub-herb land.The quality of upper soil was better than lower soil in different parts of abandoned dreg fields except for those from upper slope in No.2 field and slope bottom from No.3 field.