Abstract:In the present study, the effects of slope aspect, slope position, and succession years on soil physical, chemical and biological properties in opencast coalmine dumps in Fuxin city were analyzed, and changes of soil quality in the progress of vegetation restoration of the dump slopes were explored using the method of soil quality index. The results showed that the soil water, organic matter, available nitrogen and phosphorus content, pH value, and urease, alkaline phosphatase and invertase activities increased from upper part to lower part of slope. The values of soil water content, water-stable aggregates content, alkaline phosphatase, catalase and invertase activities were higher on the shady slope than on the sunny slope after 10 years restoration. With the succession years increase, the soil water-stable aggregates and available phosphorus content, and alkaline phosphatase activity on the shady slope gradually increased, but the soil pH value, and available nitrogen content, urease and catalase activities on the sunny slope gradually declined. The soil quality was higher on the shady than sunny slope, but decreased in the order of lower part> middle part > upper part. With the succession years increase, soil quality increased on the shady slope and at the upper and middle part of sunny slope, while it declined at lower part of sunny slope. These results indicated that slope aspect and slope position played a critical role in soil quality on the slope of coalmine dumps. Therefore, in order to reclaim successfully the slope of coalmine dumps in Fuxin city, different restoration measures should be carried out based on different characteristics of habitat.
王凯, 张亮, 刘锋, 王道涵, 宋子岭. 阜新露天煤矿排土场边坡土壤质量分异特征[J]. 中国环境科学, 2015, 35(7): 2119-2128.
WANG Kai, ZHANG Liang, LIU Feng, WANG Dao-Han, SONG Zi-Ling. Soil quality variability on dump slopes of opencast coalmine in Fuxin. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(7): 2119-2128.