Study On The Characteristics Of Habitat Succession And Its Evaluation Of Gangue Pile From Fuxin Mining Area

This dissertation takes the gangue pile which under the natural vegetation rehabilitation from Fuxin Mining Area as the study object, through field investigation, observation on the spot and lab analysis, from soil physical and chemical properties, hydrology characteristics, microclimatic characteristics, species diversity and so on, to system research the succession characteristics of the habitat to different slope directions and to different dumping years, and using the principal component analysis method (PCA) to comprehensive evaluate the habitat quality of the gangue pile for the first time, in order to offer scientific basis for the utilization and ecological restoration of the gangue pile. The result shows as following:(1) Succession of the soil physical properties. The profile characteristics of the gangue pile have three obvious layers: weathering surface layer, weakly weathering sub-surface layer and non-weathering layer, the transition is obvious, and the longer the dumping years, the thicker the weathering layer. The weathered material of gangue gets fine gradually with the increase of dumping years. The saturation moisture content, capillary moisture capacity and field moisture capacity increase with the increase of dumping years, the un-capillary porosity is opposite, which shows that the soil structure is improving. As the moisture condition of the shady slope is different from that of the sunny slope, which cause the different weathering and pedogenesis process of the gangue, leading to the parameters of moisture and capacity of sunny slope are lower than those of shady slope obviously. The soil bulk density decreases with the increase of dumping years, as the weathering speed of the sunny slope is lower, the value of soil bulk of the sunny slope is bigger than that of the shady slope with the same dumping year. The infiltration rate changes with the increase of time according with power format as i = at-b, and the accumulated infiltration capacity changes with the increase of time according with multinomial format...