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[1]LIU Xiaoyang,ZHOU Wei,BAI Zhongke,et al.Influences of Reclamation Types and Microtopography on Soil Nutrient in Opencast Coal Mine Dump of Pingshuo Mining Area[J].Research of Soil and Water Conservation,2016,23(03):6-12.

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Influences of Reclamation Types and Microtopography on Soil Nutrient in Opencast Coal Mine Dump of Pingshuo Mining Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 03 Page number: 6-12 Column: Public date: 2016-06-28

Title:: Influences of Reclamation Types and Microtopography on Soil Nutrient in Opencast Coal Mine Dump of Pingshuo Mining Area

Author(s):: LIU Xiaoyang¹, ZHOU Wei^1,2, BAI Zhongke^1,2, YANG Ke^1,3,4; 1. China University of Geosciences(Beijing), Beijing 100083, China;
2. Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Land and Resources, Beijing 100083, China;
3. Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth’s Critical Zone, Chinese Academy of Geological Sciences, Langfang, Hebei 065000, China;
4. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, Hebei 065000, China

Keywords:: opencast coal mine; mine dump; land reclamation; soil nutrient; reclamation type; microtopography

CLC:: S158.3

DOI:: -

Abstract:: Study of the impacts of reclamation type and microtopography on soil nutrient is helpful to guide the executive of land reclamation, and it also has great significance with respect to both theory and execution for controlling soil erosion of reclaimed land. Selecting the reclaimed land in Pingshuo opencast coal mine dump as the study area, we estimate the effects of reclamation types and the microtopographic factors (elevation, slope, aspect) on soil organic carbon, total nitrogen, total phosphorus, available phosphorus and available potassium using mathematical statistics method. The results show that: (1) reclamation types have the significant effect on the soil nutrient contents in different reclamation types, the contents of soil nutrients decrease in the order: farmland > woodland > grassland, the contents of soil organic carbon, total nitrogen, total phosphorus and available potassium in farmland are 2.15～2.68 times of the grassland, are 1.48～1.78 times as much as woodland. Content of available phosphorus in farmland is 71.24 mg/kg, being 11 times of grassland, 4 times of woodland; (2) there is a significant correlation between slope steepness and soil nutrient content at 0.05 level, while elevation and aspect have weaker correlation with soil nutrients, suggesting that soil nutrients are greatly influenced by slope, but the influence of elevation and slope direction is small; (3) the interaction between reclamation types and slope has effect on soil nutrient to certain extent, with the same reclamation type, soil nutrient content differs in different slopes, the farmland slope’s increase leads to the decrease of soil nutrient content; with the same slope, different reclamation types have significant differences in soil nutrient contents, the general trend of soil nutrient content follows the order: farmland > woodland > grassland.

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