Evaluation of Soil Quality and Maize Growth in Different Profiles of Reclaimed Land with Coal Gangue Filling

Reclaiming subsidence and waterlogged zones caused by coal mining to maintain food feed supplies is an urgent issue in China. Utilizing gangue (CG) as a filling matrix construct different profiles of reclaimed land has downsides, e.g., due its low conservative capability water-fertilizer crop yield, lack quantitative evaluation soil quality, limiting factors growth. Quantifying the quality principal component analysis (PCA), obtaining key indicators, scoring system can clarify influence profile structure on productive ascertain optimal profile. Soil was evaluated minimum data set (MDS) index (SQI) obtained PCA seven plots constructed field with maize planting experiments. The agronomic traits were analyzed compared. result shows that pH value contributed highest surface SQI value. Maximal minimal 0.57 0.18, respectively, variation between reveals it increases increase thickness overburdens decreases interlayer depth land. based MDS correlation coefficient 0.4280 yield same sequence comprehensive growth plots. Agronomic are positively correlated nutrient SM soil, negatively pH, electrical conductivity (EC), total salt content (TS). Choosing thicker overburden control CG preceding effectively augment This study provides exploratory means scientific basis for management improvement reclamation.