Study on weathering material total nutrient content of coal gangue in fuxin mining area

The weathering material total nutrient content of gangue pile increased with the increase of dumping years.In addition to the kalium content of plot B,the total nutrient content of surface layer was bigger than sub-surface layer,and shady slope was better than sunny slope.The nitrogen content growth trend of surface layer at shady slope and sunny slope had two stages,increased slowly first,then accumulated quickly.The nitrogen content of plot A of 25～40 dumping years at shady slope surface layer increased 81.6%.The sub-surface layer at shady slope increased contrarily.The phosphorus content increased smaller,and less than farmland.Plot B and plot C no had difference.The kalium content was higher than the nitrogen content and the phosphorus content.Compared with farm,the kalium content differed greatly,beside plot D at shady slope and plot B sub-surface layer at sunny slope.