Effects of different types of vegetation restoration on physical and chemical properties of soil in mining wasteland:a case study of Jiaozuo Fengshan park

ZHAO Tongqian; ZHAO Yang; HE Yuxiao; XIAO Chunyan; Li Peng; WANG Cuilian

Abstract：In order to investigate the effects of different types of vegetation restoration on the soil physical and chemical properties of mine wasteland,five kinds of soils from different vegetation restoration types were investigated and compared with bare tail mine in Jiaozuo Fengshan park.The differences of soil physical and chemical properties under different vegetation restoration types were compared by single factor analysis of variance.The Pearson correlation coefficient was calculated and the soil quality of different vegetation restoration types was analyzed by principal component analysis.The results showed that:(1)vegetation restoration could effectively improve soil physical and chemical properties,and the improvements are related to vegetation types.(2)compared with bare tailings,soil organic matter and nutrient contents increased significantly.Soil organic matter content increased by 5.04~9.57 times,the total P content increased by 1.44~1.96 times,the total K content was about 1.76~1.92 times of the bare tailings,the total N content was about 1.56~2.11 times of the bare tailings,the available P content is 2.32~4.32 times that of the bare tailings.The soil organic matter and nutrient contents of different vegetation restoration types showed significant difference.(3)there was a significant positive correlation between soil total nitrogen and organic matter and ammonium nitrogen,and there was a certain correlation with nitrate nitrogen,indicating that soil nitrogen was mainly present in organic matter in the form of organic nitrogen.There was a significant positive correlation between soil organic matter and total N,total K and available K,indicating that soil organic matter had the same trend of increasing consumption.Besides,there was a good correlation between soil total potassium and other physical and chemical indexes,indicating that total potassium had obvious indication on soil nutrient content.In addition,there was a significant negative correlation between soil total nitrogen and pH and conductivity,indicating that soil salinization could lead to soil nitrogen deficiency.(4) the improvement effect of grassland on soil physical and chemical properties was the best,followed by evergreen coniferous forest,deciduous broad~leaved forest and shrub forest had little effect on soil improvement,and the effect of coniferous and broad~leaved mixed forest on soil is not obvious.