CHARACTERIZATION OF PLANT COMMUNITIES AND SOIL NUTRIENTS UNDER DIFFERENT RESTORATION MEASURES IN THE MANLALIANG COAL MINE DUMP IN ORDOS, CHINA

To study the effects of different restoration measures on the vegetation and soil of open-pit coal mine slopes, this paper takes the southern waste dump of Manlailiang coal mine as the experimental area, measures the plant community and soil nutrient indicators under three restoration measures: biological fence (BF), sand barrier (SB), and artificial strip sowing (AB).The impact of the three restoration measures on plant community characteristics and soil nutrient changes is analyzed, providing a theoretical and scientific foundation for ecological restoration of the waste dump.The research results indicate that (1) Compared with the control group, the soil organic matter was 12%-13% higher, the available potassium was 0.7%-1.4% higher, the alkali hydrolyzable nitrogen was 6.7%-14.44%higher than the sand barrier covering measure, and 33%-37.5% higher than the artificial strip sowing measure under the biological fence covering measure; (2) Under the biological fence coverage measures, the species diversity of the waste dump is superior to other measures; (3) The appearance of tall shrubs and semi shrubs in the sand barrier covering measures and biological fence covering measures indicates that the covering measures are more conducive to the growth of shrubs and semi shrubs.