Vegetation Restoration Of Baorixile Open Pit Coal Mine And Its Impact On Natural Grassland

Shen Hua Baorixile Open Pit Mine which is a national large coal enterprises,located in the center of Hulun Buir grassland.The dumping ground formed by the stripping material has caused serious adverse effects on the grassland environment and ecological landscape,in the process of coal mining,and the vegetation survey was conducted within 3 km north of the mine field in Baorixile Open Pit Mine area and the control area where 20 km away from the test site.One method of field investigation based on lager and permanent plots,The index of species importance,Margalef index,Simpson index,Shannon-Weiner index and Pielou index were used for comparative analysis,and discussed the plant diversity of herbaceous plant communities.Try to find out the range boundary of the surrounding vegetation,In order to provide scientific data analysis and theoretical support for the restoration work and ecological restoration around the mining area.The results are as follows:(1)According to the analysis of species composition,78 species of herbaceous plants were found in the top of the northern dump,the west slope of the northern dump and the three kilometers outside the north of the dump,It belonged to 16 families and 45 genera,mainly composed of Compositae,gramineae and Rosaceae;There are 44 species of herbaceous plants belonging to 14 families and 32 genera in the non interference control area,composed of Compositae,Gramineae and Leguminosae.In addition,it is mainly composed of drought-borne and xerophytic plants.In terms of life structure,perennial herbs have a distinct advantage in quantity.(2)The species richness index and species richness index of BC and BPD were the highest in two plots.BT plots are at a low level,species richness index is low,BPP and plots are the least,and species richness index is the lowest.It indicates that species richness index is positively correlated with species number.In terms of important values,the greater the proportion of dominant species in the dominant proportion,the more uneven the plant distribution.(3)Low slope plants with low importance value and serious recession.The high value of artificial intervention on the top of the slope was higher than that in the non interference control area.In the diversity index,the BC species diversity index is the highest and the distribution is the most homogeneous.