Research On Vegetation Selection And Utilization Of Mining Brownfield Based On Ecological Restoration Concept

To promote the vegetation restoration of the antimony mining area in Lengshuijiang,taken the area as research object,Selected 18 samples in the area and 8 samples in the non-mining area to conduct vegetation surveys.Used cluster analysis and selected suitable and tolerant plants.Then,the overall planning of the area was carried out,and based on the selected plant species,the planting model of ecological restoration area was proposed.Finally,benefits of vegetation restoration were analyzed from three aspects:ecology,society and economy.The research conclusions were as follows:Through vegetation survey and analysis,three levels of excellent,good,and general plants have been screened out.Excellent trees include:Ligustrum lucidum;Shrubs include:Buddleja lindleyana Fortune;Herb include:Artemisia argyi Levl.et Van.Good trees include:Paulownia;Shrubs include:Boehmeria nivea(L.)Gaudich;Herb include:Miscanthus.General trees include:Koelreuteria paniculata;Shrubs include:Photinia serrulata Lindl;Herb include:Pteris cretica L.var.nervosa(Thunb.)Ching et S.H.Wu.According to the resource distribution characteristics maked overall plan for the area.Divided the mine into 5 areas,include:Comprehensive Service Area,Mine Cultural Experience Area,Folk Culture Commercial Area,Ecological Forest Area,Ecological Restoration Area.Proposed many planting models for the ecological restoration area:4 planting modes in mountain forest areas;7 planting modes in the stadium area;3 planting modes in the lake area;3planting modes in the restoration area;2 planting modes in the characteristic landscape area.Estimated benefits of vegetation restoration:Absorbed antimony,arsenic,lead,and cadmium in the soil were:721.80kg、66.60kg、108.00kg、10.80kg each year.Absorbed(adsorbed)sulfur dioxide,nitrogen oxide and smoke in the atmosphere were:7978.50kg、540.00kg、909900.00kg each year.Conserved 6.50×10~5m~3 of water every year.It was estimated that the vegetation restoration in the area can produce a total benefit of RMB 60,292,800.