Experimental Study On The Effect Of Coal Soil On Soil Improvement And Vegetation Restoration Of Coal Gangue Hill

In order to conduct innovative research on the mode of soil improvement in indust rial and mining areas,the valuable industrial wastes will be fully utilized to further impr ove the soil level and surrounding environment in industrial and mining areas.Fuxin,thi s study selected the new high area industrial common coal waste soil as the research obj ect,the high and new zone gangue soil,plant ash,rice hull and other industrial and agri cultural waste,hybrid application,as a soil conditioner,and has the practical value of pl anting lavender,with coal gangue soil,plant ash,rice hull for quantitative,coal mud as a variable in different gradient,Through the analysis of the physical and chemical proper ties of the soil after the planting of lavender,the feasibility of coal soil to improve the soil on coal gangue was explored.Then the addition amount of coal soil was refined to find out the optimal addition amount and optimal ratio.Finally,lavender,alfalfa,green b ristlegrass,coreopsis and astragalus adsurgens,which are common in Xinqiu area,were s elected.Outdoor planting experiments were carried out to verify the above conclusions a nd determine the suitable plant species for reclamation on coal gangue in Xinqiu District.The main research conclusions are as follows:(1)In the study of planting lavender after adding different coal soil into the soil of coal gangue hill.When the addition amount of coal and soil was 0g,the moisture cont ent of soil was suitable for hardening and cracking phenomenon,but the indexes of solu ble salt ions,pH value,available nitrogen,available phosphorus and available potassiumwere all low.When the addition amount was 20g,40g and 100g,the soil was hardening and cracking,and the water content was low,but the soluble salt ions,pH value,available nitrogen,available phosphorus and available potassium were all increased to different degrees.When the addition amount of coal and soil was 60g and 80g,the phenomenon of soil consolidation and cracking decreased,the water content increased,and the soluble salt ions,pH value,available nitrogen,available phosphorus and available potassium all increased to a stable degree.The study proved the feasibility of coal soil as soil conditi oning agent,and determined the addition amount of coal soil is 50g-80g.(2)In the study of planting lavender after adding refined coal soil into the soil of coal gangue hill and vegetation ash and rice husk.The physical and chemical properties of the soil were all improved,meeting the requirements of plant growth.The optimal ad dition amount of coal and soil was determined to be 75g,and the optimal quality ratioof soil improvement was coal gangue soil: coal and soil: wood ash: rice husk = 100:15:6:4.(3)In the outdoor planting experiment of five plants,lavender,alfalfa,setaria,cosm osa and sandweed.It can be concluded that the plant species suitable for planting in Xin qiu District are as follows: lavender > coreopsis > alfalfa > astragalus adsurgens > gree n bristlegrass.The results of this study provide theoretical guidance for soil improvement and vegetation restoration in Xinqiu District.There are 17 pictures,30 tables and 87 references in this paper.