Characteristics of migration of main elements including Ca,Mg,Cu,Fe,Mn and Zn in soils under different geological backgrounds (limestone,dolomite,sandshale) in Maocun,Guilin,were studied.The results showed that the geochemical backgrounds of parent rocks had important effects on element migration in Karst soil systems.On the other hand,the correlation between the migration of above elements and plant transpiration were studied,exemplified by a typical plant Vitex negundo grown under different geological backgrounds.The results showed that the influence extent of plant transpiration on the migration and accumulation of these main elements varied with different geological backgrounds and different elements.Plant transpiration could promote the migration of the elements to some extent,such as Mn and Cu,which were more difficult to transfer in soils.Moreover,the influence extent of migration and accumulation of these microelements on plant absorption coefficient,varied significantly with different geological backgrounds.In karst mountain areas,the differences among different geological backgrounds should be considered when conducting vegetation restoration,and suitable plant species should be chosen according to the local conditions.