Comparative analysis of soil trace elements in different land use types in Xiaojiang river basin,Yunnan

In this paper, the spatial interpolation, variance analysis and correlation analysis of trace elements in different land use types (cultivated land, woodland, garden land, construction land, bare land) in Xiaojiang river basin of Yunnan Province are studied, and the distribution and migration of trace elements in different land use types are discussed. The results showed that:(1) the contents of Cu, Mn, Ni and Zn in the soil of Xiaojiang river basin were generally high, except for the low content of Mo. (2)The contents of five soil trace elements in different land use types had obvious differences, of which the content of trace elements in garden land was the highest; (3) The degree of variation is moderately variable in all five trace elements. (4)The spatial distributions of Cu, Mn, Mo, Ni, and Zn have certain similarities.The high value areas were mainly concentrated in the right side of karst valley area with lower elevation and the pelvic floor sedimentary dam, where the main soil type is carbonate red soil; while the low value areas were concentrated in the left side of karst valley area with higher elevation, and high mountain karst areas,where the main soil type is clastic rock..In all, landscapes, soil parent rock and human activities are important factors affecting the distribution and migration of soil trace elements in the study area.