Through the determination of soil physical and chemical properties and the major elements in soil water and rocks

the principal component multiple regression model was built to investigate the main influencing factors of major elements migration

and their contribution rates were calculated. The results showed that the Mg and Ca content at each soil monitoring points ranged 1 393.98 ~ 5 497.42 mg/kg

880.47 ~ 3 133.43 mg/kg respectively

which were higher than K and Na

i.e.

498.58 ~ 3 315.42

32.98 ~ 186.75 mg/kg

respectively. Soil CO2 concentration and soil temperature had the significant seasonal characteristics

which gave the higher values in summer and autumn than in winter and spring. Soil porosity decreased with the increasing depth

and the contents of HCO3- and Ca2+ in soil water were higher than other ions. The migration ability of main elements was Na > Ca > Mg > K

and the migration coefficients in summer of all elements were the highest. The factors with high contribution rate to major elements migration included precipitation

soil CO2 concentration

soil temperature and the content of anion in soil water

and their cumulative contribution rate reached up to 52.84% ~ 79.06%. The cumulative contribution rate of soil bulk density and the major elements content in soil and soil water was 22.98%

significantly lower than the aforementioned factors. The contribution rate of total soil porosity and aeration porosity were even lower

just 2.19% ~ 8.76%.