ZHAO Qingling, LI Qingcai

( Lunan Geo-Engineering Exploration Institute of Shandong Province, Yanzhou 272100, China )

Abstract: Southern district of Jining Region, Shandong Province, China is one famous production base for commodity grain, high quality garlic, rice and organic vegetables. It’s of great significance to investigate the relations of geochemical characteristics of soil with agricultural production and human health. Herein, 77 plowing layer soil samples were collected in southern Jining coal filed, and 26 indexes of the samples were detected including As, B, Cd, Co, Cr, Cu, F, Hg, Li, Mn, Mo, Ni, Pb, Sr, Se, Zn, S, OrgC, pH, SiO2, TFe2O3, MgO, CaO, Na2O, K2O, and CEC. According to statistic result, variable coefficients of geochemical index in southern Jining plowing layer soil were in the order of Hg> CEC> S>Cd> Na2O> Mo> CaO> OrgC> As> Mn> Cu> MgO> Co> Li> Ni> TFe2O3> Se> Zn> F> Cr> Pb> B> SiO2> Sr> K2O> pH. Results show that variable coefficients of Hg, CEC and S were all higher than 50% which was completely consistent with the frequency histogram and the comparison histogram of average and background value. On the basis of the results above, cause of plowing layer soil in southern Jining Region was meticulously analyzed with R factor analysis method. Four factors including combining factor of weathering and eluviation, combining factor of evaporation deposition and physicochemical adsorption of clay, plant rhizosphere accumulation factor and coal mining production factor were collected, and their contributions to the variance were 55.022%, 12.753%, 9.803% and 8.009%, respectively. These factors could be used to illustrate 85,578% of the cause of plowing layer soil in southern Jining Region. The result could lay the foundation for further soil environmental quality assessment and research on ecological balance.

Key words: geochemical characteristics; factor analysis; plowing layer soil; cause analysis; Jining

EARTH AND ENVIRONMENT Vol. 44, No.1 Tot No.309, 2016, Page 25-35