title: Characteristics of heavy metal transfer and their influencing factors in different soil-crop systems of the industrialization region, China.
abstract: Soil heavy metals and their bioaccumulation in agricultural products have attracted widespread concerns, yet the transfer and accumulation characteristics of heavy metals in different soil-crop systems was rarely investigated. Soil and crop samples were collected from the typical agricultural areas in the Yangtze River Delta region, China. The concentrations of Cu, Pb, Zn, Cd and Hg in the soils, roots and grains of rice (Oryza Sativa L.), wheat (Triticum L.) and canola (Brassica napus L.) were determined in this study. Transfer ability of heavy metals in soil-rice system was stronger than those in soil-wheat and soil-canola systems. The wheat showed a strong capacity to transfer Zn, Cu and Cd from root to the grain while canola presented a restricting effect to the intake of Cu and Cd. Soil pH and total organic matter were major factors influencing metal transfer from soil to rice, whereas soil Al2O3 contents presented a negative effect on heavy metal mobility in wheat and canola cultivation systems. The concentration of Zn and Cd in crop grains could well predicted according to the stepwise multiple linear regression models, which could help to quantitatively evaluate the ecologic risk of heavy metal accumulation in crops in the study area.
authors.affiliation: Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China. Electronic address: yxy_hjy@hhu.edu.cn.
authors.forename: Xuyin
authors.initials: X
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
authors.forename: Tianyuan
authors.initials: T
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
authors.forename: Sun
authors.initials: S
authors.lastname: Hu
authors.affiliation: School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Ji
authors.affiliation: School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
mesh_terms: D029688:Brassica napus / Q000737:chemistry; D002681:China; D018556:Crops, Agricultural / Q000737:chemistry*; D000067896:Industrial Development; D019216:Metals, Heavy / Q000032:analysis*; D012275:Oryza / Q000737:chemistry; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014908:Triticum / Q000737:chemistry
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants
keywords: Accumulation; Heavy metals; Multiple linear regression model; Soil–crop system; Transfer