The Research On Heavy Metals Pollution Of Soil And Cropper In Typical Area Of Plain In The North Of Zhe Jiang Province

Resources and environment is the two key issues of the human survival and social development in 21st century. As industrialization and urbanization speeds up, the problem of environmental pollution have become increasingly prominent, the ecological environment has been an unprecedented vandalism. Since the outbreak of a series of environmental hazards incident in the middle of the last century, the potential ,and concealment of ecological harm is incalculable and threats the human health. Soil is an important component of ecological environment. unlike air and water pollution, soil pollution have invisible effects.Due to their cumulative, insidious,lag behind, and other characteristics, they have often been overlooked.Once been polluted, it would be difficult to repair governance . So the investigation,analysis and evaluation of soil pollution, have great significance.The paper select the rich agricultural resources of the Northern Zhejiang plain as a study area, located in the region of Shangyu, Shaoxing, Jiaxing Xinfeng County, Jiaxing City and the town of Sofu five typical regional sampling survey, aimed at analysis five areas of farmland soil and characteristics of situation the main crops of heavy metal contamination and pollution.Based on the value of statistical analysis about heavy metals in the soil in the five areas, finding heavy metals Cd, Cu, Hg, Zn most polluted in Shaoxing, following by the Shangyu. Through description of spatial variation about heavy metals in different regions soil, indicates that transport is a important sources of pollution by the heavy metals in soil; another through the soil profile at all levels of heavy metals in the comparative analysis, mainly heavy metals found in the soil surface enrichment, a "T"-type, individual profiles are middle- or under- convex type, the mainly influenced by soil rix matrices and maturity.Analysis the form of heavy metals in soil by the "seven-step", the results showing that Cd in soil gives priority ion-exchangeable form, large ecological hazards, Cu, Hg, Zn based residue form to the potential hazards of small; Through the form of heavy metals and the whole volume, soil texture, and other related analysis, gain different forms of heavy metal content of the main factors.Finally, study heavy metal enrichment coefficient content characteristics about crops in different parts researching, indicates heavy metals tend to crop roots in enrichment, except Hg; heavy metals in different forms have different roles in agricultural products of heavy metal content; Fortunately, the whole study area by agricultural pollution is light pollution or non-pollution, except individual samples exist Cd and Hg out of gauge, most rice samples do not belongs to the scope of pollution, consumption of relatively safe.