南海市农业土壤中的重金属

Heavy Metal in Agriculture Soils in Nanhai City

农业土壤中的重金属含量异常会影响作物生长和农产品质量，从而影响人体健康．南海市污染型工业企业遍布城乡各地，农业环境受到不同程度的影响．本文探讨农业土壤中重金属元素铜、铅、锌、镉、铬。

Heavy metal may be harmful to crops when its content in soils goes beyond the normal level.In this paper,discussion on content of Cu,Pb,Zn,Cd,Cr,Ni in agriculture soils in Nanhai city was presented.The content of heavy metal in agriculture soils is controlled by a series of factors such as irrigation of field with waste water,soil parent material,soil property,etc.The content of heavey metal in the southern and eastern regions of Nanhai city is more higher than in the northern and western part.