Study on the Contents of Cu,Zn,Pb and Cd in Typical Vegetable Soil and Plant System in Hebei Province

According to the status of environmental pollution aggravating,heavy metals contents increasing in soil and vegetables in many areas,pollution exceeding standard and threatening the agricultural product quality safety,the heavy metals contents of typical vegetable soil and vegetables in Hebei Province were investigated.The results showed that the average contents of Cu,Zn,Pb and Cd in vegetable soil in Yongnian County were 30.40 mg/kg,97.26 mg/kg,45.40 mg/kg and 0.40 mg/kg,respectively,which met the national soil environmental quality standard for non-pollution vegetable production area.The average contents of Cu,Zn,Pb and Cd in edible part of vegetable were 0.55 mg/kg,3.59 mg/kg,0.058 mg/kg and 0.019 mg/kg(fresh weight),respectively,which did not exceed the related national food hygiene standard.Cu,Zn,Pb and Cd in soil were mainly in residual state,and the organic-bound form occupied the smallest proportion.