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《Journal of Fujian Agriculture and Forestry University(Natural Science Edition)》 2006-02
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Estimation of the accumulation of cadmium and lead by 14 vegetables from soils

SU Miao-yu,LUO Dan,CHEN Yan-hui,GAO Shu-fang,WANG Guo (College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China)  
Accumulation of 14 vegetables of Cd and Pb from soils and its evaluation method were studied based on the data of field-collected soil and vegetable samples.The results showed that the transfer factors based on both total(TF_(total)) and those based on DTPA-extractable(TF_(DTPA)) Cd and Pb in the soils decreased with the increase of soil Cd or Pb(both total and DTPA-extractable).The TF_(DTPA) is better than TF_(total) in evaluating the accumulation ability of the vegetables for Cd and Pb.The representative transfer factor for a given crop-Cd(or Pb) system should be evaluated based on the regression equations between the transfer factors and the corresponding soil Cd and Pb and at a given soil Cd or Pb concentration.Arthritic mean,geographic mean and median of a group of data are not good indicators for the accumulation for a crop-Cd(or Pb) system.The representative TF_(DTPA) values of the vegetables for Cd and Pb were evaluated at DTPA-extractable Cd=0.1 mg·kg~(-1) and DTPA-extractable Pb=25 mg·kg~(1),respectively.The TF_(DTPA) values of the vegetables for Cd varied from 0.01 to 0.38,and those for Pb varied from 0.0005 to 0.0063.It was shown that water spinach was the strogest in accumulating Cd and Pb,whereas bottle gourd was the weakest.The TF_(DTPA 0.[KG-8]1) values of water spinach for Cd and Pb were 38 and 12 times higher than those of bottle gourd.
【Fund】: 福建省科技厅重点科技资助项目(2003Y026);; 福建省环保局重点科技项目
【CateGory Index】: X173
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