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| Heavy metal content and accumulation characteristics in the edible parts of different crops under Cd, Hg, and Pb stress |
| Received:February 26, 2017 |
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| KeyWord:farmland soil;heavy metal content;agricultural products;Accumulation characteristics;safety assessment |
| Author Name | Affiliation | E-mail | | JIAO Wei-xiong | College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070, China | | | YANG Hu-de | College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070, China
Institute of Soil, Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China | 596259707@qq.com | | FENG Dan-ni | Institute of Soil, Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China | | | LIN Da-song | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LI Chong-xiao | Gansu Agricultural Ecological Environment Protection Management Station, Lanzhou 730000, China | |
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| Abstract: |
| The test method of micro area soil cultivation was used in this research to investigate absorption and accumulation ability of heavy metals in the edible parts of 10 common types of cultivated crops, including three main crop classes, planted in soil heavily polluted by Cd, Hg, or Pb. Furthermore, the quality and safety of agricultural products were evaluated using a single factor index method, according to National food safety standard of China(GB 2762-2012). The results showed that there were significant differences in the absorption capacity of different types of heavy metals in different crops. The trend of accumulation ability of Cd showed as vegetables > oil crops > food crops; for Hg and Pb, it was vegetables > food crops > oil crops. The absorption ability of the same crop(except corn and soybean) for different heavy metals was in the order of Cd > Pb > Hg. This comprehensive evaluation suggested that corn was preferable for Cd-polluted farmland, corn and rapeseed for Hg-polluted farmland, and corn and soybeans for Pb-polluted farmland. This information is helpful for adjusting the crop planting structure in Gansu Province. |
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