›› 2018, Vol. 30 ›› Issue (5): 695-701.DOI: 10.3969/j.issn.1004-1524.2018.05.03

• Crop Science • Previous Articles     Next Articles

Cadmium uptake characteristics of different rice cultivars

MAO Yaxi1,2, FU Jianrong2,*, MA Junwei2, ZOU Ping2, LEI Tinghai2, LI Huan2, LI Yuanwei2, HUANG Yixiao2, WANG Lingli2   

  1. 1. School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China;;
    2. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2017-08-07 Online:2018-05-20 Published:2018-05-23

Abstract: The cadmium (Cd) absorption and accumulation characteristics of four rice varieties, i.e. Yongyou 538, Chunyou 84, Jiahe 218 and Xiushui 134 were studied by Cd stress experiment in paddy fields in Shaoxing, Ninghai and Wenling, Zhejiang Province. It was shown that four rice varieties possessed Cd low accumulation characteristics in rice grain. When Cd concentration in rice grain in Yongyou 538, Chunyou 84, Jiahe 218 and Xiushui 134 was above 0.2 mg·kg-1, the corresponding soil Cd concentrations in treatments were >1.41, 1.41, 0.91, 0.52 mg·kg-1, respectively. The linear regression equation could be used to fit the relationship between Cd content in rice grain and the total Cd concentration in paddy soils. Under rice safe production, the order of the threshold value of the Cd concentration in paddy soil of four rice varieties was as Yongyou 538>Chunyou 84>Jiahe 218>Xiushui 134, and the order of the threshold value of the Cd concentration in paddy soil of different soil types was as clay degleyic paddy soil>tidal mud percolating paddy soil>tital mud redoximorphic paddy soil. In this study, the critical value of soil Cd concentration under rice safe production was higher than that of the current national soil environmental quality standard (GB 15618—1995).

Key words: agro-products safety, heavy metal, variety, rice

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