关键词: 水稻籽粒, 品种差异, 重金属, 累积特征

Abstract: In order to study the difference of Cd, Zn and As accumulation in different cultivated variety rice. 316 rice cultivars varieties cultivated in a heavy metal polluted paddy field which located in a mine zone of northern Guangdong Province in 2014. The results showed that: The average values of Pb, As and Cd in traditional rice were as follows: 0.290 mg/kg, 0.060 mg/kg and 0.144 mg/kg. The contents of Pb, As and Cd in hybrid rice were as follows: 0.237 mg/kg, 0.044 mg/kg and 0.132 mg/kg. The content of heavy metals in traditional rice was higher than that in hybrid rice. The transfer ability of husk to rice was Cd>As>Pb. The strains of Yinzhan, Meixiangzhan and Shenliangyou had greater abilities to enrich Cd than other strains. The Shenyou strains had the weakest capacities to absorb Cd and Pb. The absorption of As and Cd in traditional rice was antagonistic, but the absorption of Pb and Cd in hybrid rice was synergistic. Therefore, according to the difference of heavy metal accumulation in different genotypes of rice, it is feasible to screen out the rice varieties of low accumulation of heavy metals.

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