不同南方籼稻品种对土壤锑的富集及其健康风险评估
Accumulation characteristics of soil antimony (Sb) by different Indica rice varieties and its health risk assessment in the southern areas of China
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摘要: 为探讨不同水稻品种对土壤锑（Sb）的富集能力，本文采用福建部分区域13个籼稻品种的稻米和对应的表层土壤样品（138对），研究了不同品种水稻对土壤Sb的富集能力和累积特征，并评估了稻米Sb对人类健康的潜在风险.结果表明，调查区域土壤Sb全量介于0.12—1.02 mg·kg-1，其中39.5%的土壤Sb全量高于福建土壤Sb的背景值；水稻不同部位Sb含量依次为：根 >> 叶 > 茎 > 糙米；不同水稻品种糙米中Sb含量介于2.2 μg·kg-1（宜优673）和14.6 μg·kg-1（Ⅱ优673）之间；水稻对土壤有效Sb的平均富集系数表现出明显的品种差异，常规稻（东联5号）和两系杂交稻（培杂泰丰、扬两优6号）的富集系数均处于中-低水平.风险评估结果表明，在未遭受Sb污染的农田上生产的籼稻稻米中的Sb不至于对人体健康构成危害.Abstract: In order to study the accumulation ability of soil Sb by different indica rice varieties, a total of 138rice grain samples of 13 indica rice varieties and the corresponding surface soil samples were collected from areas in Fujian Province. The accumulation factors and the potential risks of Sb in brown rice were assessed. The results showed that the total amount of Sb in soils ranged from 0.12-1.02 mg·kg-1, of which 39.5% was higher than the background value of Sb in Fujian soils. The Sb contents in different parts of rice decreased in the order of root>>leaf>stem>grain. The Sb concentration in brown rice varied between 2.2 μg·kg-1 (Yi-you 673) and 14.6 μg·kg-1(Ⅱ-You 673). The bioaccumulation factors (BAF) of brown rice based on the available soil Sb differed with rice varieties, of which the BAF of the conventional rice (Dong-lian 5) and the two-line hybrid rice (Pei-za-tai-feng and Yang-liang-you 6) were at the low and middle level. The risk assessment showed that the rice produced from the selected areas may not possess health risks to residents.
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Key words:
- antimony(Sb) /
- soil /
- rice /
- accumulation /
- health risk
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