文献类型： 外文期刊
作者： Liang, Huang 1 ; Wang, Shan 1 ; Xu, Ping 3 ; Wang, Minyan 1 ; Liang, Peng 1 ; Wu, Shengchun 1 ; Zhang, Jin 4 ; Wong, Ming Hung 6 ;
作者机构： 1.Zhejiang A&F Univ, Sch Environm & Resource Sci, Hangzhou 311300, Peoples R China
2.Zhejiang Prov Key Lab Soil Contaminat & Bioremedia, Hangzhou 311300, Peoples R China
3.China Natl Rice Res Inst, Hangzhou 311401, Peoples R China
4.Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou 310023, Peoples R China
5.Neijiang Normal Univ, Sch Geog & Resource Sci, Neijiang 641100, Peoples R China
6.Educ Univ Hong Kong, Dept Sci & Environm Studies, Consortium Hlth Environm Educ & Res CHEER, Hong Kong, Peoples R China
关键词： Methylmercury; Moisture regulation; Aerobic rice cultivation; Mercury methylating bacteria; Rice rotation
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.2； 五年影响因子：6.3 ）
ISSN： 0147-6513
年卷期： 2024 年 283 卷
页码：
收录情况： SCI
摘要： The study explored the impact of water management on rice cultivation in mercury-contaminated paddy soil. The objective was to analyze the characteristics of mercury translocation by converting flooded soils to dry farming (non-flooded) to alleviate mercury accumulation in rice grains. The experiment was conducted over three consecutive rice-growing seasons, employing two distinct water management models: a continuously flooded rice cultivation mode and a flooded rice planting mode in the first season, followed by a non-flooded rice farming mode in the second and third seasons. The results showed that the change from flooded to non-flooded rice cultivation patterns presented extremely excellent environmental potential for inhibiting the uptake of both methylmercury and total mercury in rice. When transitioning from flooded cultivation to dry farming, the concentration of methylmercury and total mercury in the grains of non-flooded rice decreased by 87.15 % and 9.57 %, respectively, compared to that in the grains of flooded rice. In the third season, the methylmercury and total mercury in the grains of non-flooded rice decreased further by 95.03 % and 69.45 %, respectively. This study verified that the conversion of rice cultivation from flooded to non-flooded is an efficient strategy for suppressing the accumulation of methylmercury in rice grains, and it might offer a promising solution for managing soil mercury risks and ensuring the safety of rice for human consumption.
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