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Application of inorganic passivators reduced Cd contents in brown rice in oilseed rape-rice rotation under Cd contaminated soil

文献类型： 外文期刊

作者： Huang, Suihua 1 ; Rao, Gangshun 1 ; Ashraf, Umair 1 ; He, Longxin 1 ; Zhang, Zezhu 1 ; Zhang, Huailin 1 ; Mo, Zhaowen; 1 ;

作者机构： 1.South China Agr Univ, Coll Agr, Dept Crop Sci & Technol, Guangzhou 510642, Peoples R China

2.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Peoples R China

3.Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China

4.Univ Educ, Dept Bot, Div Sci & Technol, Lahore 54770, Punjab, Pakistan

关键词： Antioxidants; Brown rice; Oilseed rape-rice rotation; Heavy metals; Passivators

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2020 年 259 卷

页码：

收录情况： SCI

摘要： Immobilization of heavy metals by the application of chemical amendments is an eco-friendly, economical and effective method to remediate cadmium (Cd) -contaminated soils. Field experiments were conducted during 2016-2018 following oilseed rape-rice rotation with the application of inorganic passivators i.e., slaked lime (CaOH2>95%) and sepiolite (SiO2>50%, MgO>20%). The experimental treatments were comprised of: rice planting in winter fallow and without passivator (F-PA0); fallow with slaked lime (F-PA1); fallow with sepiolite (F-PA2); oilseed rapeerice rotation without passivator (R-PA0); rotation with slaked lime (R-PA1); and rotation with sepiolite (R-PA2). The slaked lime and sepiolite were applied after the harvest of rape at 2000 and 5000 kg ha(-1), respectively. Results revealed that the Cd contents were reduced by 47.44-49.03% in brown rice for F-PA2 and 9.54-42.66% in soil for R-PA2. The superoxide dismutase (SOD) activity was decreased by 10.65-17.98%, the malondialdehyde (MDA) contents were reduced by 28.57% whereas the proline content was decreased by 32.61% under R-PA2. In addition, the filled grain percentage was improved by 6.87% (F-PA2) and 3.70% (R-PA1), respectively. Overall, rice sown after oilseed rape gave better yields than sown after fallow fields while application of slaked lime and sepiolite as passivator could be a potential management option to grow crops in metal polluted soils. (C) 2020 Elsevier Ltd. All rights reserved.

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