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Pollution of Cd has seriously threatened environmental safety and human health. The field experiment was conducted to investigate the effects of calcium-magnesium phosphate fertilizer and water management on bioavailability of Cd in soils and its accumulation in rice. The results revealed that continuous flooding has enhanced soil pH from 5.10 to 5.72 and reduced soil redox potential (Eh) from 164 to - 60 mV. Application of calcium-magnesium phosphate fertilizer has significantly raised soil pH from 5.10 to 6.45 (P < 0.05). The treatment of calcium-magnesium phosphate fertilizer and continuous flooding has reduced available content of Cd in soils by 28.57%. The content of Cd in brown rice was significantly diminished by 51.36% (P < 0.05). The continuous flooding has promoted formation of residual Cd in soil with application of calcium-magnesium phosphate fertilizer. The biomass and grain production of rice was not significantly decreased compared with control.


Wenxuan Luo, Shaona Yang, Mohammad Aman Khan, Jiawei Ma, Weijie Xu, Yaqian Li, Zichen Xiang, Gaoqi Jin, Junwei Jia, Bin Zhong, Lili Duan, Youwei Zhu, Dan Liu. Mitigation of Cd accumulation in rice with water management and calcium-magnesium phosphate fertilizer in field environment. Environmental geochemistry and health. 2020 Nov;42(11):3877-3886

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PMID: 32617850

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