水管理和钙镁磷酸盐肥在田间环境中降低水稻镉积累。
Mitigation of Cd accumulation in rice with water management and calcium-magnesium phosphate fertilizer in field environment.
机构信息
State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, Zhejiang, China.
Academy of Agricultural and Forestry Sciences of Zhoushan City, Zhoushan City, 316000, Zhejiang, China.
出版信息
Environ Geochem Health. 2020 Nov;42(11):3877-3886. doi: 10.1007/s10653-020-00648-6. Epub 2020 Jul 2.
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.
镉污染严重威胁环境安全和人类健康。本田间试验研究了钙镁磷肥和水分管理对土壤镉生物有效性及其在水稻中的积累的影响。结果表明，连续淹水使土壤 pH 从 5.10 升高至 5.72，土壤氧化还原电位（Eh）从 164 降低至-60 mV。钙镁磷肥的施用使土壤 pH 从 5.10 显著升高至 6.45（P<0.05）。钙镁磷肥和连续淹水的处理使土壤中有效镉含量降低了 28.57%。糙米中镉含量降低了 51.36%（P<0.05）。钙镁磷肥的施用促进了土壤中残留镉的形成。与对照相比，连续淹水并没有显著降低水稻的生物量和籽粒产量。
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