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.

镉污染严重威胁着环境安全和人类健康。进行了田间试验，研究了钙镁磷酸盐肥料和水分管理对土壤中镉的生物利用度及其在水稻中的积累的影响。结果表明，连续驱使土壤pH从5.10提高到5.72，土壤氧化还原电位（Eh）从164降低到− 60 mV。钙镁磷肥的施用已将土壤的pH值从5.10显着提高到6.45（P  <0.05）。钙镁磷酸盐肥料的处理和连续驱水使土壤中Cd的有效含量降低了28.57％。糙米中的镉含量显着降低了51.36％（P <0.05）。连续淹水促进了钙镁磷肥在土壤中残留镉的形成。与对照相比，水稻的生物量和谷物产量没有显着下降。