Agricultural soils can contain high arsenic (As) concentrations due to specific geological contexts or pollution. Fertilizer amendments could influence As speciation and mobility thus increasing its transfer to crops and its toxicity. In the present study, field-relevant amounts of fertilizers were applied to soils from a cultivated field that was a former ammunition-burning site. Potassium phosphate (KP), ammonium sulfate and organic matter (OM) were applied to these soils in laboratory experiments to assess their impact on As leaching, bioavailability to Lactuca sativa and microbial parameters. None of the fertilizers markedly influenced As speciation and mobility, although trends showed an increase of mobility with KP and a decrease of mobility with ammonium sulfate. Moreover, KP induced a small increase of As in Lactuca sativa, and the polluted soil amended with ammonium sulfate was significantly less phytotoxic than the un-amended soil. Most probable numbers of AsIII-oxidizing microbes and AsIII-oxidizing activity were strongly linked to As levels in water and soils. Ammonium sulfate negatively affected AsIII-oxidizing activity in the un-polluted soil. Whereas no significant effect on As speciation in water could be detected, amendments may have an impact in the long term.

由于特定的地质环境或污染，农业土壤中的砷含量可能很高。肥料改良剂可能影响As的形态和流动性，从而增加其向农作物的转移及其毒性。在本研究中，将与田间相关的肥料施用于曾经是弹药燃烧场的耕地上的土壤。在实验室实验中将磷酸钾（KP），硫酸铵和有机物（OM）应用于这些土壤，以评估它们对砷淋溶，紫草的生物利用度的影响和微生物参数。尽管趋势表明钾肥的迁移率增加而硫酸铵的迁移率下降，但没有一种肥料显着影响砷的形态和迁移率。此外，KP引起紫花苜蓿中As的少量增加，并且用硫酸铵改良的污染土壤的植物毒性显着低于未改良的土壤。最可能的AsIII氧化菌数量和AsIII氧化活性与水和土壤中的砷含量密切相关。硫酸铵对未污染土壤中的AsIII氧化活性有负面影响。虽然没有发现对水中的物种形成有重大影响，但从长远来看，修订可能会产生影响。