【摘 要】
：
Rare earth elements(REEs)increasingly used in agriculture as an amendment for crop growth may help to lessen environmental losses of phosphorus(P)from heavily f
【机 构】
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Institute of Geographic Sciences and Natural Resources Research,USDA-ARS
【基金项目】
：
Supported by the National Natural Science Foundation of China;the Short-Term Visiting Program for Advanced Scholars,Chinese Academy of Sciences
论文部分内容阅读
Rare earth elements(REEs)increasingly used in agriculture as an amendment for crop growth may help to lessen environmental losses of phosphorus(P)from heavily fertilized soils.The vertical transport characteristics of P and REEs,lanthanum(La),neodymium(Nd),samarium(Sm),and cerium(Ce),were investigated with addition of exogenous REEs at various doses to packed soil columns(20 cm deep).Vertical transfers of REEs and P were relatively small,with transport depths less than 6 cm for most REEs and P.Export of applied REEs in leachate accounted for less that 5% of inputs.The addition of Ce,Nd and Sm to soil columns significantly decreased concentrations of extractable soil P up to a depth of 4cm,with soil P concentrations unaffected at depths > 4 cm.In general,REEs had little effect on the vertical leaching of P in packed soil columns.
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