【摘要】 坡地磷素迁移是导致土壤质量退化、肥料利用率降低以及水体富营养化的重要原因,是非点源污染的重要形式。通过对土壤中磷素的形态转化、降雨特征、土壤理化性状与地形条件以及土地利用方式等四个主要方面阐述了坡地磷素迁移的国内外研究进展,提出当前坡地磷素迁移研究的三个主要方向:(1)遴选适当的磷素形态指标,使之能同时较敏感地反映坡地磷素流失对水环境和土壤质量的影响;(2)磷素在土壤中的形态转化与坡地磷素迁移的相互关系;(3)坡地磷素迁移的动态过程与空间变异。通过这三方面的工作将会有力促进磷素迁移及其环境影响研究的规范化,促进土壤科学与环境科学的相互借鉴与融合,也将为农田养分的科学管理、土壤退化的控制与修复奠定理论基础。更多还原

【Abstract】 Phosphorus transport on slope land(PTSL) is an important cause resulting in soil quality degradation,fertilizer use efficiency declination,and water eutrophication.PTSL is also a critical pattern of nonpoint source pollution.Through four impacting aspects including phosphorus form transformation in soil,rainfall characteristics,physical and chemical soil properties and landform conditions as well as land use patterns,the development of study on PTSL was reviewed.Three main aspects of current study on PTSL were proposed including(1) selection of suitable P form indices which can clearly reflect its impacts of P loss both on water environments and soil qualities;(2) the relationship between P transformation in soil and PTSL;and(3) the dynamic process of PTSL and the spatial variability on slope land using isotope tracing method.Study in these three suggested aspects will effectively accelerate the standardization of P transport research and its environmental impacts,promote the mutual use for references and combinations between soil science and environmental science,and establish a theoretical base for the scientific nutrient management and soil degradation prevention and rehabilitation.更多还原