通过湖磷的来源途径（入湖河道、湖区径流、湖面沉降、养殖投饵、底泥释放）和湖体各要素中（水体、浮游植物、大型水生植物、鱼类等）磷迁移过程调查资料的分析，建立了描述磷在上述各要素中迁移过程的数学模型，经实测资料的验证，模型能较好地反映湖磷的迁移过程及动态变化规律，对该湖磷浓度预测及磷资源合理利用具有重要指导作用． Through the investigation of the phosphorus sources in Lake Li (lakes, lake runoff, lake sedimentation, culture feeding and sediment release) and the phosphorus migration process among various elements of lakes (such as water body, phytoplankton, macrophytes and fish) According to the analysis of the data, a mathematical model describing the process of phosphorus migration in the above elements was established. After verified by the measured data, the model can well reflect the phosphorus migration process and the dynamic change rule in Lihu Lake. The rational use of resources has an important guiding role.