含磷污水淋滤条件下土壤中磷迁移转化模拟实验

以土柱实验为基础，结合磷在土壤中的化学转化机理，将磷在土壤中的形态分为可溶态磷、吸附态磷和沉淀态磷，根据磷在土壤中的迁移转化模拟实验，分析了这3种形态的磷在土壤中迁移转化的规律：可溶态磷进入土壤中，主要随水分作溶质迁移，在迁移的同时，不断转化为吸附态磷和各种沉淀态磷；吸附态磷由可溶态磷生成，并与可溶态磷一起发生沉淀反应生成沉淀态磷，但固着于土壤颗粒上，不发生迁移；沉淀态磷由可溶态磷和吸附态磷生成，在土壤中主要参与化学转化；沉淀态磷在土壤中有随水分迁移的现象。

Simulated study on transferring and transforming of phosphorus in soil leached by waste water

An experiment, was performed to simulate phosphorus transferring and transforming in the soil. The results showed that, phosphorus in the soil can be water P, adsorption P or deposition P,and each follows its own transfer and transforom law. The water P transfers with water firstly, at the same time it transforms to adsorption P and deposition P successively: The adsorption P can not be transferred but is adsorbed by the particle in the soil, and turned into deposition P as time goes on. The deposition P in transformed from water P and adsorption P. It is specially important that deposition P was found transfers with water in the soil during the experiment.