Effect of retention of phosphorus in riparian zone soil on different pH rainwater

A phosphorus leaching experiment was performed to study interception of phosphorus in the riparian zone. The removal rate of phosphorus by the soil of the riparian zone is discussed. Results showed that the pH of the simulated rainwater, which acted as leach-water, significantly affected the absorbed phosphorus in the riparian zone soil column. Riparian zone soil column absorbed the minimum TDP and MRP when the rainwater had a pH of 5. The removal rate of the soil of the riparian zone decreased as time went by. The riparian zone had the lowest interception capacity for phosphorus when the rainwater had a pH of 5. The pH significantly influenced the concentration of TP in the soil columns. The concentration of TP was the highest when the pH was 5 and the lowest when the pH was 3. Phosphorus had a high concentration in the first 10 cm of soil from the surface. As the depth increased, the concentration of phosphorus decreased. Understanding the effects of pH on P retention in riparian zone soil will help us understand the transfer and transformation of P in riparian zone soil; this would play an important role in preventing and controlling the eutrophication of water bodies.