Changes in Soil Physical and Chemical Properties during Vegetation Succession on Miyake-jima Island

The bare lands formed after volcanic eruptions provide an excellent opportunity to study the interactions between vegetation succession and soil formation. To explore changes in physicochemical properties processes relationship them, of different ash accumulation on Miyake-jima Island were studied at stages. results showed that bulk density gradually decreased porosity, water content (SWC), pH, cation exchange capacity (CEC), total organic carbon (TOC), nitrogen (TN) increased significantly with succession. surface horizon most obvious, deep accumulated a large amount relatively stable nitrogen. forest land thicker matter horizon, accumulating more than grassland, quality index (SQI) was higher grassland shrubland. In conclusion, our research indicates significant change improvement processes, emphasizing development land.