Evaluation of Liming Effect on soil Acidification around the Red and Black Pine in Rokko Mountains

The liming effect on the remediation of the acidified soil was discussed experimentally by using the acidified soil in the Rokko Mountains. By the liming operation, the base saturation (BS) in both O layer soil and A layer soil were recovered. The recovery rate of the BS in the O layer soil is lager than that of the A layer soil, because the lime was added on the O layer soil surface and the added calcium was sorbed mainlyon the O layer soil before reaching to the A layer soil set under the O layer soil in the experimental column. Theliming leached out the magnesium ion previously absorbed in the soil, but the pH in the breakthrough solution kept its influent value. I developed the mathematical model for evaluation of liming effect. The simulation results fitwell with the experimental data: those phenomena mentioned above was well reproduced especially on the calcium sorption in O layer soil and no change in pH in soil column effluent.