Abstract
Using the simulated acid incident precipitation or throughfall, saturated soil column experiments werecarried out. Total ion concentration of throughfall is higher than that of incident precipitation. When simulated throughfall was used, acid neutralization by cation exchange was reduced, and Al concentration in effluent was raised. Among co-existing cation in simulated throughfall, the effect of calcium ion and potassium ion on soil acidification were more important than that of sodium ion. Taking account of the experimental results and the effect on plant ecosystems, We discussed about the appropriate index to evaluate the degree of soil acidification.
