Monitoring study has been carried out in Htchioji of Japan and Chunchon of Korea from July 1996 to June 1997 to investigate the effects of acid deposition on soil ecosystems under red pine (Pinus densiflora) by collecting open bulk precipitation, thro...
Monitoring study has been carried out in Htchioji of Japan and Chunchon of Korea from July 1996 to June 1997 to investigate the effects of acid deposition on soil ecosystems under red pine (Pinus densiflora) by collecting open bulk precipitation, throughfall, stemflow, soil solution and stream water. The weighted mean pH value of open bulk precipitation in study duration was 4.79 for Hachioji and 5.29 for Chunchon respectively, which were called "acid precipitation (rain) ". The total cation plus anion input from open bulk precipitation, throughfall and stemflow were 3.27, 10.74 and 0. 19 kmolcha-lyr-1 in Hachioji, and 2.71, 1.96 and 0.08 kmolcha-16month-1. The input of H^+ to red pine forest from throughfall amounted to 50 % of the input from open bulk precipitation in Hachioji, and 225 % of the input from open hulk precipitation in Chunchon. The weighted mean pH values of soil solution under red pine forest ranged from 5.14 to 6.62 in Hachioji and 4.99 to 6.51 in Chunchon, which markedly lower than the values of soil solution in open bare area with some exceptions.