Chemical Component of Precipitation and Stemflow of Pinus densiflora in Kii-Tanabe, Japan

Abstract

Chemical component dissolved precipitation and stemflow of Pinus densiflora were investigated in both mountain and coastal regions of Kii-Tanabe, Japan. The weighted mean pH value of precipitation was 4.52 in the fomer and 4.59 in the latter during the experimental period. The NO₃^- to nss-SO₄^2- ratio in the precipitation was low, where the acidic contribution of NO₃^- was very small. Stemflow in the mountain region was high acidity, whereas in the coastal region H⁺ levels were adsorbed due to neutralization by the presence of base cation.