Interaction between Acid Deposition and the Canopy of the Japanese Cedar and Fir in Mt.Oyama.

• OKOCHI Hiroshi

  Faculty of Engineering, Kanagawa University

• HOSONO Tetsuya

  Faculty of Engineering, Kanagawa University

• MARUYAMA Fumitaka

  Faculty of Engineering, Kanagawa University

• IGAWA Manabu

  Faculty of Engineering, Kanagawa University

Bibliographic Information

Other Title

• 丹沢大山における酸性降下物とスギ，モミ樹冠との相互作用

Abstract

Throughfall of the Japanese cedar and fir was collected weekly with precipitation in Mt. Oyama in the southwest of the Kanto Plain. Annual volume weighted mean pH of precipitation was 4.82, 4.76, and 4.94 from 1991 to 1993, respectively. The mean concentrations of major ions in precipitation in Mt. Oyama were lower than those in city area, Yokohama. However, there were very little differences between deposition fluxes of H⁺ and NO^3- in Mt. Oyama (31.4, 43.3 meq/m²/y on the three years average, respectively) and those in Yokohama. Annual amount of water of throughfall for both species was about 60-90% of that of precipitation and total deposition fluxes of major ions were about 2-4 times larger than those of precipitation. In major ions, Na⁺, Cl^-, and SO₄^2- were assumed to be originated mainly from atmospheric input, whereas K⁺, Ca²⁺, and Mg²⁺ were leached from the canopy. In the growing season, NO^3- was absorbed only to the fir canopy. It was indicated that K⁺ was leached from the canopy not only by ion exchange with W but also as the organic salt because of the high correlation between concentrations of total organic carbon (TOC) and K⁺ (r=0.85 and 0.80 for the cedar and fir canopy, respectively).

Journal

• ENVIRONMENTAL SCIENCE

  ENVIRONMENTAL SCIENCE 8 (3), 305-315, 1995

  SOCIETY OF ENVIRONMENTAL SCIENCE, JAPAN

Keywords

• acid deposition, precipitation, throughfall, total organic carbon (TOC)

Details

• CRID: 1390282679396368384
• NII Article ID: 10002756876
• NII Book ID: AN10165252
• DOI: 10.11353/sesj1988.8.305
• ISSN: 18845029
• ISSN: 09150048
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed