| Project/Area Number |
12460031
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
OKAZAKI Masanori Tokyo University of Agriculture and Technology, TUAT. BASE, Professor, 大学院・生物システム応用科学研究科, 教授 (00092479)
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| Co-Investigator(Kenkyū-buntansha) |
HAYASHI Kentaro Pacific Concaltants Section of Encirorsunt Researcher, 環境部, 研究員
BABA Mitsuhisa Kitasato Univ. Faculty of Vet. Sci Animal Husb. Lecturer, 獣医畜産学部, 専任講師 (70286368)
KATO Makoto Tokyo University of Agriculture and Technology, TUAT. Faculty of Agriceltuce, Professor, 農学部, 教授 (50015096)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2001: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | acid deposition / salfate / ammonium / nitrate / chloride / sea salt / pyrodastic material / mass balance model / 流域 |
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| Research Abstract |
Effects of acid deposition on ecosystem
Acid deposition in Hachioji amounted to 1.1〜2.5 kmol_c ha^<-1> yr^<-1> for S and 2.3〜3.8 kmol_c ha^<-1> yr^<-1> for N, which was partly affected by Mt Oyama, Miyake Island, but mostly influenced by human activities. On the other hand S and N deposition in Towada was 0.8 and 0.7 kmol_c ha^<-1> yr^<-1>, respectively. Acid deposition in Towada was characterized by large amount of load of N derived from animal husbandry and Cl derived from sea salt.
Acid consumption by pyroclastic material on weathering amounted to 27 to 28 mmol kg^<-1> in the case of 1.0 x 10^<-3> mol L^<-1> hydrochloric acid solution. It has an important role in consuming acid in soils.
Mass balance model
Forest decline accompanied with soihacidification in southern Kanto District was deduced by mass balance model, which had the advantage to screen the areas dominantly affected by acid deposition. According to mass balance model we can propose the abatement target for acid deposition based on the deposition load and the sensitivity of forest ecosystem : reducing until 50 to 60 % of acid deposition level in1997.
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