Annual nitrous oxide emission from forest soil in a small headwater catchment and the mechanism of nitrous oxide production

• Project/Area Number: 18780049
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Plant nutrition/Soil science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: MORISHITA Tomoaki Forestry and Forest Products Research Institute, 立地環境研究領域, 主任研究員 (90391185)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,540,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2006: ¥1,500,000 (Direct Cost: ¥1,500,000)
• Keywords: 亜酸化窒素 / 硝化 / 脱窒 / スギ林 / 落葉広葉樹二次林 / 地球温暖化 / 溶存ガス / 森林 / スギ / 森林土壌

Research Abstract

亜酸化窒素は、二酸化炭素、メタンについで大きな温室効果ガスである。森林土壌は亜酸化窒素の放出源であるが、放出メカニズムの解明は不十分である。そこで、斜面上部が落葉広葉樹林、斜面下部がスギ林の森林小流域で、土壌からの亜酸化窒素放出量を3年にわたって観測した。その結果、斜面上部広葉樹林よりも斜面下部スギ林で亜酸化窒素放出量が大きかった。これは、斜面下部スギ林では土壌水分率が高く、亜酸化窒素を生成する微生物が活動しやすいためと考えられた。

Research Products

• [Journal Article] Methane uptake and nitrous oxide emission in Japanese forest soils and their relations to soil and vegetation types (2007)
  • Author(s): 森下智陽、阪田匡司、高橋正通、石塚成宏、溝口岳男、稲垣善之、寺澤和彦、澤田智志、五十嵐正徳、安田洋、小山泰弘、鈴木祥仁、豊田信行、室雅道、金城勝、山本博一、芦谷大太郎、橋本哲、金澤洋一、馬田英隆
  • Journal Title: Soil Science and Plant Nutrition 53 Pages: 678-691
  • Peer Reviewed
• [Journal Article] Methane uptake and nitrous oxide emission in Japanese forest soils and their relations to soil and vegetation types (2007)
  • Author(s): Tomoaki Morishita
  • Journal Title: Soil Science and Plant Nutrition 53 Pages: 678-691
  • Peer Reviewed
• [Journal Article] Fungal N_2O production in an arable peat soil in Central Kalimantan, Indonesia (2007)
  • Author(s): Yosuke Yanai
  • Journal Title: Soil Science and Plant Nutrition 53 Pages: 806-811
  • Peer Reviewed
• [Journal Article] スギ林土壌の窒素無機化特性とそれに及ぼす環境変動や施業の影響 (2006)
  • Author(s): 平井敬三、阪田匡司、森下智陽、高橋正通
  • Journal Title: 日本林学会誌 88 Pages: 79-84
  • NAID: 110006882816
  • Peer Reviewed
• [Presentation] 森林伐採前後における土壌からのCO2、CH4、N2Oフラックスの変化-ヒノキ4事例の観測結果を元に (2009)
  • Author(s): 森下智陽
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 名古屋
  • Year and Date: 2009-09-10
• [Presentation] Effects of thinning and clear-felling on greenhouse gas fluxes in Japanese cedar forest on Brown forest soils (2008)
  • Author(s): 森下智陽
  • Organizer: Euro Soil
  • Place of Presentation: オーストリア
  • Year and Date: 2008-08-27
• [Presentation] Effects of thinning and clear-felling on greenhouse gas fluxes in Japanese cedar forest on Brown forest soils (2008)
  • Author(s): T. Morishita, Shigehiro Ishizuka, Tadashi Sakata, Masamichi Takahashi, Shinji Kaneko
  • Organizer: Euro Soil 2008
  • Place of Presentation: ウィーン、オーストリア
  • Year and Date: 2008-08-27
• [Presentation] 森林小流域における亜酸化窒素放出過程 (2008)
  • Author(s): 森下智陽
  • Organizer: 第119回日本森林学会
  • Place of Presentation: 東京
  • Year and Date: 2008-03-28
• [Presentation] Spatial variability of N2O emission in a forested small catchment in Japan (2007)
  • Author(s): 森下智陽
  • Organizer: 4th Nitrogen Conference
  • Place of Presentation: ブラジル
  • Year and Date: 2007-10-03
• [Presentation] Spatial variability of N_2O emission in a forested small catchment in Japan (2007)
  • Author(s): Tomoaki Morihsita
  • Organizer: 4th Nitrogen Conference
  • Place of Presentation: ブラジルコスタ・ド・サウイペ
  • Year and Date: 2007-10-03
• [Presentation] Seasonal change in N2O flux in Japanese cedar and hardwoods forests in Japan (2007)
  • Author(s): 森下智陽
  • Organizer: International Symposium of Forest soil
  • Place of Presentation: オ-ストラリア
  • Year and Date: 2007-08-22
• [Presentation] Seasonal change in N_2O flux in Japanese cedar and hardwoods forests in Japan (2007)
  • Author(s): Tomoaki Morihsita
  • Organizer: International Symposium of Forest Soil
  • Place of Presentation: オーストラリア ヌーサ
  • Year and Date: 2007-08-22
• [Presentation] 森林小流域におけるN2Oフラックスの季節変化 (2007)
  • Author(s): 森下智陽
  • Organizer: 第118回日本森林学会
  • Place of Presentation: 福岡
  • Year and Date: 2007-04-03
• [Presentation] CH4 uptake and N2O emission from the forest soils in Japan (2007)
  • Author(s): 森下智陽
  • Organizer: 4th USDA Greenhouse Gas Conference
  • Place of Presentation: アメリカ
  • Year and Date: 2007-02-07
• [Presentation] CH4 uptake and N2O emission from the forest soils in Japan (2006)
  • Author(s): 森下智陽
  • Organizer: 18th World Congress of Soil Science
  • Place of Presentation: アメリカ
  • Year and Date: 2006-07-11