| Project/Area Number |
19380086
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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 |
林学・森林工学
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| Research Institution | Kyoto University |
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Principal Investigator |
TOKUCHI Naoko Kyoto University, フィールド科学教育研究センター, 准教授 (60237071)
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| Co-Investigator(Kenkyū-buntansha) |
OHTE Nobuhito 東京大学, 大学院・農学生命科学研究科, 准教授 (10233199)
KOYAMA Lina 京都大学, 大学院・情報学研究科, 准教授 (50378832)
HISHI Takuo 九州大学, 農学部附属演習林, 助教 (50423009)
KANEKO Yuko 琵琶湖環境科学研究センター, 総合解析部門, 専門研究員 (90280817)
HIROBE Muneto 岡山大学, 大学院・環境学研究科, 准教授 (20363575)
HOBARA Satoru 酪農学園大学, 環境システム学部, 講師 (70391159)
舘野 隆之輔 鹿児島大学, 農学部, 准教授 (60390712)
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| Co-Investigator(Renkei-kenkyūsha) |
TATENO Ryunsuke 鹿児島大学, 大学院・農学研究科, 准教授 (60390712)
FUKUSHIMA Keitaro 京都大学, フィールド科学教育研究センター, 特定研究員 (60549426)
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| Project Period (FY) |
2007 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2010: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2009: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2008: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2007: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Keywords | 森林生態系 / 窒素飽和 / 窒素循環 / 窒素可給性 / 不動化 / 森林生態 / 窒素 / リン制御 / 酵素活性 / 土壌 / 高齢林 |
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| Research Abstract |
We Studied N dynamics using ^<15>N dilution method. Immobilization rates were always larger than mineralization and nitrification rates throughout the year and stand age. The relationship between N transformation rates and soil properties ; dissolved organic carbon concentration and soil microbial biomass etc., differed among the seasons. Based on the ^<18>O of NO_3^- of soil solution and the simulation of N immobilization, immobilization of NO_3^- in soil solution needed a few weeks. These results show that abiotic immobilization is one of the important mechanisms for soil N retention in the forest ecosystem.
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