| Project/Area Number |
21580073
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Hokkaido University |
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Principal Investigator |
NAKAHARA Osamu 北海道大学, 大学院・農学研究院, 准教授 (10253519)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SHIBUYA Masato 北海道大学, 大学院・農学研究院, 准教授 (10226194)
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| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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|---|
| Keywords | 養分制限 / 窒素制限 / リン制限 / アロフェン / イモゴライト / リター分解 / リグニン / 養分循環 / 温帯林 / 地球温暖化 / 有機物分解 / 無機化 / 二酸化炭素 / 窒素飽和 |
|---|
| Research Abstract |
We examined nutrient limitation in 26 stands of larch forest onvolcanic parent material deposited 300-20,000 y BP at Mt. Shirahata, Sapporo, Japan.Root-ingrowth bioassay showed that of the 26 stands examined 13were N limited,3were Plimited, and 10 were N and P colimited. Nitrogen limitation was common in stands with afoliar N:P ratio<16. In stands with foliar N:P ratio>16, colimitation by N and P dominated,but P limitation was observed at three stands.
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