| Project/Area Number |
22710007
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
|
|---|
| Research Institution | Shinshu University |
|---|
Principal Investigator |
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| Project Period (FY) |
2010 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
|
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| Keywords | リン / ホスファターゼ / 森林土壌 / リン制限 / 土壌微生物 / 可給態リン |
|---|
| Research Abstract |
To examine the possibility of phosphorus limitation in decomposition of soil organic matter in Japanese forest soils, we determined whether the soil microorganisms are limited by phosphorus. Both phosphomonoesterase and phosphodiesterase activities showed significant negative correlations with available P/microbial biomass C ratio in the soils. Also, phosphorus addition significantly increased dehydrogenase activity in low-pH soils. These results indicate the phosphorus limitation in soil microorganisms, and, therefore, imply that decomposition of soil organic matter may be limited by phosphorus in Japanese forest soils.
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