2012 Fiscal Year Final Research Report
Elucidation of mechanism of nitrogen saturation by using stable nitrogen isotope ratio
| Project/Area Number |
22580167
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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 |
Forest science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
INAGAKI Yoshiyuki 独立行政法人森林総合研究所, 立地環境研究領域, 主任研究員 (00353590)
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| Co-Investigator(Kenkyū-buntansha) |
KOBA Keisuke 東京農工大学, 農学研究科, 准教授 (90311745)
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| Co-Investigator(Renkei-kenkyūsha) |
KOBA Keisuke 東京農工大学, 農学研究科, 准教授 (90311745)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 窒素飽和 / ヒノキ / 窒素安定同位体比 / 土壌 |
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| Research Abstract |
Nitrogen sources for hinoki cypress tree were evaluated by using nitrogen stable isotope ratio. Hinoki cypress in nitrogen saturated condition at Hachioji had low foliar δ15N value which is close to δ15N value in soil nitrate. The result suggests nitrate in soil is dominant source for hinoki trees. For 14 hinoki cypress forests in different regions in Japan, δ15N value was lower where organic matter mass was larger. These findings suggest ability of nitrate uptake by hinoki cypress can be evaluated with foliar δ15N value where organic matter accumulation is small.
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