| Project/Area Number |
15K07495
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Forest Research and Management Organization |
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Principal Investigator |
Kabeya Daisuke 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (30353650)
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| Co-Investigator(Renkei-kenkyūsha) |
Saito Satoshi 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (30353692)
Migita Chiharu 国立研究開発法人森林研究・整備機構, 森林総合研究所, 研究員 (70575274)
Tanaka Kenzo 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (30414486)
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| Research Collaborator |
Kawasaki Tatsuro 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員
Araki G Masatake 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 (80353564)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 炭素／窒素バランス / nitrogen deposition / スギ / 成長 / 非構造性炭水化物 / 窒素飽和 / 炭水化物貯蔵 / 都市近郊林 / 人工林 / 繁殖 / 窒素負荷 / 貯蔵炭水化物 / 栄養条件 |
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| Outline of Final Research Achievements |
Nitrogen deposition from atmosphere affects nitrogen availability of the forest ecosystem. Aiming to clarify the effect of the nitrogen deposition on the carbon/nitrogen balance in Cryptomeria japonica, we monitored trunk radial growth and seasonal change of nitrogen and non-structural carbohydrates (NSC) concentrations in the shoot of C. japonica growing in the three sites that were distinguished by the degree of nitrogen deposition.
The shoot nitrogen concentration increased with the degree of the nitrogen deposition throughout the sampling campaign. The NSC concentrations in shoots were not different between the sites. The shoot NSC concentration fluctuated seasonally, and the starch contents disappeared in August. Moreover, trunk diameter growth decreased with the degree of N deposition. These results suggest that, in C. japonica, nitrogen supply is relatively sufficient and the growth of C. japonica in the high-N deposition site might be reduced due to N saturation.
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