Effects of thinning on development of understory vegetation and nitrogen utilization of hinoki cypress trees
| Project/Area Number |
25450224
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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 | Forestry and Forest Products Research Institute |
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Principal Investigator |
Inagaki Yoshiyuki 国立研究開発法人森林総合研究所, 四国支所, 主任研究員 (00353590)
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| Co-Investigator(Kenkyū-buntansha) |
木庭 啓介 京都大学, 生態学研究センター, 教授 (90311745)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | ヒノキ / 下層植生 / 間伐 / 窒素 / 競争 / 安定同位体比 / 窒素安定同位体 |
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| Outline of Final Research Achievements |
Thinning in hinoki cypress plantations can develop understory vegetation. Understory vegetation is expected to promote nitrogen cycling of forest ecosystems and enhance nitrogen uptake of hinoki cypress trees. Nitrogen content in leaves of hinoki cypress trees thinned 10 years ago remained lower than that in the unthinned control. Increase of nitrogen uptake by hinoki cypress is not large due to limited increase of leaf biomass.
Nitrogen isotope ratio in leaves was used as an indicator of soil nitrogen sources. Hinoki cypress and understory vegetation utilize similar nitrogen sources in thinned plots while they utilize different sources in the unthinned control. The competition for nitrogen sources between hinoki cypress and understory vegetation was reduced by thinning
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Report
(5 results)
Research Products
(11 results)
