| Project/Area Number |
63560147
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
林学
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| Research Institution | FACULTY OF AGRICULTURE, NIIGATA UNIVERSITY |
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Principal Investigator |
KOBAYASHI Shogo NIIGATA UNIV., FAC. AGRIC., PROFESSOR, 農学部, 教授 (50115028)
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| Co-Investigator(Kenkyū-buntansha) |
TAKATA Kazuhiko NIIGATA UNIV., FAC. AGRIC., PROFESSOR, 農学部, 教授 (00018524)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1989: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1988: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Allometry / Relative growth / Tree form / Stem form / Crown / Growth gradient / Stem analysis / Presslar's low / 針葉樹 / 樹冠形 / 樹形の形成過程 / 相対生長 / 生長階程 / アロメトリー / 等生長 |
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| Research Abstract |
The biological concept of stem form is discussed on the basis of the allometric relation between stem diameter and tree height. According to allometric low, relative growth rate of two different parts of an organism, x and y are expected to be proportional or 1/y.dy/dt=beta.1/x.dx/dt In this study, x is the tree height and y is the stem diameter at some cross-sectional area. Relative growth coefficient beta's were calculated for three species of needle-leafed trees. In three species, it became clear that the allometric relation shows two distinct phases on the basis for the form; beta=1 within crown and beta<1 in part of the clear bole except the butt-swelling. Simulation based on the allometric relations could adequately describe process of developing stem form in environmental condition of stand. The allometric analysis was also available for developing the crown of the needle-leafed tree.
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