| Project/Area Number |
09660163
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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 |
林学
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| Research Institution | Ehime University |
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Principal Investigator |
EZAKI Tsugio Ehime University, College of Agriculture, Professor, 農学部, 教授 (00036378)
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| Co-Investigator(Kenkyū-buntansha) |
IWAMOTO Tohru Ehime University, College of Agriculture, Associate Professor, 農学部, 助教授 (70036375)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | devastated land / mycorrhizal fungi / soil formation / erosin control / Woody plant / forest regeneration / mulching sheet / native plant |
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| Research Abstract |
To revegetate devastated land with woody plants, the following are important : control of surface erosion, lessening the effects of ash fall and sulfurous acid gas, and promotion of woody plant growth. Through use of mulching sheets comprised primarily of polyestel random fiber, and mycorrhizal fungi, the present study was conducted for 8 years.
The growth at the experimental site belong to Ehime University where the seeds of Pinus densiflora were incorporated into MS showed greater values in basal diameter and planting stock height from the first year, compared with those at control plots. Mulching sheet were stuck at the site where 6 years had elapsed after Pinus thunbergii was planted at Mt.Tanakami in Ohtsu, Shiga. As a result, an increase of 60-415% was shown in the basal diameter growth and tree height growth of Pinus thunbergii, compared with those of control plots during 8 years. At Noun River experimental site of Sakurajima Island in Kagoshima where Pinus thunburgil of a 2 year-old planting stock was planted after MS were stuck, Pinus thunburgii shown a strong tolerance against sulfurous acid gas.
Surface erosion control by mulching sheets was quite satisfactory. Mulching sheets and mycorrhizal fungi diminished the effects of sulfurous acid gas and ash fall and promoted basal diameter, height and biomas growth. Work should be undertaken to ensure soil formation of subsoil of growth base and the present study shows that mulching sheets and Pisolithus tinctorius Coker et Couch of exogenous mycorrhizal fungi are effective means to achieve this purpose.
From these findings, it was estimated that MS and Mycorrhizal Fungi were effective for the regeneration of forests devastated by various causes.
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