Effects of thinning in <I>Cryptomeria japonica</I> D. Don stand on its root growth and function of preventing shallow landslide
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- KAKETANI Ryouta
- Forestry and Forest Products Research Institute
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- TAKIZAWA Hideki
- College of Bioresource Sciences, Nihon University
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- KOSAKA Izumi
- College of Bioresource Sciences, Nihon University
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- SONOHARA Waka
- College of Bioresource Sciences, Nihon University
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- ISHIGAKI Itsurou
- College of Bioresource Sciences, Nihon University
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- ABE Kazutoki
- College of Bioresource Sciences, Nihon University
Bibliographic Information
- Other Title
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- スギ林分の間伐が根系生長と表層崩壊防止機能に与える影響
- スギバヤシ ブン ノ カンバツガネケイ セイチョウ ト ヒョウソウ ホウカイ ボウシ キノウ ニ アタエル エイキョウ
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Description
Root distribution was investigated targeting eleven Cryptomeria japonica D. Don in thinning stands and non-thinning stands. Whole root systems of the each investigated trees were dug up carefully in the field. And root diameter and length of all roots at every 10 cm interval to depth direction and at 50 cm interval to radius direction. As a result, the whole root volume of the one tree has a good correlation with its trunk volume index and tree number density, respectively. And the amount of roots growing in the sliding surface of the landslide bottom and sides were not increased with increasing stand age. This means that the leading idea so far that the forest function of preventing shallow seated landslide is caused by roots growing on the sliding surfaces might not be correct. We assumed that the forest function of preventing landslide could be generate by suppressing deformation and cracks of the surface soil layer by the large amount of roots growing in it. The root volume in surface soil layer was calculated by the data of Cryptomeria japonica D. Don root distribution. We found that the root volume of surface soil layer in a thinning stands was much more than non-thinning stands from 10 to 30 year old. It is consistent with the relationship between number of the shallow landslides that occurred in younger forests and the stand age.
Journal
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- Journal of the Japanese Society of Revegetation Technology
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Journal of the Japanese Society of Revegetation Technology 42 (2), 299-307, 2016
JAPANESE SOCIETY OF REVEGETATION TECHNOLOGY
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Keywords
Details 詳細情報について
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- CRID
- 1390282680059822848
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- NII Article ID
- 130005440090
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- NII Book ID
- AN10130633
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- ISSN
- 18843670
- 09167439
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- NDL BIB ID
- 027803078
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed