水田における表層剥離の発生機構
書誌事項
- タイトル別名
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- Pattern of Occurrence of Surface Soil Separation in Paddy Fields.
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説明
To analyse the occurrence of surface soil separation (S. S. S.) in paddy fields, we studied the external appearance of the S. S. S. layer and the changes in the population of associated algal species in the layer.<br>Furthermore, we studied the role of diatoms (Bacillariophyceae) during the initial stage of layer formation.<br>The formation of the S. S. S. layer in paddy fields exhibited the following sequence. Firstly, the fine soil particles that accumulated on the soil surface after puddling aggregated rapidly due to the activity of diatoms, leading to the formation of a thin, light brown layer. Secondly, the diatom population continued to increase resulting in further aggregation of soil particles. Furthermore, on this stage, the increase in the photosynthetic activity of algae resulted in the accumulation of oxygen which subsequently led to the floating of the layer. Thirdly, filamentous blue-green algae (Cyanophyceae) i. e. Osillatoria sp. started to grow and then become dominant, conferring a green color to the layer. Finally, due to the large population of blue-green algae soil particles, become more tightly bound resulting in the strengthening of the layer.
収録刊行物
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- 雑草研究
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雑草研究 42 (3), 227-232, 1997
日本雑草学会
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詳細情報 詳細情報について
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- CRID
- 1390001204279394176
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- NII論文ID
- 130003811266
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- ISSN
- 18824757
- 0372798X
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
