書誌事項
- タイトル別名
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- Durability and Significance of Mole Drains for the Drainage-function Improvement in Rotational Paddy Fields
- スイデン リンサク ニ オケル ダンガン アンキョ ノ ハイスイ コウカ ジゾクセイ ト セコウ イギ
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Percolation rates of soil layers above mole drains and at the midpoint of mole drains were measured in rotational paddy fields under varied land use and crops. In addition, soil layers above mole drains were observed in these fields. Percolation rates above mole drains were kept high at the rate of 350-480mm h-1 in upland fields and in paddy fields without puddling. On the other hand, in the paddy field with puddling, percolation rates decreased by each puddling practice. The percolation rate above the mole drain is affected by in-situ vertical cracks formed during subsoiling practices, rather than the residual void area of the mole drain hole. The characteristics of the drainage function in rotational paddy fields with mole drains are that:(1) the percolation rate increases right above the mole drain with the subsoiling practice, (2) upland crop culture increases the percolation rate at the midpoint of mole drains, (3) the percolation rates above the mole drain and at the midpoint of mole drains decrease with puddling practices in the paddy field. Our results indicate that, to keep the drainage function of the paddy field high, the mole drain needs to be re installed after two paddy culture.
収録刊行物
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- 農業農村工学会論文集
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農業農村工学会論文集 2007 (250), 453-461,a3, 2007
公益社団法人 農業農村工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680262340352
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- NII論文ID
- 10019803187
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- NII書誌ID
- AA12240517
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- ISSN
- 18847242
- 18822789
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- NDL書誌ID
- 8916299
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可