Downstream Environmental Impact Evaluation from Rice Yield and Fertilizer Application Aspect
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- HASHIMOTO Iwao
- Ishikawa Prefectual University
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- MARUYAMA Toshisuke
- Ishikawa Prefectual University
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- MURASHIMA Kazuo
- Ishikawa Prefectual University
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- TAKIMOTO Hiroshi
- Toyama Prefectual University, Faculty of College Course
Bibliographic Information
- Other Title
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- 水稲の収穫量と施肥量からみた下流環境への負荷
- スイトウ ノ シュウカクリョウ ト セヒリョウ カラ ミタ カリュウ カンキョウ エノ フカ カホクガタ エンガン テイヘイ スイデン チタイ ノ タンイ スイデン ニ オケル T N T P シュウシ ノ ジレイ
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Abstract
The purpose of this research is to clarify the actual phenomena and evaluation of the nitrogen and phosphorus input/output balance in a paddy field located in the lowlands of Kahokugata. The authors found that the amount of chemical fertilizer that was applied to this field accounts for a high percentage in the N and P input. The authors also found the amount of yield with husk taken out from this field accounts for a high percentage in the N and P output. Because the amount of N and P in the yield was greater than the applied fertilizer, these two elements, N and P, could be supplied from acidic oxide fallout, nitrogen fixation and irrigation water. We clearly demonstrated that rice in a paddy is “a crop purifier” or “a cleaning crop” and plays an important role on the purification of the paddy system environment absorbing nitrogen pollution. With this point of view, we concluded that rice production in the lowlands of Kahokugata is environmentally-friendly agriculture.
Journal
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- Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
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Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 2007 (250), 385-392,a1, 2007
The Japanese Society of Irrigation, Drainage and Rural Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390001205285454464
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- NII Article ID
- 10019803060
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- NII Book ID
- AA12240517
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- ISSN
- 18847242
- 18822789
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- NDL BIB ID
- 8916033
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed