Self-sustaining nitrogen supply system in long-term unfertilized paddy-field
Project/Area Number |
24658014
|
Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Single-year Grants |
Research Field |
Crop science/Weed science
|
Research Institution | Hirosaki University |
Principal Investigator |
|
Project Period (FY) |
2012-04-01 – 2014-03-31
|
Project Status |
Completed (Fiscal Year 2013)
|
Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
Keywords | イネ / 有機栽培 / 施肥 / 窒素収支 / 収量 / 水稲 / 無肥料 / 土壌微生物 / 水稲栽培 / 有機農業 / 窒素肥料 |
Research Abstract |
Fertilization including both chemical and organic forms is essential for sustainable crop production. However, several paddy field farmers in Japan successfully attain high yield without any fertilization for more than 30 years. To clarify this mechanism, six paddy rice fields in Tohoku region were compared in terms of nitrogen balance. Tillering activity during vegetative growth stage was a key component in regulating rice field. High-yield paddy fields had higher ability to supply mineralized nitrogen resulting from high soil decomposing activity than low-yield fields.
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Report
(3 results)
Research Products
(2 results)