2013 Fiscal Year Final Research Report
Self-sustaining nitrogen supply system in long-term unfertilized paddy-field
| Project/Area Number |
24658014
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| 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
|
| Keywords | イネ / 有機栽培 / 施肥 / 窒素収支 / 収量 |
|---|
| 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.
|
