| Project/Area Number |
16380016
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Crop science/Weed science
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| Research Institution | Kyoto University |
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Principal Investigator |
INAMURA Tatsuya Kyoto University, Graduate School of Agriculture, Associate Professor, 農学研究科, 助教授 (00263129)
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| Co-Investigator(Kenkyū-buntansha) |
UMEDA Mikio Kyoto Univ., Grad.Sch.of Agr., Professor, 農学研究科, 教授 (60201357)
IIDA Michihisa Kyoto Univ., Grad.Sch.of Agr., Associate Professor, 農学研究科, 助教授 (50232129)
SUGURI Masahiko Kyoto Univ., Grad.Sch.of Agr., Assistant Professor, 農学研究科, 助手 (10226483)
INOUE Hiromo Kyoto Univ., Grad.Sch.of Agr., Assistant Professor, 農学研究科, 助手 (40260616)
DOI Masahiko Nara Agr. Experimental Station, General Researcher, 水田チーム, 総括研究員 (40443577)
西尾 和明 奈良県農業技術センター, 総括研究員
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2006: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 2005: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2004: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | Paddy-upland rotation / Precision agriculture / Variable rate fertilization / 可変量播種 / 集落営農 / リモートセンシング / 土壌理化学性 / ジオスタティスティカル解析 / 水稲 / 小麦 / 大豆 / コムギ / ダイズ |
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| Research Abstract |
An on-farm experiment was carried out at the paddy fields located in Ohnishi, Sakurai, Nara Japan In Ohnishi, the unit area of the paddy fields that are cooperatively managed by farmers is about 38 ha, and about 380 paddy fields. The cropping system of these fields has been three cropping in two years.
1.The multivariate analysis clearly demonstrated the high contribution of the agronomic factors (soil fertility factor, early growth factor, N dressing and uptake factor) as yield-limiting component factors. The agronomic factors (soil fertility factor, early growth factor, N dressing and uptake factor) could control about 77.1% of the spatially structured variation of the brown rice yield.
2.The uniformity of the cropping system, the cultivation method and the land utilization among fields influenced spatial dependences. Maps of Npf, which were generated by interpolation among estimated values by block kriging, will be made available to the farmer to apply top-dressing at optimal rates depending on the plant condition.
3.The proper management of variable rate seeding in proportion to the soil moisture percentage on dried soil basis at seeding in the wheat field may be able to control the number of panicles in the field to bring the adequate average wheat yield. This variable rate management may control 42.7% of the controllable proportion to total variation of wheat yield in the field.
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