Study on the edaphic factor in low yield of rice paddy cultivated in rainy season and technical countermeasures to improve the soil condition in the Mekong Delta
Project/Area Number |
25304024
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 海外学術 |
Research Field |
Plant nutrition/Soil science
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Research Institution | Japan International Research Center for Agricultural Sciences |
Principal Investigator |
IIZUMI YOSHIKO 国立研究開発法人国際農林水産業研究センター, 生産環境・畜産領域, 主任研究員 (00414996)
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Co-Investigator(Kenkyū-buntansha) |
KONDO MOTOHIKO 名古屋大学, 生命農学研究科, 教授 (00355538)
WATANABE TAKESHI 国際農林水産業研究センター, 企画調整部, 科長 (40425525)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
|
Keywords | 水稲 / 生育障害 / 水田 / 灌漑水管理 / 土壌化学 / 作物生理 / メコンデルタ / ベトナム |
Outline of Final Research Achievements |
This study aimed to assess the low rice yield in the rainy season and identify its causes, and to show technical countermeasures for it. The yield of unhulled rice cultivated in the rainy season was almost half of that in the dry season. The main cause of this low yield in the rainy season was decrease in spikelet number / panicle. It is suggested that disorders to growth occurred not only by excess soil reduction but also by meteorological factors, i.e. high temperature, strong wind and low solar radiation. It was revealed that mid-term drainage in the rainy season was effective to moderate soil reduction and keeping floodwater in paddy field from harvest of the dry season cultivation to the beginning of the wet season cultivation inhibits forming acid (sulfuric acid).
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Report
(4 results)
Research Products
(8 results)
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[Presentation] Low yield improvement to the wet season rice cropping -Soil and water properties-2015
Author(s)
Iizumi, Y., Watanabe, T., Kondo, M., Luu, H. M., Duong, H. S., Nguyen, K. T., Nguyen, H. C.
Organizer
JIRCAS-CTU Climate Change Project, Workshop 2015
Place of Presentation
カントー大学(ベトナム)
Year and Date
2015-12-22
Related Report
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[Presentation] Improvement of low rice yield in wet season2015
Author(s)
Iizumi, Y., Watanabe, T., Kondo, M., Luu, H. M., Duong, H. S., Nguyen, K. T., Nguyen, H. C.
Organizer
JIRCAS-CTU Climate Change Project, Workshop 2015
Place of Presentation
カントー大学(ベトナム)
Year and Date
2015-12-22
Related Report
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[Presentation] Low yield improvement of the wet season rice cropping -Physiological characterization2015
Author(s)
Kondo, M., Iizumi, Y., Watanabe, T., Luu, H. M., Duong, H. S., Nguyen, K. T., Nguyen, H. C.
Organizer
JIRCAS-CTU Climate Change Project, Workshop 2015
Place of Presentation
カントー大学(ベトナム)
Year and Date
2015-12-22
Related Report
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[Presentation] Cause of low yield of paddy rice in the rainy season on the Mekong Delta, Vietnam2013
Author(s)
Iizumi, Y., Kondo, M., Watanabe, T., Nakagawa, H., Yoshida, H., Toriyama, K.
Organizer
SIL XXXII Congress
Place of Presentation
Budapest Congress Center
Related Report