2012 Fiscal Year Final Research Report
Evaluation and improvement of nitrogen and water use efficiencies in Chinese high-yielding rice cultivars
| Project/Area Number |
22580015
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kochi University |
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Principal Investigator |
MIYAZAKI Akira 高知大学, 教育研究部自然科学系, 准教授 (00304668)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Yoshinori 高知大学, 教育研究部自然科学系, 教授 (00093956)
KUSUTANI Akihito 香川大学, 農学部, 教授 (80225143)
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| Research Collaborator |
KOKUBO Toshiaki 茨城大学, 農学部, 特別研究員
CUI Jing 天津農学院, 教授
ZHANG Zujian 揚州大学, 農学院, 准教授
JU Jing 揚州大学, 環境科学院, 准教授
WANG Yulong 揚州大学, 農学院, 教授
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| Project Period (FY) |
2010 – 2012
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| Keywords | 水稲 / 多収性品種 / 窒素吸収 / 水利用効率 / 中国 |
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| Research Abstract |
Chinese high-yielding rice cultivars have large number of spikelet per panicle and heavy grains, producing high yield (8-12t /ha). In Chinese high-yielding rice cultivars, nitrogen and water use efficiencies were evaluated in comparison with Japanese cultivars. Nitrogen absorption from fertilizer was increased by applying a slow release fertilizer, resulting in an increase in grain yield, and the effect of the slow release fertilizer was higher in cultivars with high grain yield per nitrogen absorption (NUEg) than with low NUEg. Inhibition of water supply increased grain yield per water supply 30% at maximum, although there was a large cultivar difference.
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