| Project/Area Number |
02454089
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業気象・生物環境制御学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
EGUCHI Hiromi Kyushu Univ., Biotron Inst. Professor, 生物環境調節センター, 教授 (70038272)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Satoshi Kyushu Univ., Biotron Inst. Assistant Professor, 生物環境調節センター, 助手 (90191585)
KITANO Masaharu Kyushu Univ., Biotron Inst. Associate Professor, 生物環境調節センター, 助教授 (30153109)
CHIKUSHI Jiro Kyushu Univ., Biotron Inst. Associate Professor, 生物環境調節センター, 助教授 (00127458)
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1992: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1991: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1990: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Evaporative demand / Growth rate / Heat balance / Controlled environment / Water conductance / Extensibility / Root / Image processing / 葉の生長 / 気孔コンダクタンス / 葉温 / 風速 / 湿度 / 水収支 / 短波放射 / 熱収支式 / 環境要素 / 通水伝導度 / 水プロセス / 蒸散速度 / 通水抵抗 / 根長 |
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| Research Abstract |
Measurements on plant and water behavior, such as weter transport in plant, water potential in plant, plant leaf growth, mass exchange in root system and etc., were carried out to analyze the relationships between plant growth and water dynamics in plant-environment system. Evaporative demand determined from heat balance in leaf was related linearly with measured transpiration. The evaporative demand was depended more largely on short radiation and air humidity than air temperature and air velocity. From the water balance in whole-plant varing with radiation intensity, it was found that hydraulic conductivity through cell membrane and leaf extensibility, besides turgor pressure, also affected on water content variation in plant, stomatal movement, and leaf growth. These variables responded intensively to light exposure at low evaporative demand. In the root system, resistance to water conduction increased with root temperature. The temperature effect suggests to lead to changes in transpiration of plant. Technique using image processing revealed exponential growth of root length and temperature effects on leaf growth. Using by these obtained knowledge, it would be feasible to optimize environmental conditions for agricultural production.
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