| Project/Area Number |
23380145
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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 |
Agricultural environmental engineering/Agricultural information engineering
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| Research Institution | Hirosaki University |
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Principal Investigator |
ITO Daiyu 弘前大学, 農学生命科学部, 准教授 (00333716)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIDA Sachinobu 弘前大学, 大学院理工学研究科, 助教 (60292140)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUMOTO Kazuhiro 弘前大学, 農学生命科学部, 助教 (60508703)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Fiscal Year 2011: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Keywords | 果樹 / 農業生産環境 / 光合成 / 物質生産 / 微気象観測 / 二酸化炭素フラックス / 渦相関法 / リンゴ |
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| Outline of Final Research Achievements |
Photosynthetic and respiratory rate was comprehensively observed for apples, being treated as population, single plant, and single leaves. First, through the mulch point CO2 flux observation, we found that the daytime absorbed CO2 drastically decreases every time after the understory grasses are mowed. Spatial uniformness of fluxes, energy balance, and soil respiratory rate of the population were also examined to improve the accuracy of the flux observation. Next, an assimilation chamber for adult tree was constructed and photosynthetic rate was measured for a long time. We found that midday depression of photosynthesis occurs in fine days, daily amount of photosynthesis is strongly dependent on the amount of solar radiation, and the photosynthetic rate is higher in the year of heavy fruit load. Finally, thorough single leaves observation, we found that the midday depression of photosynthesis is sometimes accompanied, and sometimes not accompanied by stomatal closure.
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