| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Outline of Final Research Achievements |
To establish a methodology for optimizing the greenhouse environment control, a system dynamics plant model predicting the flowering date, yield and quality of arching roses was developed and negative factors affecting the cut flower productivity were elucidated by analyzing the errors between the measured value and the predicted value. As the error factors of carbon gain by bending shoots, overestimation of dark respiration during the night hours and photosynthetic rates during the morning hours of fair days and underestimation of photosynthetic rates during summer resulting from the seasonal changes of LAI were elucidated. It was necessary to set both high and low threshold temperatures when the days to flowering were predicted by using real temperatures. The carbon dioxide concentration was a factor affecting the photosynthetic rate but high carbon dioxide acclimatization occurred depending on the sink activities of harvest shoots.
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