| Budget Amount *help |
¥20,000,000 (Direct Cost: ¥20,000,000)
Fiscal Year 1985: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1984: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1983: ¥15,000,000 (Direct Cost: ¥15,000,000)
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| Research Abstract |
For the environmental control of the sun plants (tree), the measurements and analyses of both orange and mangrove are done in such a controlled environment as growth cabinet and greenhouse. As a result, the following findings are obtained:
(1) Photosynthetic rate, water potential, stomatal resistance, stomatal conductance and leaf temperature of the plants are measured as a short-term plant-responses. In a growthcabinet, such a fundamental response as step response of the plants is obtained. On the contrary, the stochastic daily changes in these plants are measured in the greenhouse.
(2) System identification is done in both controlled environments, based on spectral analysis in the growth cabinet and time domain method in the greenhouse respectively, accompanying many interesting data in orange and mangrove.
(3) For the verification of the analysis, morphological examination is done by using microscope, where number of stomata, opening area of stomata and wax are carefully observed.
(4) These methods are applied to the oranges cultivated in the plastic house where high quality and yield are obtained. Growth mechanism is also elucidated both from morphological aspect and from systen analytical aspect based on the measurement in short-term.
(5) On the other hand, growth mechanism in mangrove plants is also made clear in comparison with that in oranges. These findings look effective for the probable hydroponics in oranges or the probable afforestation of mangroves in northern country far beyond the limited tropical area.
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