This document discusses cultivation techniques and challenges for a hydroponic plant production system. It describes the environment settings including temperature, humidity, and CO2 levels. A spray hydroponic system is proposed with a conceptual diagram. The system uses high plant density of 4 plants/m2 or a total of 8,300 plants. A production schedule and monthly yield plan with results is presented, showing large differences between planned and actual yields. Challenges discussed include the need for low cost solutions, information exchange, a combination of breeding and cultivation techniques, and automation to reduce labor costs.

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13. Cultivation state of 25th Aug.
Cultivation state of Sept.
Cultivation state of Oct.
Cultivation state of Nov.
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16. Environment setting
Temperature:
Day temp. 22 - 28°C
Night temp. 14 - 16°C
Relative Humidity:
About 75 - 85%
CO2 Concentration:
Max. 800 ppm
Min. 400 ppm
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29. Challenges
Revolutionary Low Cost is required
• A conceptual breakthrough is requested Fresh, Processed (paste etc.)
• Information exchange and discussion among different industries are most
important.
• A hardware only solution is inefficient (The combination of breeding
(cultivar) and cultivation techniques is important.)
• Long term prospect: Overseas development
• Short term prospect: Large-Scale facilities (Plant factory special zones)
• Introduction of IT, downsizing and reducing cost of control systems
• Reduce labor cost and product cost ( automation, development of labor
saving devices)
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31. Spray Hydroponic System
conceptual diagram
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33. Cultivation System
• Spray Hydroponic System
• Multi-Truss High Plant Density
Plant spacing: 4 plant / m²
Total 8.300 plants
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34.  Supplying a limited amount of
Nitrogen per plant to control LAI
 The nutrient solution can be
uniformly supplied to all the plants.
 Supplying sufficient oxygen for a
root can be continued.
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35. Production schedule
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36. Monthly yield plan and results
Units: Kg.
Plan Results Difference
NOV 4.200 2.300 1.900
DEC 4.200 5.200 1.000
JAN 6.000 3.500 2.500
FEB 8.000 3.400 4.600
MAR 12.000 5.800 6.200
APR 14.000 2.500 11.500
MAY 18.000 4.200 13.800
JUN 17.000 5.500 11.500
JUL 12.000 6.700 5.300
Total 95.400 39.100 56.300
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