| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Research Abstract |
There is a nutrient control method to produce the tomato fruits of high sugar content in soilless cultivation. The nutrient control by the water stress and the salinity stress affects the quality and the yield of tomato fruits but as of now the method of the nutrient management depends on the practical experience of farmer. Therefore, an advanced nutrient control technology is needed to produce the tomato fruits aimed sugar content and quality surely. The nutrient control method based on the constituent information in the growing tomato fruits is considered as a method of achieving such a technology. That is, it can also use it to judge the just harvest timing of fruits at the same time as being able to reflect this information in the nutrient control in real time if the constituent information in the on-plant tomato fruits can be detected by the near-infrared spectroscopy. In this research, when the constituent information in the immature tomato fruits of on-plant was monitored by the near-infrared spectroscopy, expecting the sugar content it ripened into full maturity, and the constructing the system to reflect this in the nutrient control became possible (patent fillings "nutrient controller"). Farther more, in addition to the constituent information in the fruits, to obtain the earlier stress information of plants, the calibration model was developed to measure the water potential of the plant leaf nondestructive on the site that is the index of the water stress of the tomato plants, and the system that was able to measure the water potential of the tomato plant leaf nondestructive in real time on the site were constructed. As a result, the nutrient control based on the water potential information of on-plant leaf became possible. These results are four papers and three patent applications. A prototype device is made for practical use, and it aims at commercialization.
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