| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
Heartwood development is an unique phenomenon to trees and important for the life of trees and for wood utilization by human. Wetwood is a phenomenon of water accumulation into heartwood causing problems in wood drying. To understand the mechanism of the formation of heartwood and wetwood, in this study we developed methods to monitor the sap flow, temperature gradient and water content of tree trunks, which related to the diurnal and seasonal fluctuations of the water potential of the tree trunks. We achieved a technical basis of the long-term monitoring of the water status in tree trunks to cover one growth period continuously with a high time-resolution. Further studies are necessary to develop advanced analyses of the data with extending the number of measured trees of various species.
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