| Budget Amount *help |
¥25,350,000 (Direct Cost: ¥19,500,000、Indirect Cost: ¥5,850,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
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| Outline of Final Research Achievements |
Nitrate use and photosynthesis of boreal tree species were investigated throughout winter to demonstrate that boreal tree species can acquire N in winter to meet the N demand. Field investigations on black spruce (Picea mariana) in interior Alaska, USA showed that black spruce was able to assimilate nitrate throughout the winter, while the capacity of photosynthesis declined with decreasing temperature in early to mid-winter, but did not increase when the temperature recovered in the late winter. Sakhalin spruce (Picea glehnii) grown in a low temperature incubator showed the same trend. Photosynthetic capacity of Sakhalin spruce declined with decreasing temperature, but did not increased with the temperature rise simulating late winter.
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