| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
Stem elongation of herbaceous plants in crowded stands is finely controlled so that plants have similar heights to neighbors. We investigated whether canopy trees in forest have similar regulation. We made plots where neighbors were cut at the base of the trunks (all-removed plots) and at a point 2m distant from the top of the trunks (top-removed plots) in a 30 years Picea glehnii forest, and monitored the growth of target trees over two years. Height increment of target trees was decreased in the all-removed plots, showing that neighbors influenced height increment of trunks. In the top-removed plots, however, height increment of targets was not significantly different from that in control plots. It was revealed that the influence of height difference on growth was small if the difference was a degree of 2m.
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