2007 年 13 巻 p. 207-212
We observed growth characteristics of trees on a forestanding sandbar in Arakawa River. This sandbar was highly characterized by the three dominant tree species, Salix giogiana Seemen, Robinia pseudoacacia L. and Albizia julibrissin Durazz. In this study, we measured biomass, below and above ground biomass (AGB & BGB etc.), tree diameter at knee height (DKH), tree’ age and soil grain size.
As a result of analysis, the relation biomass (BGB & AGB etc.) and DKH, were expressed in allometric relationship. On the other hand, because the risk that own fall down of a flood decrease by letting BGB grow up than AGB, S. giogiana Seemen can root in the area where is near to the water’s edge. In contrast, R. pseudoacacia L. roots in the area where is far from the water’s edge, because the risk that own fall down of a flood decrease.
