森林立地学会誌 森林立地35(2), 1993, pp. 1〜9
長谷川 浩一・佐々 朋幸
Kooichi HASEGAWA and Tomoyuki SASSA: Some changes of stem wood qualities in the Japanese ceders (Cryptomeria japonica D. Don) damaged by forest floor fire
On April, 1987, the man-made Sugi (Cryptomeria japonica D. Don) forests in the Umada Peninsula of Kamaishi city, Iwate Prefecture were severely damaged by large-scale forest fire(forest floor fire).
When we investigated the damaged tree condition just after the forest fire, we found that adult tree seemed not to be serious in spite that almost young trees were burnt to death, because the scar of burns is remained only on the part near the root of tree stem for adult ones different from young ones. Thus, it is very difficult to determine the fate of damaged trees, only with the scar of burns just after forest ground (floor) fire.
From the reason above mentioned, we observed citologically
how to change the wood qualities with the pass of time after fire damage. As
the result of that, we found, 1) the cambium under the scar of burn stop their
fuuction, 2) those of upper part of damage and lower one can keep their
function about one year and some months, respectively, and 3) the undamaged
cambium extend their activity into damaged parts.