信州の巨樹・名木 : その活力評価

概要

論文の詳細を見る
Thirty gigantic-famous trees were evaluated on their present situations and vitalities throughout Nagano Prefecture (Shinshu), central Japan. The tree sizes of each tree, such as tree height, stem girthes at stem base and at breast height and branch width, were measured. Also the general tree vigour, coverage of epiphytes on stem and large branches, situations around and under the tree and other circumstances were recorded. The folk story, histrical fact and / or belief concerned to the tree were also noted. Ten of 30 gigantic trees had their stem girthes at stem base more than 10 m, and nine of 30 trees their stem heights more than 30 m. The vitality of 2/3 trees surveyed were rated 'very vigorous' or 'normal vigour', while six trees were unhealty or moribund. Four of six deteriorated trees were Prunus species. A relatively clear relation of decreasing tree vitality to increasing coverage of epiphytes on stem and branch was found. The situations and vitalities of representative 11 trees were introduced and some plans of maintenance to conserve them were presented.
信州大学理学部の論文
1991-03-30