自然公園における森林の風致的取り扱いについて

Abstract

In recently according to increase of demand for sightseeing, the number of visitors to the natural parks are increasing year after year.In natural park the forest is a important factor in landscape.At the Chubu-sangaku national park we investigated the forest constitution and what kind of forest are better from the view-point of landscape.In this area, forestation and cut down a forest are not take and the forest put in natural state, so stand growing to over-thick and beauty effect of forest is not bring out.Crown density of forest in this area is more than 50% in general and some time over 100%.Result of this investigation the worthy forest from the view-point of landscape is as follows.(1) The crown density of 28-47% is better as a forest constitution in national parks.(2) In light demanding tree like the white birch and the black alder the crown density is better under 30% in young stand, and 40-50% in old growth stand.(3) In case of the old age of katsura-trees and the elm-tree, although the crown density are 60% or more than that, the forest show light and magnificent apearance as a result of highness of trees.