Studies on the roadside planting along park-road

Abstract

This study aims at finding out thescientif is method about roadside planting in national park. Vegetation survey was practised on the Ome Road (Chichibu-tama national park, Tokyo prefecture) and the Odaigahara Drive-way (Yoshino-kumano national park, Nara prefecture).
From the point of phytosociological view, the location (Standort) of the roads was mentioned. Consideration studied here is as follows.
1. The relation between natural park planning and phytosociological survey.
(i) Natural park planning is to be based on phytnsociological results and vegetation map, to conserve forest communities, which are the most important elements of landscape in natural park. Vegetation map in scale 1: 10, 000-50, 000 with vegetation units of association (Assoziation) and subassociation (Subassoziation) is suitable.
(ii) After natural park plan is authorized, location of road must be adapted in detail to natural environment around the road. Phytosociolgical research is also necessary to this purpose. Road must be located carefully, not to injure forest communities and to promote restoration of vegetation. Vegetation map in scale 1: 2, 000-10, 000 with vegetation units of association, subassociation, and variety (Variante) is suitable.
2. The relation between planning for roadside planting and phytosociological survey.
(i) After road is located, vegetation survey is requested to organize the road and surrounding forest communities phytosociologically. Forest communities and their mantle and sleeve communities must be researched to make up for 1.-(i) and (ii). The process of planning for roadside planting is as follows.
(1) Analysis and diagnosis of the planting environment on roadside
(a) To make existing vegetation map
(b) To make potential natural vegetation map of today
(2) Selection of the usefull species
(a) To systematize the potential natural vegetations of today and their substitution vegetations
(b) To select the usefull species in main species of the vegetations
(c) To group the species according to each use Combining (1) and (2), the planning for roadside planting is made.
(ii) Finally, the problems of maintenance remain. After planting on the roadside, it is necessary to research the process of succession periodically and to make a suitable management on each stage of succession.