Phytosociological study of the secondary furest under vegetation management in relation to soil types

Abstract

Secondary forests distributed in suburbs were maintained for agricultural producing purposes, but recent change of their reason for existence to recreational purposes brought the necessity of establishment of the new management system from the view point of conservation. Therefore it is needed to grasp dynamics of plant community owing to the management practice on every natural sites as fundamental for the vegetation management
The case study was carried out to grasp relationship among soil types, degree of management and composition of species in the Musashi National Government Park and its outskirts. Tab. 4 shows composition of species on every site classified by dominant species, soil types and degree of management. Ardisia Japonica, Quercus myrsinaefolia and Castania crenata are considered to decrease, Pinus densiflora and Albizia Julibrissin increase with increase of weeding degree irrespective of natural sites. But some species appear and disappear according to not only weeding condition but also the soil types and/or dominant species. For example, Miscanthus sinensis appears on the yellow brown forest soils or the Low humic Andosols with relatively highly weeded stands. And “adaptability to soils” and “germination types” of each species are considered to have relation with these difference of species composition according to the natural sites and management condition.