冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究

Abstract

Hillsides in the Kwanak arboretum area were composed mainly of coarse sandy loam having relatively high proportion of rough weathered debris derived from the Daebo granite geologically. Owing to heavy soil erosion resulted to shallow soil depth and heavy rock exposures, the growing trees in this type of' surface soil are very poor in their growth. For woody plant vegetation establishment in this montain area, it is urgent to recover the fertility of soil and the growth of existing trees. For this purpose, in spring and autumn season in 1983-84 the fertilization experiment was conducted with the 4 principal native species(Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing in this denuded forest land, and the effects of fertilized tree plots were more prominent than the control plot in both height and root-collar diameter growth. Therefore, the accelerating measures of vegetation rehabilitation through conservation of existing trees and recovery of tree growth by forest fertilization practices, besides forest engineering measur es and soil erosion control afforestation measures, could be acceptable as the measures for the recovery of denuded forest land in Mt. Kwanak area.