Biomass Production of Pinus densiflora forma erecta Uyeki by Planting Density and Its Allocation Chracteristics

식재밀도에 따른 강송의 Biomass 생산 및 배분 특성

  • 이돈구 (서울대학교 산림자원학과) ;
  • 권기철 (서울대학교 산림자원학과) ;
  • 김영환 (서울대학교 산림자원학과)
  • Published : 1999.06.01

Abstract

This study was conducted to examine biomass production and its allocation characteristics by the planting density for 12- year - old Pinus densiflora forma erecta Uyeki plantation located in Chilbo Experimental Forest of Seoul National University in Suwon, Kyonggj-do. Different sample trees were selected for harvest by the planting density as follows; six trees from 1.0m X 1.0m, five trees from 1.8m X 1.8m, four trees from 3.0m X 3.0m. Stem, previous year branches, current year branches, previous year needles and current year needles were weighed respectively with the stratified clipping method, and biomass production and its allocation characteristics were analyzed : (1) Total biomass of the above-ground was the highest at the planting density of 1.8m X l.8m and followed by 1.0m X l.0m. (2) The higher the planting density was, the lower the ratio of biomass in branches and needles. (3) As the planting density decreased, the moisture contents of stem and current year branches increased but those of needles and previous year branches decreased. (4) Maximum photosynthetic layer appeared in the upper portion of the tree at higher density plantation.