초록

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Abstract ▼ AI-Helper

In order to investigate the annual mean equilibrium moisture content(EMC), the equilibrium moisture content investigated were the desorbed and adsorbed equilibrium moisture content with two end-matched samples for red pine (Pinus densiflora S. et Z.), Douglas fir (Pseadotsuga menziesii Franco), oak ...

In order to investigate the annual mean equilibrium moisture content(EMC), the equilibrium moisture content investigated were the desorbed and adsorbed equilibrium moisture content with two end-matched samples for red pine (Pinus densiflora S. et Z.), Douglas fir (Pseadotsuga menziesii Franco), oak (Quercus mongolica Fischer) and red lauan (Shorea spp.) in instrument screen at forest experiment station located in Seoul, Chuncheon, Daejeon, Kyungju, Jinju and Gwangju area for four years (1970. 1 - 1973. 12). The results summarized were as follows. 1. The annual mean desorbed equilibrium moisture content of red pine, Douglar fir, oak and red lauan were 14.8, 13.7, 14.0 and 14.2 percent respectively and higher than the annual mean adsorbed equilibrium moisture content of those species. 2. The annual mean desorbed - and adsorbed equilibrium moisture content in central areas (Seoul, Chuncheon, Daejeon) were higher than those in southern areas (Kyungju, Jinju, Gwangju). 3. On the whole, the monthly mean desorbed - and adsorbed equilibrium moisture content were lowest in April and highest in August though difference of month in areas. 4. Average and range of annual national equilibrium moisture content was 12.3 ~ 14.2 ~ 15.7 percent for desorbed equilibrium moisture content and 11.3 ~ 13.2 ~ 14.7 percent for adsorbed equilibrium moisture content and 12.0 ~ 14.1 ~ 16.4 percent for calculated equilibrium moisture content based on tempera ture and humidity.