정주지의 메타세쿼이아와 양버즘나무의 탄소 배출 계수 및 바이오매스 상대생장식 개발 = Development of Carbon Emission Factors and Biomass Allometric Equations for Metasequoia glyptostroboides and Platanus occidentalis in Urban Forests

다국어 초록 (Multilingual Abstract)

This study aimed to develop biomass allometric equations and estimate carbon emission factors, such as the wood density, biomass-expansion factor, and root-to-shoot ratio, for Platanus occidentalis and Metasequoia glyptostroboides planted in urban areas. Twenty M. glyptostroboides and 25 P. occidentalis trees were harvested, and the dry weights and stem volumes of stems, branches, leaves, and roots (>5 mm) were measured. The wood densities of M. glyptostroboides and P. occidentalis were 0.293 ± 0.008 g cm-3 and 0.509 ± 0.018 g cm-3, and the biomass-expansion factors were 1.738 ± 0.031 and 1.561 ± 0.035. The root-to-shoot ratios were 0.446 ± 0.009 and 0.402 ± 0.012. The uncertainty tests (coefficient of variation, %) gave 2.8% and 3.5% values for wood density, 1.8% and 2.3% for biomass-expansion factor, and 2.1% and 2.9% for root-to-shoot ratio, respectively. Among the developed allometric equations, Model Ⅰ using the diameter at breast height (DBH) was suitable. The allometric equations of M. glyptostroboides and P. occidentalis above ground were y = 1.679 (DBH)1.315 and y = 0.505 (DBH)1.896, and the allometric equations of the root and total were y = 0.746 (DBH)1.315, y = 0.301 (DBH)1.751, y = 2.422 (DBH)1.316, and y = 0.787 (DBH)1.858. If the carbon-emission factors of this study and biomass allometric equations of the three developed models are used to estimate the carbon storage and biomass of urban forests, errors caused by not considering the use of fixed factors and the environmental differences can be reduced.

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