남부지방 조경수종의 탄소저감과 계량모델†: - 동백나무, 배롱나무 및 가시나무를 대상으로 -

Abstract

This study quantified, through a direct harvesting method, storage and annual uptake of carbon from open-grown trees for three landscape tree species frequently planted in the southern region of Korea, and developed quantitative models to easily estimate the carbon reduction by tree growth for each species. The tree species for the study included <italic>Camellia japonica, Lagerstroemia indica</italic>, and <italic>Quercus myrsinaefolia</italic>, for which no information on carbon storage and uptake was available. Ten tree individuals for each species (a total of 30 individuals) were sampled considering various stem diameter sizes at given intervals. The study measured biomass for each part of the sample trees to quantify the total carbon storage per tree. Annual carbon uptake per tree was computed by analyzing the radial growth rates of the stem samples at breast height or ground level. Quantitative models were developed using stem diameter as an independent variable to easily calculate storage and annual uptake of carbon per tree for study species. All the quantitative models showed high fitness with <italic>r</italic>² values of 0.94-0.98. The storage and annual uptake of carbon from a <italic>Q. myrsinaefolia</italic> tree with dbh of 10 cm were 24.0 kg and 4.5 kg/yr, respectively. A <italic>C. japonica</italic> tree and <italic>L. indica</italic> tree with dg of 10 cm stored 11.2 kg and 8.1 kg of carbon and annually sequestered 2.6 kg and 1.2 kg, respectively. The above-mentioned carbon storage equaled the amount of carbon emitted from the gasoline consumption of about 42 L for <italic>Q. myrsinaefolia</italic>, 20 L for <italic>C. japonica</italic>, and 14 L for <italic>L. indica</italic>. A tree with the diameter size of 10 cm annually offset carbon emissions from gasoline use of approximately 8 L for <italic>Q. myrsinaefolia</italic>, 5 L for <italic>C. japonica</italic>, and 2 L for <italic>L. indica</italic>. The study pioneers in quantifying biomass and carbon reduction for the landscape tree species in the southern region despite difficulties in direct cutting and root digging of the planted trees.