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http://dx.doi.org/10.9715/KILA.2017.45.5.097

Changes in Growth Rate and Carbon Sequestration by Age of Landscape Trees  

Jo, Hyun-Kil (Dept. of Ecological Landscape Architecture Design, Kangwon National University)
Park, Hye-Mi (Dept. of Landscape Architecture, Graduate School, Kangwon National University)
Publication Information
Journal of the Korean Institute of Landscape Architecture / v.45, no.5, 2017 , pp. 97-104 More about this Journal
Abstract
Greenspace enlargement through proper landscape planting is essential to creating a low carbon society. This study analyzed changes in stem diameter growth rates(DGR), ratios of below ground/above ground biomass(B/A), and carbon sequestration by age of major landscape tree species. Landscape trees for study were 11 species and 112 individuals planted in middle region of Korea. The DGR and B/A were analyzed based on data measured through a direct harvesting method including root digging. The carbon sequestration by tree age was estimated applying the derived regression models. The annual DGR at breast height of trees over 30 years averaged 0.72 cm/yr for deciduous species and 0.83 cm/yr for evergreen species. The B/A of the trees over 30 years averaged 0.23 for evergreen species and 0.40 for deciduous species, about 1.7 times higher than evergreen species. The B/A by age in this study did not correspond to the existing result that it decreased as tree ages became older. Of the study tree species, cumulative carbon sequestration over 25 years was greatest with Zelkova serrata(198.3 kg), followed by Prunus yedoensis(121.7 kg), Pinus koraiensis(117.5 kg), and Pinus densiflora (77.4 kg) in that order. The cumulative carbon sequestration by Z. serrata offset about 5% of carbon emissions per capita from household electricity use for the same period. The growth rates and carbon sequestration for landscape trees were much greater than those for forest trees even for the same species. Based on these results, landscape planting and management strategies were explored to improve carbon sequestration, including tree species selection, planting density, and growth ground improvement. This study breaks new ground in discovering changes in growth and carbon sequestration by age of landscape trees and is expected to be useful in establishing urban greenspaces towards a low carbon society.
Keywords
Low Carbon; Tree Species; Biomass Ratio; Cumulative; Planting;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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