earticle

영어

As the connecters of greenspace networks, urban trees in street (UTS) accumulate atmospheric carbon during growth via photosynthesis processes. However, excessive management of UTS including pruning causes negative effects to return absorbed carbon to the atmosphere. This study identified the management practices of pruning and developed regression models that easily estimates annual carbon emission by the pruning amount of each tree species. The pruning practices of UTS was surveyed targeting trees planted in Chuncheon and Daegu through maintenance data, interviews with managers and actual measurements. For measuring the pruning amount, Ginkgo biloba and Platanus occidentalis with a high relative planting frequency for which pruning is mainly carried out, were selected. The annual pruning frequency for Ginkgo biloba and Platanus occidentalis was 2 times, and the amount of gasoline consumption from operating the pruning equipment was 166.7 mL per tree. All the regression models by the pruning showed fitness with r2 values of 0.75 or larger. The pruning amount and carbon emissions of Ginkgo biloba and Platanus occidentalis increased accordance with the size. The carbon emissions from Platanus occidentalis (8.5 kg/yr, at dbh 30 to 39 cm) were larger than that from Ginkgo biloba (2.8 kg/yr, at dbh 30 to 39 cm). The results of this study can serve as useful base data necessary to quantify the net carbon uptake of UTS in the future.