한국조경학회지 (Journal of the Korean Institute of Landscape Architecture)

  • 제42권5호
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  • Pages.64-72
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  • 2014
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  • 1225-1755(pISSN)
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  • 2288-9566(eISSN)
한국조경학회 (The Korean Institute of Landscape Architecture)
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생산형 녹지 중 사과나무 과수원의 탄소흡수 및 배출

Carbon Uptake and Emissions of Apple Orchards as a Production-type Greenspace

  • Jo, Hyun-Kil (Dept. of Landscape Architecture, Kangwon National University) ;
  • Park, Sung-Min (Dept. of Horticultural Science, Kangwon National University) ;
  • Kim, Jin-Young (Dept. of Landscape Architecture, Graduate School, Kangwon National University) ;
  • Park, Hye-Mi (Dept. of Landscape Architecture, Graduate School, Kangwon National University)
  • 투고 : 2014.08.01
  • 심사 : 2014.10.08
  • 발행 : 2014.10.31
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초록

본 연구는 생산형 녹지로서의 과수원을 대상으로 사과나무에 의한 탄소의 저장 및 연간 흡수를 산정하고, 재배과정에서 관리에 기인하여 발생하는 연간 탄소배출량을 파악하여 탄소저감 효과를 계량화하였다. 연구대상 과수원에서 유목에서 성목에 이르는 일정 간격의 근원직경 크기를 고려한 수목을 구입하여, 근굴취를 포함하는 직접수확법에 의해 개체당 부위별 및 전체 생체량을 산정하고 탄소저장량을 산출하였다. 근원부의 줄기 원판을 채취하여 직경생장을 분석하고 연간 탄소흡수량을 산정하였다. 관리에 따른 연간 탄소배출은 전정, 제초, 관수, 시비, 병충해 방제 등을 포함하는 관리자료의 구득, 관리자 면담 및 부분 실측을 바탕으로 계량화하였다. 근원직경을 독립변수로 생장에 따른 사과나무 단목의 탄소저장과 연간 탄소흡수를 계량화하는 활용 용이한 계량모델을 개발하였다. 사과나무의 탄소저장량과 연간 탄소흡수량은 모두 직경생장과 더불어 증가하였고, 직경급 간 그 차이도 직경이 커질수록 증가하는 경향이었다. 근원직경 10 및 15cm인 사과나무 단목은 각각 9.1 및 21.0kg의 탄소를 저장하고, 연간 1.0 및 1.6kg의 탄소를 흡수하는 것으로 나타났다. 연구대상 과수원의 단위면적당 탄소저장량과 연간 탄소흡수량은 각각 3.81t/ha, 0.42t/ha/년이었고, 연간 탄소배출량은 1.30t/ha/년이었다. 즉, 관리 관련 연간 탄소배출량은 연간 탄소흡수량보다 약 3배 더 많았다. 연구결과를 토대로, 생산형 녹지에 적용 가능한 관수, 농약 및 비료의 효율적 적용을 포함하는 저탄소형 관리방안을 모색하였다. 본 연구는 아직 부진했던 뿌리 생체량의 실측과 탄소배출의 구체적 인벤토리를 통해 탄소계량 관련 정보를 구축하는 새로운 초석을 제공한다.

This study quantified the storage and annual uptake of carbon by apple trees in orchards as a production-type greenspace, and computed the annual carbon emissions from apple cultivation. Tree individuals in the study orchards were sampled to include the range of stem diameter sizes. The study measured biomass for each part including the roots of sample trees through a direct harvesting method to compute total carbon storage per tree. Annual carbon uptake per tree was quantified by analyzing the radial growth rates of stem samples at ground level. Annual carbon emissions from management practices such as pruning, mowing, irrigation, fertilization, and use of pesticides and fungicides were estimated based on maintenance data, interviews with managers, and actual measurements. Regression models were developed using stem diameter at ground level (D) as an independent variable to easily estimate storage and annual uptake of the carbon. Storage and annual uptake of carbon per tree increased as D sizes got larger. Apple trees with D sizes of 10 and 15 cm stored 9.1 and 21.0 kg of carbon and annually sequestered 1.0 and 1.6 kg, respectively. Storage and annual uptake of carbon per unit area in study orchards were 3.81 t/ha and 0.42 t/ha/yr, respectively, and annual carbon emissions were 1.30 t/ha/yr. Thus, the carbon emissions were about 3 times greater than the annual carbon uptake. The study identified management practices to reduce the carbon footprint of production-type greenspace, including efficient uses of water, pesticides, fungicides, and fertilizers. It breaks new ground by including measured biomass of roots and a detailed inventory of carbon emissions.

키워드

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