한국농림기상학회지 (Korean Journal of Agricultural and Forest Meteorology)

  • 제23권2호
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  • Pages.89-99
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  • 2021
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  • 1229-5671(pISSN)
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  • 2288-1859(eISSN)
한국농림기상학회 (Korean Society of Agricultural and Forest Meteorology)
권호 표지
DOI QR코드

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소나무와 굴참나무 임분의 가지 분해율과 탄소 및 질소 동태 비교

Comparisons of Decomposition Rates, Carbon and Nitrogen Dynamics of Branches in Pinus densiflora and Quercus variabilis Stands

  • 최병길 (경상국립대학교 산림자원학과) ;
  • 백경원 (경상국립대학교 산림자원학과) ;
  • 김형섭 (고려대학교 환경생태공학과) ;
  • 손요환 (고려대학교 환경생태공학과) ;
  • 김춘식 (경상국립대학교 산림자원학과)
  • Choi, Byeonggil (Department of Forest Resources, Gyeongsang National University) ;
  • Baek, Gyeongwon (Department of Forest Resources, Gyeongsang National University) ;
  • Kim, Hyungsub (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yowhan (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Kim, Choonsig (Department of Forest Resources, Gyeongsang National University)
  • 투고 : 2020.07.15
  • 심사 : 2021.05.26
  • 발행 : 2021.06.30
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초록

본 연구는 경상남도 산청과 진주 지역으로부터 서로 인접하여 생육하고 있는 소나무와 굴참나무를 대상으로 기질의 특성, 임분 종류, 토양 및 기상 환경요인 등이 가지의 분해율과 탄소 및 질소 동태에 어떠한 영향을 끼치는지 알아보기 위해 수행하였다. 직경 2.0~4.0cm, 길이 10cm의 가지 시료를 30cm × 30cm 크기의 매쉬 백에 넣은 후 2018년 5월 각 임분의 임상에 매설하였으며 2018년 8월과, 11월, 그리고 2019년 2월과, 5월에 각 조사구에서 회수하여 가지의 분해율과 탄소 및 질소 동태를 조사하였다. 매설 12개월 후 가지 분해율은 산청-소나무(4.49 %) < 진주-소나무(5.75 %) < 산청-굴참나무(20.01 %) < 진주-굴참나무(24.68 %) 순서로 나타나 두 지역 모두 굴참나무 가지가 소나무에 비해 빠른 분해를 보였다. 탄소 및 질소의 경우 굴참나무는 순 무기화를 나타냈으며, 소나무는 탄소 및 질소의 축적 및 저장이 나타나 수종 간 다른 경향을 보였다. 본 연구 결과에 따르면 서로 인접하여 생육하고 있는 두 수종의 분해율과 탄소 및 질소 동태는 지역·환경적 요인보다 수종 간 초기 질소 농도, C/N율과 같은 기질의 특성이 더 큰 영향을 미치는 것으로 나타났다.

This study was carried out to understand how factors of decomposition such as quality of the substrate (tree species), forest types, and soil·meteorological conditions affect decomposition rates and dynamics of carbon (C) and nitrogen (N) of branches in adjacent Pinus densiflora and Quercus variabilis stands in Sancheong and J inju in Southern Korea. The branch bags (30 cm × 30 cm) with branch samples (a diameter of 2.0 - 4.0 cm and length of 10 cm) were placed on the forest floor at each stand in May 2018. The branch bags were collected in August and November 2018, February and May 2019, respectively. The decomposition rates of branches in P. densiflora stands were 4.49 % for Sancheong, and 5.75 % for Jinju. Whereas, the decomposition rates in Q. variabilis were 20.01 % for Sancheong, and 24.68 % for Jinju, respectively. The decomposition of branches was more rapid in Q. variabilis compared with P. densiflora in both regions. C and N in decomposed branches were more mineralized in Q. variabilis, whereas C and N were more accumulated in P. densiflora. These results indicated that the decomposition rates, C and N of decomposed branches may be affected by differences in substrate quality such as initial N concentration and C/N ratio rather than differences between both regions including different environmental factors.

키워드

과제정보

본 연구는 한국 임업진흥원의 "신기후체제 대응 산림분야 국가 온실가스 인벤토리 산정체계 및 탄소계정 고도화 연구(R1707942)"와 "국토교통부/국토교통과학기술진흥원(과제번호: 20UMRG-B158194-01)"의 지원에 의해 수행되었습니다.

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