Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Soil CO2 Efflux by Thinning Treatments of a Black Pine (Pinus thunbergii Parl.) Stand Disturbed by Pine Wilt Disease

소나무재선충병 발생 곰솔임분의 간벌에 따른 토양 호흡 동태

  • Choi, Eun-Jin (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Seo, Huiyeong (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Lee, Kwang-Soo (Southern Forest Resource Research Center, National Institute of Forest Science) ;
  • Yoo, Byung-Oh (Southern Forest Resource Research Center, National Institute of Forest Science) ;
  • Kim, Choonsig (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Cho, Hyun-Seo (Department of Forest Resources, Gyeongnam National University of Science and Technology)
  • 최은진 (경남과학기술대학교 산림자원학과) ;
  • 서희영 (경남과학기술대학교 산림자원학과) ;
  • 이광수 (국립산림과학원 남부산림자원연구소) ;
  • 유병오 (국립산림과학원 남부산림자원연구소) ;
  • 김춘식 (경남과학기술대학교 산림자원학과) ;
  • 조현서 (경남과학기술대학교 산림자원학과)
  • Received : 2015.08.31
  • Accepted : 2016.01.20
  • Published : 2016.03.31
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Abstract

This study was carried out to investigate the change on soil $CO_2$ efflux rates, soil temperature, soil water content and soil pH by thinning intensity treatments (heavy thinning, light thinning, control) of a black pine (Pinus thunbergii Parl.) stand disturbed by pine wilt disease in Wola National Experimental Forests in Jinju, Gyeongnam province. Monthly variations of soil $CO_2$ efflux rates were not significantly different between the thinning and the control treatments (P>0.05). The annual mean soil $CO_2$ efflux rates were $0.58g\;CO_2m^{-2}h^{-1}$ for the light thinning, $0.49g\;CO_2m^{-2}h^{-1}$ for the heavy thinning and $0.45g\;CO_2m^{-2}h^{-1}$ for the control treatments, respectively. There was a significant exponential relation between soil $CO_2$ efflux rates and soil temperature, but no correlation between soil water content or soil pH and soil $CO_2$ efflux rates. The values of $Q_{10}$ were 3.40 for the light thinning, 3.20 for the heavy thinning and 3.06 for the control treatments, respectively. The results indicate that soil $CO_2$ efflux rates in a black pine stand disturbed by pine wilt disease could be affected by thinning treatments.

경남 진주시의 남부산림자원연구소 월아시험림 내 소나무재선충병 발생 곰솔임분의 간벌 처리구를 대상으로 토양 이산화탄소($CO_2$) 방출량과 토양환경요인 변화를 조사하기 위하여 강도구, 약도구, 대조구를 설치하고 2012년 3월부터 2013년 2월까지 토양 $CO_2$ 방출량, 토양온도, 토양수분함량, 토양 pH 변화를 조사하였다. 토양 $CO_2$ 방출량의 월별 변화는 간벌처리구와 대조구 사이에 유의적 차가 없었다(P>0.05). 연 평균 토양 $CO_2$ 방출량의 경우 처리간 유의적인 차는 없었으나 약도구 $0.58g\;CO_2m^{-2}h^{-1}$, 강도구 $0.49g\;CO_2m^{-2}h^{-1}$, 대조구 $0.45g\;CO_2m^{-2}h^{-1}$ 순으로 약도구가 높게 나타났다. 토양 $CO_2$ 방출량은 토양온도와 유의적인 지수함수 관계(P<0.05)가 있었으나 토양수분과 토양 pH 와는 유의적인 상관관계가 없었다(P>0.05). $Q_{10}$ 값의 경우 약도구 3.40, 강도구 3.20, 대조구 3.06으로 약도구가 가장 크게 나타나 소나무재선충병 발생 곰솔임분의 간벌처리는 토양온도 상승과 함께 토양 $CO_2$ 방출에 영향을 미치는 것으로 나타났다.

Keywords

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