한국농림기상학회지, 제 15권 제3호(2013) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 15, No. 3, (2013), pp. 186~190
DOI: 10.5532/KJAFM.2013.15.3.186
ⓒ Author(s) 2014. CC Attribution 3.0 License.


금산장기생태조사지 낙엽활엽수림내 토양이산화탄소 방출량의 연변동

김춘식(1), 이임균(2), 임종환(2), 박병배(2), 천정화(2)
(1)경남과학기술대학교 산림자원학과, (2)국립산림과학원

(2013년 08월 27일 접수; 2013년 09월 15일 수정; 2013년 09월 24일 수락)

Annual Variation of Soil CO2 Efflux in a Broadleaved Deciduous Forest
of the Geumsan (Mt.) Long-Term Ecological Research Site

Choonsig Kim(1), Im Kyun Lee(2), Jong Hwan Lim(2), Byung Bae Park(2), Jung Hwa Chun(2)
(1)Department of Forest Resources, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea
(2)Korea Forest Research Institute, Seoul 130-012, Korea

(Received August 27, 2013; Revised September 15, 2013; Accepted September 24, 2013)

ABSTRACT
Soil respiration in forest ecosystems play an important role in global carbon cycle. This study was carried out to determine the annual variation of soil CO2 efflux for 4 years in a broadleaved deciduous forest of the Geumsan (Mt.) Long-Term Ecological Research (GLTER) site in Southern Korea. The soil CO2 efflux in the GLTER site showed annual variations with the fluctuations of annual mean soil temperature, but not with those of soil water content. The annual mean soil CO2 efflux except for winter season was 0.32 g CO2m-2h-1 for 2008, 0.40 g CO2m-2h-1 for 2009, 0.41 g CO2m-2h-1 for 2007, and 0.54 g CO2m-2h-1 for 2010. The lowest soil CO2 effluxin 2008 was associated with the lowest soil temperature (12.0oC) in comparison with those of other years (13.0-13.5oC). The exponential relationships between monthly soil CO2 efflux and the corresponding soil temperature at the soil depth of 20 cm were significant (R2 = 0.31-0.75, P < 0.05). The results indicate that the annual variation of soil CO2 efflux was attributed to the variations of soil temperature rather than soil water content in the GLTER site.

Keyword: Carbon cycle, LTER, Soil CO2 efflux, Soil respiration

MAIN

적요

산림생태계 토양 호흡량은 지구탄소순환에 중요한 역할을 한다. 본 연구는 금산 장기생태 연구 조사지 낙엽활엽수림을 대상으로 4년 동안 토양 이산화탄소 방출량의 연 변동을 조사하였다. 금산 장기생태 연구 조사지 월별 토양 이산화탄소 방출량은 토양온도 변화와 밀접한 관계가 있었으며 토양수분함량과는 뚜렷한 경향을 보이지 않았다(P > 0.05). 동절기(1월과 2월, 2007년의 경우 1월부터 3월)를 제외한 평균 토양 이산화탄소 방출량은 2008년 0.32 g CO2 m−2 h−1, 2009년 0.40g CO2 m−2 h−1, 2007년 0.41g CO2 m−2 h−1, 2010년 0.54 g CO2 m−2 h−1 순이었으며, 2008년의 연 평균토양온도는 12.0°C로 다른 연도의 토양 온도 13.0-13.5°C에 비해 유의적으로(P<0.05) 낮았다. 토양 이산화탄소 방출량과 토양 20cm 깊이의 토양온도는 지수함수 관계가 있었으며 (R2 = 0.31-0.75, P < 0.05), 토양수분함량은 토양 이산화탄소 방출량과 유의적인 관계가 없었다(P > 0.05). 본 연구 결과에 따르면 금산장기생태연구 조사지 토양 이산화탄소 방출량의 연 변동은 토양수분보다는 토양온도 변화와 관계가 있었다.

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