불암산 도시자연공원 상수리나무군락의 토양호흡 특성 연구 A study on the soil CO2 Efflux in Quercus acutissima stand at Mt. Bulam urban nature park
pp.762-768
본 연구에서는 2013년 06월부터 2014년 05월까지 1년간 불암산 도시자연공원 상수리나무군락에서 토양호흡량과 미기후 분석을 실시하였다. 토양호흡량과 미생물호흡량은 각가 28.14±7.99∼582.47±318.51mg, 12.32±8.04∼415.71±159.92mg CO2˙m-2˙h-1의 범위로 조사되었다. 또한, 토양호흡량은 계절별로 여름, 가을, 겨울, 봄에 각각 1169.1, 454.81, 72.08, 494.23g CO2˙m-2˙month-1로, 미생물호흡량은 526.20, 340.09, 45.13, 374.9g CO2˙m-2˙month-1로 조사되었다. 연간 토양호흡량과 미생물호흡량은 각각 2190.22g CO2˙m-2˙yr-1, 1286.33g CO2˙m-2˙yr-1로 조사되었다. 또한, 토양호흡량, 미생물호흡량과 환경요인과의 상관관계에 대해 지수함수를 이용한 회귀식을 적용하여 분석하였다. 토양호흡과 미생물호흡 모두 토양온도와 대기온도에서 정의 상관관계를 보였으나, 토양수분함량과 광량에서는 매우 낮은 상관관계를 나타내었다. 토양호흡량과 미생물호흡량간의 차이로 추정한 뿌리호흡량은 토양호흡량 중 약 33.60%를 차지하는 것으로 나타났다.
The purpose of this study is to analyze the soil CO2 efflux and micro-climate of a preserved forest area located in a Mt. bulam urban nature park Quercus acutissima stand from June 2013 to May 2014. The research showed that the soil and heterotrophic CO2 efflux were 28.14±7.99 to 582.47±318.51 and 12.32±8.04 to 415.71±159.92mg CO2˙m-2˙h-1, respectively. In addition the seasonal soil CO2 efflux of summer, autumn, winter, spring were 1169.1, 454.81, 72.08 and 494.23g CO2˙m-2˙month-1, respectively. On the other hand, the seasonal heterotrophic CO2 efflux were 526.20, 340.09, 45.13 and 374.9g CO2˙m-2˙month-1, respectively. Moreover, the annual soil and heterotrophic CO2 efflux was found to be 2190.22 and 1286.33g CO2˙m-2˙yr-1, respectively. The exponential function was also utilized for the regression analysis in order to correlate the environmental factors with the soil and heterotrophic CO2 efflux. It was found out that both air and soil temperatures were positively correlated with the soil and heterotrophic CO2 efflux. However, the amount of solar radiation and soil moisture has showed low correlation for both types of CO2 efflux. Contribution of root CO2 efflux to total soil CO2 efflux in this Quercus acutissima stand was 33.60%.