Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Contribution of Root Respiration to Soil Respiration for Quercus acutissima Forest

상수리나무림의 토양호흡에 대한 뿌리호흡의 기여

  • Lee, Kyu-Jin (Dept. of Life Science, Kongju National University) ;
  • Won, Ho-Yeon (Dept. of Life Science, Kongju National University) ;
  • Mun, Hyeong-Tae (Dept. of Life Science, Kongju National University)
  • Received : 2012.08.24
  • Accepted : 2012.09.19
  • Published : 2012.10.31
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Abstract

A trenching method was used to determine the contribution of root respiration to soil respiration in Quercus acutissima forest in the vicinity of Gongju, Chungnam Province, Korea. $CO_2$ efflux in soil respiration plot($R_{control}$, $R_c$) and microblal respiration plot($R_{trenched}$, $R_t$) in Q. acutissima forest were measured from June 2011 to May 2012 by using IRGA soil respiration analyzer. Seasonal $CO_2$ efflux in $R_c$ and $R_t$ were higher in summer season than in winter season. In August, maximun $CO_2$ efflux in $R_c$ and $R_t$ was 1.345 and 0.897 g $CO_2\;m^{-2}\;hr^{-1}$, respectively. $CO_2$ efflux in $R_t$ was lower by 33.31% than that in $R_c$(P<0.05). In January, $CO_2$ efflux in $R_c$ and $R_t$ was 0.097 and 0.032g $CO_2\;m^{-2}\;hr^{-1}$, respectively. $CO_2$ efflux in $R_t$ was lower by 67.01% than that in $R_c$(P<0.01). The amount of annual $CO_2$ efflux from $R_c$ and $R_t$ was 4.320, 2.834kg $CO_2\;m^{-2}\;yr^{-1}$, respectively. There was a significant correlations between soil temperatures and soil respiration. Contribution of root respiration to total soil respiration in this Q. acutissima forest was 34.40%.

공주 근교의 상수리나무림을 대상으로 단근처리 방법을 적용하여 토양호흡량에 대한 뿌리호흡량의 기여율을 파악하였다. 토양호흡구(control plot)와 미생물호흡구(trenched plot)를 설치하고 2011년 6월부터 2012년 5월까지 IRGA 토양호흡측정기를 사용하여 $CO_2$발생량을 측정하였다. $CO_2$발생량은 하절기에 증가한 후 동절기에 감소하는 경향을 보였다. 토양호흡구와 미생물호흡구의 $CO_2$발생량은 8월에 가장 높았으며, 이때 토양호흡구와 미생물호흡구의 $CO_2$발생량은 각각 1.345, 0.897g $CO_2\;m^{-2}\;hr^{-1}$로 토양호흡구에 비해 미생물호흡구에서 33.31% 낮게 나타났다(P<0.05). $CO_2$발생량은 1월에 가장 낮았으며, 이때 토양호흡구와 미생물호흡구에서 각각 0.097, 0.032g $CO_2\;m^{-2}\;hr^{-1}$로 토양호흡구에 비해 미생물호흡구에서 67.01% 낮게 나타났다(P<0.01). 연간 $CO_2$발생량은 토양호흡구와 미생물호흡구에서 각각 4.320, 2.834kg $CO_2\;m^{-2}\;yr^{-1}$로 나타났다. $CO_2$발생량은 토양호흡구와 미생물호흡구에서 토양온도와 높은 상관관계가 있었다. 토양호흡구와 미생물호흡구간의 $CO_2$발생량 차이로 추정한 뿌리호흡량은 토양호흡량 중 약 34.40%를 차지하는 것으로 나타났다.

Keywords

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