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Contribution of Root Respiration to Soil Respiration for Quercus acutissima Forest  

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)
Publication Information
Korean Journal of Environment and Ecology / v.26, no.5, 2012 , pp. 780-786 More about this Journal
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%.
Keywords
SOIL $CO_2$ EFFLUX; HETEROTROPHIC RESPIRATION; AUTOTROPHIC RESPIRATION;
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