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http://dx.doi.org/10.11626/KJEB.2014.32.4.389

The Effect of Rain Fall Event on $CO_2$ Emission in Pinus koraiensis Plantation in Mt. Taehwa  

Suh, Sanguk (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Park, Sungae (Natural Environment Research Division, National Institute of Environmental Research)
Shim, Kyuyoung (Natural Environment Research Division, National Institute of Environmental Research)
Yang, Byeonggug (Natural Environment Research Division, National Institute of Environmental Research)
Choi, Eunjung (Climate Change & Agroecology Division, National Academy of Agricultural Science)
Lee, Jaeseok (College of Bioscience and Biotechnology, Konkuk University)
Kim, Taekyu (Natural Environment Research Division, National Institute of Environmental Research)
Publication Information
Korean Journal of Environmental Biology / v.32, no.4, 2014 , pp. 389-394 More about this Journal
Abstract
This study was conducted to find out the soil $CO_2$ emission characteristic due to rain fall pattern and intensity changes. Using Automatic Opening and Closing Chambers (AOCCs), we have measured annual soil respiration changes in Pinus koraiensis plantation at Seoul National University experimental forest in Mt. Taehwa. In addition, we have monitored heterotrophic respiration at trenching sites ($4{\times}6m$). Based on the one year data of soil respiration and heterotrophic respiration, we observed that 24% of soil respiration was derived from root respiration. During the rainy season (end of July to September), soil respiration at trenching site and trenching with rainfall interception site were measure during portable soil respiration analyzer (GMP343, Vaisala, Helsinki, Finland). Surprisingly, even after days of continuous heavy rain, soil water content did not exceed 20%. Based on this observation, we suggest that the maximum water holding capacity is about 20%, and relatively lower soil water contents during the dry season affect the vital degree of trees and soil microbe. As for soil respiration under different rain intensity, it was increased about 14.4% under 10 mm precipitation. But the high-intensity rain condition, such as more than 10 mm precipitation, caused the decrease of soil respiration up to 25.5%. Taken together, this study suggests that the pattern of soil respiration can be regulated by not only soil temperature but also due to the rain fall intensity.
Keywords
soil respiration; heterotrophic respiration; trenching; rain fall interception;
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