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KMID : 1024520100190020217
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Journal of the Environmental Sciences
2010 Volume.19 No. 2 p.217 ~ p.227
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CO2 Respiration Characteristics with Physicochemical Properties of Soils at the Coastal Ecosystem in Suncheon Bay
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Kang Dong-Hwan
Kwon Byung-Hyuk
Kim Pil-Geun
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Abstract
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This paper was studied CO2 respiration rate with physicochemical properties of soils at wetland, paddy field and forest in Nongju-ri, Haeryong-myeon, Suncheon city, Jeollanam-do. Soil temperature and CO2 respiration rate were measured at the field, and soil pH, moisture and soil organic carbon were analyzed in laboratory. Field monitoring was conducted at 6 points (W3, W7, W13, W17, W23, W27) for wetland, 3 points (P1, P2, P3) for paddy field and 3 points (F1, F2, F3) for forest in 10 January 2009. CO2 concentrations in chamber were measured 352～382 ppm for wetland, 364～382 ppm for paddy field and 379～390 ppm for forest, and the average values were 370 ppm, 370 ppm and 385 ppm, respectively. CO2 respiration rates of soils were measured -73～44 mg/m2/hr for wetland, -74～24 mg/m2/hr for paddy field and -55～106 mg/m2/hr for forest, and the average values were -8 mg/m2/hr, -25 mg/m2/hr and 38 mg/m2/hr. CO2 was uptake from air to soil in wetland and paddy field, but it was emission from soil to air in forest. CO2 respiration rate function in uptake condition increased exponential and linear as soil temperature and soil organic carbon. But, it in emission condition decreased linear as soil temperature and soil organic carbon. CO2 respiration rate function in wetland decreased linear as soil moisture, but its in paddy and forest increased linear as soil moisture. CO2 respiration rate function in all sites increased linear as soil pH, and increasing rate at forest was highest.
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KEYWORD
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Coastal ecosystem, Physicochemical property, Soil respiration, Carbon dioxide
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