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Soil CO2 Evolution and Nitrogen Availability on Abandoned Agricultural Fields at Mt. Kumdan  

Son, Yo-whan (Division of Environmental Science and Ecological Engineering, Korea University)
Ban, Ji-yeon (Division of Environmental Science and Ecological Engineering, Korea University)
Kim, Rae-Hyun (Division of Environmental Science and Ecological Engineering, Korea University)
Kim, Joon (Department of Atmospheric Sciences, Yonsei University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.5, no.2, 2003 , pp. 110-115 More about this Journal
Abstract
The iufluence of abandonment of agricultural fields on soil carbon and nitrogen dynamics is rarely addressed due to lack of appropriately paired sites. In this study, we identified three sites that have native forest and abandoned rice and crop fields at Mt. Kumdan near Seoul. Currently the vegetation of indigenous forest and the abandoned rice field is deciduous hardwood forest, while that of the abandoned crop field is deciduous shrub. We measured soil $CO_2$ evolution and inorganic N availability for the three sites from 25 July 2002 through 24 January 2003. Soil $CO_2$ evolution tracked seasonal soil temperature. Mean soil $CO_2$ evolution (g $CO_2$/$m^2$/hr) for the study period was 0.42 for the rice field to forest, 0.50 for the crop field to shrub, and 0.41 for the indigenous forest, respectively. Soil $CO_2$ evolution and soil temperature were not different among the sites; however, soil water content was significantly different. Soil water content had a very weak influence on soil $CO_2$ evolution. Inorganic resin N availability differed among the three sites and seemed to be related to soil moisture.
Keywords
abandoned agricultural fields; nitrogen availability; soil $CO_2$;
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