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Soil respiration and FDA hydrolysis following conversion of abandoned agricultural lands to natural vegetation in Central Korea

한국식물학회지 2006년 49권 3호 p.231 ~ 236
 ( Son Yo-Whan ) - Korea University Division of Environmental Science and Ecological Engineering

 ( Seo Keum-Young ) - Korea University Division of Environmental Science and Ecological Engineering
 ( Kim Rae-Hyun ) - Korea University Division of Environmental Science and Ecological Engineering
 ( Kim Joon ) - Yonsei University Department of Atmospheric Sciences

Abstract


Soil respiration and the hydrolysis of fluorescein diacetate (FDA) as a measure of total microbial activity were investigated in central Korea, at three sites that had been changed from abandoned agricultural lands to natural vegetation: rice field conversion to forest (RF), crop field conversion to shrub (CS), and indigenous forest (IF). Seasonal variations in soil respiration were affected by soil temperature and, to a lesser extent, by photosynthetically active radiation (PAR) and soil moisture. The mean annual rate of soil respiration (g CO2 m-2 hr-1) was highest at CS (0.36), followed by IF (0.29) and RF (0.28), whereas the total annual soil respiration (kg CO2 m-2 yr-1) was 2.82 for CS, 2.46 for IF, and 2.40 for RF. Mean annual FDA hydrolysis (μg FDA min-1 g-1 dry soil) was higher at RS (4.56) and IF (4.61) than at CS (3.65). At all three land-use change sites, soil respiration was only very weakly correlated with FDA hydrolysis.

키워드

crop field; indigenous forest; microbial activity; rice field; soil moisture; soil temperature
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