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KMID : 0368420060490030231
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Journal of Plant Biology
2006 Volume.49 No. 3 p.231 ~ p.236
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Soil respiration and FDA hydrolysis following conversion of abandoned agricultural lands to natural vegetation in Central Korea
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Son Yo-Whan
Seo Keum-Young
Kim Rae-Hyun
Kim Joon
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Abstract
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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.
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KEYWORD
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crop field, indigenous forest, microbial activity, rice field, soil moisture, soil temperature
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