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KMID : 0613820100200091353
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Journal of Life Science
2010 Volume.20 No. 9 p.1353 ~ p.1357
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A Study on the Soil Respiration in Cutting and Uncutting Areas of Larix leptolepis Plantation
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Lee Kyu-Jin
Mun Hyeong-Tae
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Abstract
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Quantification of the ecosystem respiration is essential in understanding the carbon cycling of natural and disturbed landscapes. Soil respiration and some environmental factors which affect soil respiration were investigated in a Larix leptolepis plantation inKongju, Korea. Soil respiration was measured at midday of the 15th and 30th day of every month from May to December in a non-cutting area (Control) and a cutting area (Treatment) with IRGA Soil Respiration Analyzer. Throughout the study period, average soil temperature and water content were 23.3±0.5℃ and 27.76±7.12% for control, and 25.9±3.1℃ and 24.55±5.12% for treatment, respectively. There was a positive correlation (R²=0.8905) between soil respiration and soil temperature in the study area. However, there was no significant correlation between soil respiration and soil moisture (R²=0.4437). The seasonal soil respiration increased in the summer and decreased in the winter. In August, maximum soil respirations in the control and treatment areas were 0.82±0.13 and 1.32±0.10 gCO₂ㆍ-2ㆍr-1, respectively. Total amounts of CO₂ evolution in the control and treatment areas from May to December in 2008 were 2,419.2 and 3,610.8 CO₂ gㆍm-2, respectively. The amount of soil respiration in the treatment area was 49.3% greater than in the control. Increased soil respiration in the treatment area may be due to increased soil temperature, which drives increased microbial decomposition. According to our present investigation, forest cutting will increase the atmospheric CO₂ by increasing soil respiration.
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KEYWORD
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CO₂ evolution, cutting area, Larix leptolepis, soil respiration, soil temperature
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