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KMID : 0380120010240020087
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Korean Journal of Ecology
2001 Volume.24 No. 2 p.87 ~ p.91
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The Rate of Soil Respiration in Populus maximowiczii Stand on Volcano Mt. Usu, Northern Japan
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Moon Hyun-Shik
Masahiro Haruki
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Abstract
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The response of respiration rates of root, A_0 layer and mineral soil to varying environmental factors was studied in Populus maximowiczii stand (25-year-old) during the growing season of 1997. Soil temperature showed a pronounced seasonal course, in contrast to soil moisture. The mineral soil respiration was high in August. and root and A_0 layer respiration, were high in July. An exponential equation best described the relationships between soil temperature and mineral soil respiration. and total soil respiration (r=0.95 and 0.92, p＜0.001), respectively. In P maximowiczii stand, soil respiration rates were reduced by about 19% after removal of the A_0 layer, and by about 30% after removal of living root. Therefore, mineral soil respiration seemed to contribute gretly to the total soil respiration (50%).
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