| Soil is a huge carbon pool. Forest soil respiration is an important part of the soil respiration in terrestrial ecosystems, the variation of which will bring far-reaching on balance of global carbon recycle. Precise measurement of soil respiration and research the mechanism is the most basal and urgent problem in global change. The air current method is used to measure soil respiration of broad-leaved Korean pine forest, Also research the dynamic variation and its control factor. The result of research show that there were "one peak" daily dynamics of soil respiration according with the daily dynamic of soil temperature in the broadleaved-Korean pine forest. The maximum value of soil respiration appears at about 12: 0014: 00pm, The minimum value of soil respiration appears at about 6: 00am, Meanwhile, Seasonal variation of soil respiration is obvious. The value of soil respiration" exhibited July >August>September >October >November>April> March>February>January. The extent of soil respiration dynamic variation of winter is less than other seasons, In winter, the soil respiration is almost stop, the soil temperature and soil water both keep lower level. The maximum value of all-year soil respiration is 5.479μmol/m-2 s that appears in the first ten days of August. The minimum value of all-year soil respiration is 0.0029μmol m2 s that appears in the first ten days of January. There is significant (p<0.01) exponential relationships between soil respiration rates and soil and air temperatures. However, the former relationship is more significant than the latter. The effect of soil water content on soil respiration was complex and there was no evident relationship between them. The all-year quantum of carbon release from the soil is 8811.776kg hm-2 a-1 obtain from the regression equation that was built by the soil temperature and soil respiration. The Q10 value of broadleaved Korean pine forest is 3.85.
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