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The forest ecosystem is a repository of terrestrial ecosystem carbon , environmental protection , have an extremely important role to maintain the continued development of the global carbon cycle and human reveal subtropical forest ecosystem soil respiration variation and carbon emissions characteristics , this article select in Jian'ou Wanmulin Nature Reserve six ( Castanopsis Zhejiang桂, carlesii fine altingia , the sightseeing wood and submerged camphor ) natural evergreen broadleaf forest as the research object , the use of Li- 8100 on its soil respiration rate for a period of one year ( 2009 ) the field positioning observational studies , the results showed that soil respiration was apparent seasonal trend , high summer and low winter . Single-factor model (R = aebT or R = aWc ) fitting found that soil moisture and soil respiration rate did not achieve significantly related ( p- lt ; 0.05 ) , soil temperature and soil respiration rate reached significantly related ( p- lt ; 0.05 ) , while the double factor model (R = aebTWc) fitting results with a single factor (R = aebT) model is similar to the 61.0% of the common interpretation of the changes in soil respiration -9517 % . Under different forest soil respiration annual emissions are significant differences in different natural communities of micranthum sightseeing wood, Castanopsis , Guangxi, Zhejiang carlesii and soil Altingia , breathing the whole year of carbon emissions were 1632.067 , 1341.016,1508.634,1684.492,1816.324,1853.830 gC · m-2 · a-1, which sightseeing wood of natural forest soil respiration lowest emissions . Annual emissions of soil respiration and fine root biomass was highly significant linear (p lt; 0.01), but with soil moisture , soil temperature , amount of litter and soil organic carbon and microbial biomass carbon were not significantly correlated ( p lt; 0.05).
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