云冷杉红松林和蒙古栎红松林对土壤活性有机碳含量的影响.

The Picea sp.-Abies sp.-Pinus koraiensis forests(PAP) and Quercus mongolica-Pinus koraiensis forests(QP) in the Heilongjiang Fenglin National Nature Reserve were selected as the research objects, the contents of soil microbial biomass carbon(MBC) and soil water soluble organic carbon(WSOC) were measured to discuss the effects of different forest vegetation on the content of soil labile organic carbon. The results showed: the content of two types of soil labile organic carbon under the two forest types decreased with soil depth deepening. There is no significant difference between PAP and QP in MBC and WSOC(P>0.05). The ratio of MBC to soil organic carbon(SOC) and the ratio of WSOC to SOC in QP were higher than that of PAP. The soil organic carbon density(SOCD) in PAP was significantly higher than that of QP(P<0.05). For the PAP and QP which were composed of specific tree species in Northeast temperate forest, the results showed that there was no significant difference in the content of soil labile organic carbon, but the ratio of soil labile organic carbon to total organic carbon in QP was higher than that of PAP, that meant the stability of soil carbon pool and soil carbon sequestration of PAP was better than that of QP. [ABSTRACT FROM AUTHOR]