摘 要(英文)：Soil microbial biomass (Cmic) of three main vegetations in Dinghushan Biosphere Reserve (DBR), namely monsoon evergreen
broadleaf forest (BF), mixed forest (MF) and pine forest (PF), was studied in April, 2001 and March, 2002. They were 822,
588, 530 mg·kg-1 in BF, MF and PF, respectively; with significant difference between BF and MF or PF (P<0.01), and no significant
difference between MF and PF (P>0.05). Higher soil Cmic was accompanied by higher soil organic carbon (Corg). The ratios of Cmic to
Corg, which indicate the accumulation or loss of soil carbon, showed that soil carbon was in the stage of accumulation in all three
forests in the present study. More carbon turnover appeared in the soil with higher soil Cmic. The carbon turnover (t·hm-2·a-1) was
14.07 in BF, 11.45 in MF and 9.60 in PF, respectively. The metabolic quotient (mg·g-1·h-1), which implies the efficiency of carbon
utilization by soil microbes, was 0.59 in BF, 0.96 in MF and 1.33 in PF, respectively. These metabolic quotients indicated that carbon
utilization efficiencies were higher in BF and lower in PF.
鼎湖山主要植被类型土壤微生物生物量研究