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中文摘要：
土壤水溶性有机碳（WSOC）是土壤碳循环中最活跃的组成部分之一。采用TOC—VCPN总有机碳仪测定了武夷山4个典型海拔地的植被土壤水溶性有机碳的含量，分析了土壤水溶性有机碳与土壤因子的关系。结果表明：不同林分间土壤水溶性有机碳含量随海拔上升而增加，随土层深度的增加而减少；土壤水溶性有机碳含量占总有机碳的比值介于0．02％～0．16％，以高山草甸10～25cm土层最高，常绿阔叶林25～40cm土层最低；不同海拔梯度的土壤水溶性有机碳与总有机碳、微生物量碳、土壤湿度、全氮存在显著线性正相关，与土壤温度、pH之间无相关性。
英文摘要：
Soil water-soluble organic carbon （WSOC） is an important component in soil carbon cycling. The soil water-soluble organic carbon among four vegetation types with an elevation gradients and the correlations between soil WSOC and some other soil factors were analyzed. The results revealed ： （ 1 ） The amount of WSOC became bigger when the elevation went higher, and it became smaller when the soil layers became deeper; （2）The percentage of WSOC to TOC varied from 0.02 to 0.16, the highest was Alpine meadow soil layer of 10--25 cm, the lowest was evergreen broadleaf forest 25--40 cm soil layer; （3）In each site and different soil layers, WSOC positively correlated with TOC, SMBC, soil moisture, and TN, respectively. However, WSOC was not found to be associated with soil temperature and pH. The results provided theoretical foundation for further elucidate soil carbon circle character among different vegetation types with an elevation gradients.
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