中文摘要：

采用野外调查、取样和室内实验分析相结合的方法，研究韩江流域典型区4种主要林分土壤有机碳储量和全量养分库的分布特征。结果表明：（1）研究区4种林分土壤有机碳平均含量在8．48～11．93g／kg之间，常绿阔叶林最高，其次为针阔混交林，桉树林最小。土壤有机碳含量随深度增加而递减，其中阔叶林垂直变化幅度最大，达72．35％。（2）4种林分土壤碳密度差异显著，其各土层变化范围为1．78～5．74kg／m^2，土壤碳密度亦随深度增加而减少。对于整个土层而言，各林分土壤碳密度在13．41～16．74妇／m^2之间。（3）不同养分库在4种林分之间表现的规律性不同。有机碳和各全量养分储量随土壤深度增加均呈减小趋势，有机碳和全氮表现尤其明显。

英文摘要：

By using the research method of field investigation, soil sampling and laboratory analysis, the soil organic carbon storage and nutrients pools for the four main forest types in typical area of Hanjiang River Basin have been discussed. The results are as follow： （1） The average soil organic carbon content for the four forest types is 8.48g.kg^-1-1l.93g.kg^-1, the soil organic carbon content in evergreen broad-leaved forest is highest but lowest in eucalypt forest. Soil organic carbon contents generally decrease with depth, and the variation in broad-leaved forest is highest （72.35 %）. （2） Soil carbon density in the four forest types change greatly, with a average of 1.78 kg.m^-2-5.74 kg.m^-2 for five soil depth intervals. Soil carbon density decrease generally with the depth, too. For the whole soil section, soil carbon density in all forest types varies from 13.41 kg.m^-2 to 16.74 kg.m^-2. （3） The soil nutrients pools have different representations among the four forest types. There are trends of soil organic carbon and total nutrients decreased with soil depth, particularly the soil carbon and total nitrogen.