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对江苏苏南地区不同林龄阶段杉木人工林土壤总有机碳、水溶性有机碳、易氧化碳及其与土壤基本理化性质的关系进行了研究,结果表明:随着林龄增加,土壤总有机碳含量呈现先降低后增加的变化,过熟林阶段最高、中龄林阶段最低,水溶性有机碳与易氧化碳含量总体表现出与总有机碳较为一致的变化特征,二者占总有机碳的比例没有稳定变化。2种活性有机碳之间、活性有机碳与总有机碳、全氮、碳氮比呈显著相关,与全硫、土壤水分、pH、容重相关关系不显著,但在不同林龄阶段的表现有所不同。杉木林土壤有机碳在不同林龄阶段可能对森林碳循环起着不同的作用。
The relationship between soil total organic carbon, water-soluble organic carbon and carbon dioxide and their relationship with soil physico-chemical properties was studied in different age stages in southern Jiangsu Province. The results showed that with the increasing of age, total organic matter Carbon content showed the first decrease and then increased, the highest in over-mature forest stage, the lowest in middle-aged forest stage. The contents of water-soluble organic carbon and readily oxidizable carbon showed generally consistent changes with total organic carbon. Both of them accounted for the total organic carbon The ratio did not change steadily. There was a significant correlation between active organic carbon and total organic carbon, total nitrogen and carbon to nitrogen ratio and no significant correlation with total sulfur, soil moisture, pH and bulk density, but there were Different. Soil organic carbon in Chinese fir plantations may play different roles in forest carbon cycle at different stand ages.