森林工程2018，Vol.34Issue(2)：1-5,5.
长白山森林土壤有机碳及其在团聚体密度组分中的分布
Organic Carbon Content and Its Distribution in Aggregate-density Fractions of Forest Soils in Changbai Mountain
摘要
Abstract
The stabilization of forest soil carbon pools is crucial to the globe carbon cycle. In order to study the mechanism of turnover and fixation of soil organic carbon, in this paper, the distribution of organic carbon in different aggregate size of surface soil of the coniferous-broad-leaved-Korean pine forest and Betula platyphylla secondary forest in Changbai Mountain was analyzed by dry sieving method. The aggregate-density fraction of organic carbon was further separated by density grouping method. The results showed that the distribution proportion of soil organic carbon in aggregate was 1~0.25、>2、1~2、<0.25 mm from high to low, and the proportion of heavy organic carbon (HF-C) was 77.0% in virgin Korean pine forest soils, which was significantly higher than that in broad-leaved secondary forest. The former had more stable organic carbon. Compared with free light fraction organic carbon (FLF-C) and occluded light organic carbon (OLF-C), HF-C was relatively stable in different size aggregates, which indicated that HF-C had a dominant function in stable organic carbon sequestration. In large aggregates, the FLF-C accounted for about 67.4%, which indicated that fresh organic matter directly involved in the formation of large aggregates.关键词
森林土壤/有机碳/密度组分/团聚体Key words
Forest soil/organic carbon/density fraction/aggregates分类
农业科技引用本文复制引用
孙颖,徐嘉晖,高菲,崔晓阳..长白山森林土壤有机碳及其在团聚体密度组分中的分布[J].森林工程,2018,34(2):1-5,5.基金项目
国家自然科学基金重点项目(41330530) （41330530）
国家"十三五"重点研发计划资助(2016YFA0600803) （2016YFA0600803）
