应用生态学报2017，Vol.28Issue(10)：3111-3118,8.DOI:10.13287/j.1001-9332.201710.014
大兴安岭中段森林土壤的黑碳含量及其在不同粒级中的分布
Black carbon content and distribution in different particle size fractions of forest soils in the middle part of Great Xing'an Mountains, China
摘要
Abstract
Soil black carbon (BC) is considered to be the main component of passive C pool because of its inherent biochemical recalcitrance.In this paper,soil BC in the middle part of Great Xing'an Mountains was quantified,the distribution of BC in different particle size fractions was analyzed,and BC stabilization mechanism and its important role in soil C pool were discussed.The results showed that BC expressed obvious accumulation in surface soil,accounting for about 68.7％ in the whole horizon (64 cm),and then decreased with the increasing soil depth,however,BC/OC showed an opposite pattern.Climate conditions redistributed BC in study area,and the soil under cooler and moister conditions would sequester more BC.BC proportion in different particle size fractions was in the order of clay＞silt＞fine sand＞coarse sand.Although BC content in clay was the highest and was enhanced with increasing soil depth,BC/OC in clay did not show a marked change.Thus,the rise of BC/OC was attributed to the preservation of BC particles in the fine sand and silt fractions.Biochemical recalcitrance was the main stabilization mechanism for surface BC,and with the increasing soil depth,the chemical protection from clay mineral gradually played a predominant role.BC not only was the essential component of soil stable carbon pool,but also took up a sizable proportion in particulate organic carbon pool.Therefore,the storage of soil stable carbon and the potential of soil carbon sequestration would be enhanced owing to the existence of BC.关键词
森林土壤/黑碳/有机碳/土壤类型/迁移/稳定机制Key words
forest soil/black carbon/organic carbon/soil type/migration/stabilization mechanism引用本文复制引用
徐嘉晖,高雷,崔晓阳..大兴安岭中段森林土壤的黑碳含量及其在不同粒级中的分布[J].应用生态学报,2017,28(10):3111-3118,8.基金项目
本文由国家“十三五”重点研发计划项目(2016YFA0600803)资助 This work was supported by the National Key Research and Development Program of China (2016YFA0600803). （2016YFA0600803）
