黑碳在土壤有机碳生物地球化学循环中的作用

黑碳是化石燃料或生物有机体不完全燃烧形成的一种含有芳香环的高聚物,碳元素含量在60%以上,另含有氢、氧、氮、硫等元素。新近的研究证实,黑碳通过在缓慢的土壤有机碳库中的循环,对全球碳和氧的地球生物化学循环起到极其重要的作用。本文对黑碳的基本概念、理化性质、在土壤中的作用及测定方法进行了综合评述,提出了开展土壤黑碳研究的重要性和必要性。以期为我国开展土壤黑碳的相关研究提供理论参考。

Roles of Black Carbon in the Biogeochemical Cycles of Soil Organic Carbon

Black carbon is one of the ubiquitous impure materials produced by incomplete combustion of fossil fuel or biomass. The content of carbon element in black carbon exceeds 60%, and hydrogen, oxygen, nitrogen and sulfur are also the main elements in black carbon molecules. Recent findings have revealed the implications of black carbon in global biogeochemical cycles of carbon and oxygen through its contribution to the slow cycling of soil organic carbon pool. This paper summarized the definition, chemical and physical properties, and functions of black carbon in soils. Some methods for the estimation of black carbon in soil samples were also discussed. Importance and requirements for the study of black carbon in soils were proposed so as to provide introductive knowledge and theoretical reference for the study of soil carbon sequestration in China.