中文摘要：

在全球碳循环研究中,土壤有机碳（SOC）的作用倍受关注,而土壤无机碳（SIC）的研究相对较少。土壤无机碳是近地表环境中主要碳库之一,主要指土壤母岩风化过程中形成的土壤碳酸盐矿物态碳,是干旱、半干旱地区土壤碳库的主要形式。本文综述了土壤无机碳的组成、来源、成因模型及与全球碳循环特别是土壤有机碳的关系,并提出未来研究需要加强的几个方面。

英文摘要：

Soil organic carbon（SOC） is the only carbon pool in most researches of soil carbon pool concerning global carbon cycling,while soil inorganic carbon（SIC） is given very little attention.SIC is one of the main forms of carbon in earth sub-surface,especially in semi-and arid zones.Carbonate,either inherited from parent rocks or generated during soil formation processes,is the main form of SIC.This review describes the composition,sources,and formation model of soil carbonate,the relationships were analyzed between SIC and SOC in the global carbon cycling,and finally brought forward some suggestions relating the research of SIC.