岩溶区土地利用变化对土壤有机碳与岩溶碳汇的影响研究进展  

Effects of land use change on soil organic carbon and karst carbon sink in karst area: A review

作　　者：蓝家程[1] 肖时珍[1,2] 

机构地区：[1]贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心,贵阳550001 [2]西南大学地理科学学院,重庆400715

出　　处：《生态学杂志》2017年第9期2633-2640,共8页Chinese Journal of Ecology

基　　金：十三五"国家重点研发计划课题(2016YFC0502603;2016YFC0502606);国家自然科学基金项目(41601584;41673129);贵州省科学技术基金(黔科合J字[2015]2111号);贵州省科技合作计划项目(黔科合LH字[2015]7775号);贵州师范大学2015年博士科研启动项目(600204)资助

摘　　要：土地利用变化对陆地生态系统碳循环的影响是当今全球碳循环和气候变化研究的热点。土地利用变化对土壤有机碳含量、组分及稳定性产生影响,从而影响土壤CO_2,进而控制岩溶地质过程的碳汇效应。本文综述了岩溶区土地利用变化对土壤有机碳与岩溶地质过程的影响,阐明了岩溶区土地利用变化对土壤有机碳及其组分影响的过程与机理,土地利用变化对岩溶地质过程影响的土壤CO_2浓度调控机制、水循环影响及无机酸干扰等影响机制。提出了土壤固碳的团聚体归宿和分配,团聚体物理保护机制及钙的化学稳定机制是当前岩溶土壤有机碳深化的方向;土壤CO_2、水循环和无机酸在土地利用变化过程中以何种关系共同影响岩溶碳汇强度;水生光合作用利用DIC形成的稳定有机质与DIC、AOC通量的关系及其对土地利用变化的响应机理是岩溶碳循环前沿领域;而石漠化治理对岩溶碳循环的影响及相关固碳增汇技术的研究是需要重视的工作。Effects of land use change on terrestrial ecosystem carbon cycle has been becoming a hot topic research of global carbon cycle and climate change. Land use changes can influence soil organic carbon content, fractions and stability, thus affecting soil CO2 concentration, and then controlling carbon sink effects of karst geological process. This paper summarizes the effects of land use change on soil organic carbon and karst geological process in karst area, and clarifies the processes and mechanisms of land use change effects on soil organic carbon and its fractions, and the mechanisms of soil CO2 control, water cycle and inorganic acid disturbance, which influence karst geological process induced by land use change. The aggregate fate and distribution of soil carbon sequestration, mechanisms of physical protection in soil aggregate, and calcium chemical stabilization mechanisms need to be further studied in future. More attention should be paid to how soil CO2, water cycle and inorganic acid influence karst carbon sink intensity in the process of land use change. The relationships between stable organic matter derived from aquatic photosynthesis by which dissolved inorganic carbon （DIC） was used, and DIC and assimilable organic carbon （AOC） fluxes, and the mechanisms of their response to land use change will become a frontier of karst carbon cycle research. In addition, the influences of rocky desertification control on karst carbon cycle and the technologies for increasing carbon sequestration need to attain more attention.

关 键 词：土地利用变化 土壤有机碳 碳循环 岩溶作用 岩溶碳汇 

分 类 号：S153.6[农业科学—土壤学]