土壤有机碳是陆地碳库的重要组成部分,土地利用/覆被变化及土地管理通过影响土壤有机碳储量、组分、时空分布,进而影响全球碳循环和全球气候变化,是当前的研究热点。土地利用变化对土壤有机碳影响的研究已有很多,但基于文献计量视角的分析报道较少。以Web of Science数据库和CNKI数据库为数据源,通过文献计量学方法和Citespace软件平台,分析了1991~2014年土地利用变化与管理对土壤有机碳影响的研究进展及热点。研究表明:森林、草地、农田等土地利用类型及土地利用变化与管理对土壤有机碳的影响是研究的重点;森林、草地生态系统主要通过土地利用变化(林地转化为次生林、草地、耕地;草地过渡放牧或转化为耕地)影响土壤有机碳变化;农田主要通过土地管理(退耕还林还草、耕作方式、施肥等)来影响土壤有机碳变化;土壤有机碳变化研究选取的指标越来越具体化,模型多样化,但土壤有机碳模型研究还未成体系,土壤有机碳变化趋势预测是未来研究的重点。
英文摘要:
Soil organic carbon was an important component of the terrestrial carbon pool. Land use/cover change and land management influence the global carbon cycle and global climate change by changing the storage, components, and time and space distribution of soil organic carbon, thus, the impact of land use on soil organic carbon is one of the research highlights recently. Although there were a lot studies on the impact of land use on soil organic carbon, there was lack of summarization. Based on the method of literature metrology and the Citespace software, this paper performed a quantitative and qualitative analysis of the scientific literatures collected from Web of Science database on the impact of land use change and management on soil organic carbon during the period of 1991-2014. We summed up the research trend, present situation and progress about the impact of land use, land use change and management on soil organic carbon. It was also highlighted how converting natural forests to plantations or croplands, grasslands to croplands, and grazing intensively affected soil organic carbon.