基于Web of Science数据库的土壤呼吸知识图谱分析

以Web of ScienceTM核心合集数据库中1999 ~ 2019年有关土壤呼吸的6363篇文献作为数据源，借助CiteSpace知识图谱分析工具，对合著国家、作者、机构、学科分布、文献共被引网络及主题词共现网络等进行可视化分析。研究结果表明:①土壤呼吸研究的发文量经历了平稳增长、迅速增长和起伏增长三个阶段；②美国、法国、澳大利亚、瑞士等国家在土壤呼吸研究领域发文量较多，具有较大的影响力，中国土壤呼吸研究起步虽然较晚但发展迅速；③土壤呼吸研究主要集中在环境生态学（Environmental Sciences & Ecology）、农学（Agriculture）、环境科学（Environmental Sciences）、土壤学（Soil Science）等学科领域，具有显著的学科交叉性；④当前关于土壤呼吸研究热点主要集中在根际沉积和土壤异养呼吸方面；氮添加、气候变暖、冬小麦、温室气体排放是近年来土壤呼吸领域的研究前沿。

Knowledge Mapping Analysis of Soil Respiration Research Based on Web of Science

In order to review the research progresses on soil respiration, 6363 articles on soil respiration published from 1999 to 2019 in the core set of the Web of ScienceTM database were used as our data source. The CiteSpace knowledge map was used to clarify the cooperative relationships among countries, authors, institutions, discipline distribution, and to draw the network map of literature co-citation and term co-occurrence in the field. The results showed that: (1) The international soil respiration research experienced three phases: steady growth, rapid growth and fluctuating growth; (2) Countries such as the United States, France, Australia, Switzerland had strong influences on the field of soil respiration. The soil respiration research in China was started later but developed rapidly; (3) The study on soil respiration was highly interdisciplinary, involving Environmental Ecology, Agriculture, Environmental Science and Soil Science, and some other disciplines; (4) The current research hot spots were rhizodeposition and heterotrophic soil respiration, and in recent years, the frontier research in the field of soil respiration included nitrogen addition, climate warming, winter wheat, greenhouse gas emissions, etc.