引用本文:唐浩竣,李海萍,陈文悦,唐家亮.基于科学知识图谱谈土壤有机碳研究进展[J].土壤学报,2019,56(3):541-552. DOI:10.11766/trxb201806160270
TANG Haojun,LI Haiping,CHEN Wenyue,TANG Jialiang.Research Progress on Soil Organic Carbon Based on Map of Scientific Knowledge[J].Acta Pedologica Sinica,2019,56(3):541-552. DOI:10.11766/trxb201806160270
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基于科学知识图谱谈土壤有机碳研究进展
唐浩竣1, 李海萍1, 陈文悦2, 唐家亮3
1.中国人民大学环境学院;2.中国地质大学(北京);3.山东省长岛县第一实验学校
摘要:
以“土壤有机碳”为主题词,从ISI Web of Science 数据库核心集中检索出1975—2018年文献2 258篇,运用CiteSpace知识图谱分析工具,对合著国家、作者、机构、学科领域、文献共被引网络以及关键词共现网络等进行可视化分析,对土壤有机碳的研究进展及演变趋势进行了图谱解读和追踪分析。结果表明:(1)土壤有机碳研究经历了起步、发展、稳定三个阶段;(2)土壤有机碳研究具有很强的学科交叉性,涉及环境生态学、环境科学、农业综合、农艺学、化学、农学及生态学等众多学科领域;(3)当前的研究方向主要为土壤有机碳储量与稳定土分离;(4)研究趋势已转为碳储量与耕地管理研究;(5)中国土壤有机碳研究起步较晚但发展迅速,在国际上处于重要地位。
关键词:  科学知识图谱  CiteSpace  土壤有机碳  可视化分析
基金项目:中央高校建设世界一流大学(学科)和特色发展引导专项资金
Research Progress on Soil Organic Carbon Based on Map of Scientific Knowledge
TANG Haojun1, LI Haiping1, CHEN Wenyue2, TANG Jialiang3
1.School of Environment & Natural Resources,Renmin University of China;2.China University of Geosciences(Beijing);3.Changdao County First Experimental School
Abstract:
【Objective】 In order to review progresses of the research on soil organic carbon, 2 258 articles on soil organic carbon published during the period from 1975 to 2018 and pooled into the core set of the ISI Web of Science database were cited for analysis.【Method】 Based on co-citation and pathFinder, CiteSpace was adopted to evaluate the collection of documents in a specific field to explore key paths and knowledge turning points of the evolution of the science field and collate key documents and quantify their corresponding features in the literature, so as to analyze potential dynamic mechanisms of the evolution of the discipline and search for development frontiers of the discipline. CiteSpace is composed mainly of cooperation network analysis (cooperations between authors, countries and institutions) co-occurrence network analysis (characteristic words, keywords, discipline categories) and co-citation analysis (documents, authors, co-cited journals) and some other functional modules. Data were retrieved, processed and introduced into CiteSpace, with time slicing set as 1975—2018 and Year Per Slice as 1 year; Country (Country), Author (Author) and Institution (Institution) selected as node type (Node Type) in turn; annual citation frequency (Top N) being 50 in rank; national, author and institutional maps generated and knowledge patterns, such as basic characteristics, cooperation characteristics, literature co-citation and keyword co-occurrence, analyzed.【Result】 (1) Except for a slight decline in 2006, 2011 and 2015, the annual average number of published articles showed an overall upward trend, indicating that the research on soil organic carbon continued increasing; (2) The study on soil organic carbon has gone through three phases: initiation, development, and stabilization; (3) The study on soil organic carbon is highly interdisciplinary, involving environmental ecology, environmental science, agricultural integration, agronomy, chemistry, agricultural science, ecology, and some other disciplines; (4) The current hot spots of the research are concentrated on soil organic carbon reserves and separation and stabilization of soils; (5) Research tends to deal with management of carbon reserves and cultivated land; and (6) The study on soil organic carbon in China started quite late, but has been developing rapidly, and is now in an important position internationally.【Conclusion】 As an effective tool for analysis of knowledge maps, CiteSpace can be used to clarify the cooperative relationships between countries, authors and institutions in the field. So far, a total of 56 countries have cooperative relations. Although China started late in the research, it has a huge number of researchers, stands on the top in number of published papers and has established close relations with other countries. The study on soil organic carbon involves a wide range of disciplines. Intercross of disciplines can be traced back to the 1990s, and the intercrossing of agriculture, soil, and environment sciences is relatively frequent. The research on soil organic carbon can be divided into 14 topics, with soil organic carbon reserves, mineral fertilization, separation of stable soils, stoichiometric analysis, and residual soil being frontiers of the research.
Key words:  Knowledge map  Citespace  Soil organic carbon  Visual analysis