Objective:Large old trees(LOTs)were the kind of special biological resources with both natural and cultural attributes,which were of great significance for scientific research,education and cultural inheritance.Visualization methods were applied to analyze the research progress,hotspots and frontiers in the field of LOTs in China since the new century.Methods:Relevant literatures on LOTs were retrieved from the CNKI database(limited to Chinese core and/or CSCD journals),and VOS-viewer was used to visually analyze the distribution of literature sources,authors and research institu-tions,and keywords.Results:The number of publications on LOTs research in China had gone through three stages of"start up-prosperity-decline",with the peak in 2013.Anhui Agricultural Scienc-es,Fujian Forestry Science and Technology,and Journal of Zhejiang Agricultural and Forestry Univer-sity had a relatively large number of publications.Highly cited papers showed that papers related to LOTs resource investigation accounted for a large proportion.The scholar relationship in LOTs research in China presented a pattern of few teams,few people and loose relationships.Conclusion:Further im-provement was needed in the current research on LOTs in China,with strengthened cooperation be-tween institutions and personnel.Research on aging mechanisms,genetic diversity,environmental cor-relation,large-scale spatial patterns and other topics might become the hotspots of LOTs research in the future.
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