Knowledge mapping analysis of Stipa breviflora desert grassland research hotspots and cycle evolution
This paper obtained literature data in the field of Stipa breviflora desert steppe from CNKI,and used the scientific knowledge map to draw the full-time high-frequency keyword co-occurrence map of S.breviflora desert steppe from 2003 to 2022,and the time-segmented high-frequency keyword co-occurrence map of every five years.By comparing the periodic evolution of high-frequency keywords in the whole period and time-segmented high-frequency keywords in the study of S.breviflora desert steppe,the overall research situation and hotspots of S.breviflora desert steppe in China,as well as the research hotspots,frontiers and changes of each cycle were identified.The results showed that:(1)The four research hot topics of S.breviflora desert steppe from 2003 to 2022 were:the study of plant community characteristics,the study of soil factors,the study of natu-ral factors,and the study of human factors.(2)Desert steppe,stocking rate,grazing and other topics were the hot research topics of S.breviflora desert steppe in each cycle with stable and little change.(3)Since 2008,the number and coverage of research hot topics of S.breviflora desert steppe increased significantly,and frontier hot topics such as soil nutrients,soil microorganisms,nitrogen deposition,and precipitation change appeared.
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