Research Hotspot and Trend Analysis of Chinese Fir in 70 Years Based on Bibliometrics

In order to understand the research status, hotspots and development trends of Chinese fir after 1949, this paper uses the bibliometric analysis method, takes the China Infrastructure Engineering Journal Database as the data source, uses the CNKI database analysis tool and CiteSpace 5.8.R2 visualization software to carry out the bibliometric analysis of Chinese fir literature in the past 70 years from the aspects of the number of Chinese fir literature, subject distribution, researchers and institutions, influence and research hotspots.The results showed that the annual publication of Chinese fir literature showed an overall upward trend from 1949 to 2020, which could be divided into the initial stage of Chinese fir research (1949-1960), the exploration stage (1961-1994) and the promotion stage (1995-2020).The personnel engaged in the research of Chinese fir are mostly concentrated in colleges and universities and scientific research units, and are mainly distributed in the south of the Yangtze River.The keywords closely related to Chinese fir are ″mixed forest″, ″clone″, ″masson pine″, ″artificial forest″ and ″biomass″, which are the key contents of Chinese fir research in different periods. At present, the main hotspots of Chinese fir research are plantation directional cultivation, long-term productivity maintenance, near-natural management, global change response, large-diameter timber and decorative timber cultivation, multi-objective breeding, etc.Future research directions include the migration of Chinese fir under the background of global climate change, carbon sequestration in forest ecosystems, and innovation of Chinese fir germplasm resources based on biotechnology.