Through using the CNKI knowledge network service platform,the study conducts the method of bibliometrics,takes biochar as the research topic,uses the advanced retrieval method,takes papers collected in CNKI database from 1992 to 2022 as the research objects,quantitatively analyzes 7504 valid papers,sorts out the hot spots and development process of biochar research,presents the basic status quo of biochar field,and analyzes the frontier trends of biochar research.The results show that from 1992 to 2022,the researches on biochar in China show good development trend,and the largest number of publications in 2021 is 1316.The research level of biochar in China mainly focuses on applied basic research and technical research,and related disciplines mainly involve environmental science and resource utilization and basic agricultural science.At present,the mainstream fields of biochar research in China are agriculture,environmental science,ecology and chemistry.The future research on biochar in China mainly focuses on the adsorption of heavy metals by biochar and the remediation of soil by biochar.Among them,future researches will focus on the migration and transformation of biochar and in-situ remediation,the water management of biochar,effects on soil enzyme activity and soil pH,and the improvement of the properties of biochar characteristics of biochar combined and other materials.
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