Bibliometric Insights into the Use of Biochar as a Soil Amendment: A Study Based on Dimensions AI Database (2001–2024)

Abstract

Biochar, a carbon-rich material derived from biomass through pyrolysis or other techniques, has gained significant attention as a soil amendment due to its potential to enhance soil fertility, agricultural production, and restoration of the environment. This bibliometric analysis utilizes the "Dimensions. AI" database to explore global research trends on biochar as a soil amendment from 2001 to 2024. After screening of 17975 articles, 17780 relevant articles were selected and subjected to bibliometric analysis using R-Studio and VOSviewer software. The findings revealed a continuous increase in research output over time, with China leading in publication volume and international collaborations, followed by the United States and India. Zhejiang University appears as the most prolific university, having a strong research relationship with the University of Chinese Academy of Sciences and other institutions or research organisations.  The Science of the Total Environment is recognized as the leading journal in this domain, having the highest h- index. Among the most cited publications, Lehmann’s review paper – “Biochar effects on soil biota – A review” published in the year of 2011 received the highest number of citations. Overall, the bibliometric analysis highlights the expanding research interest in biochar application for sustainable agriculture and environment conservation. Future studies are expected to further explore its long- term benefits and practical applications of biochar in soil management and climate change mitigation.