Bibliometric analysis of global research trends in biochar application to sandy soils
摘要
Due to their physical and chemical characteristics, sandy soils pose a challenge for agricultural production, requiring alternative conditioning practices, such as biochar, which can improve soil structure and optimize management. Therefore, the aim of this study aimed to perform a bibliometric analysis of the scientific production on this topic. A systematic search was conducted in the Web of Science (WoS) database using the descriptors: biochar OR bio-char OR biological charcoal OR agrichar AND sandy soil. The search terms were subsequently refined, and filters were applied for the document types “article” and “review.” A total of 543 articles published between 1992 and 2024 were identified. Over the past 32 years, this subject has experienced exponential growth, particularly after 2015. The first publication appeared in 1992, and currently there are 73 publications registered, being 2021 responsible for presenting the largest index of publications, confirming the consolidation of this field of research. The journal with the greatest relevance in terms of citations is Geoderma, followed by Chemosphere, while Agronomy-Basel stands out as a leading publication. Despite significant interaction among authors, institutions, and countries, China is the most prominent contributor, with the United States and Germany ranking as the top two countries in the number of publications. The literature indicates that biochar application is a promising strategy for improving sandy soil quality, particularly through enhanced water retention, improved nutrient dynamics, and reduced nutrient leaching. However, reported outcomes vary depending on feedstock, application rate, and environmental conditions, highlighting the need for continued research to optimize its use in sustainable agricultural systems.
Graphical Abstract