Abstract:

To comprehensively understand the research progress and frontier trends in the field of seedling substrate research using solid waste both domestically and internationally, CiteSpace software was used to conduct a visual analysis of the literature in this field. The results showed that over the past 14 years, the overall number of Chinese and English publications in this research field had been on an upward trend, with China, Brazil, the United States, Spain, and Italy being countries with a higher number of English publications. The main publishing institutions in this field included Chinese Academy of Sciences, Council for Research in Agriculture and the Analysis of the Agricultural Economy-Research Centre for Engineering and Agro-Food Processing, Spanish National Research Council, Chinese Academy of Agricultural Sciences, the United States Department of Agriculture, etc. Among them, Chinese Academy of Sciences occupied an important position, indicating that China had a strong academic influence and significant contributions in this research field. In terms of cooperation, the cooperation mode of domestic and foreign authors in this field is mostly small group mode, lacking communication and cooperation with other scientific research team members. According to keywords and emergent words analysis, the research content in this field could be divided into two stages and one path. The first stage was to study the types of solid wastes that could replace the substrate raw materials and use scientific methods to explore the effects of the proportion of solid wastes added to the substrate and the composition index of the growth medium on seedlings growth; in the second stage, the research focused on the assessment and management of solid waste treatment systems, the emission of ammonia nitrogen and greenhouse gases in the process of solid waste treatment, and the removal of antibiotics and heavy metals contained in solid waste. The research path is: "types of solid wastes that can replace substrate raw materials→ratio of solid wastes in the substrate→ growth of seedlings in the growth medium mixed with solid waste→management and evaluation of solid waste treatment system→changes in ammonia nitrogen and greenhouse gas emissions during solid waste treatment→removal of antibiotics and heavy metals in solid waste". This path can serve as a research hotspot and frontier in this field.

Key words: solid waste, seedling substrate, research progress, CiteSpace, literature analysis, frontier trends