Abstract:

Soil is an important basic resource for human survival and social development, and is an important component of natural ecosystem. The research on soil nutrients and soil biology has theoretical significance. Although there are more and more related studies, the systematic literature review is lacking and the understanding of the development trend and hotspot evolution characteristics of the research field is insufficient. In this paper, based on literature data of CNKI database, we conducted cluster visualization analysis on the number of publications, author groups, publication institutions, keywords and emergence of literature by the CiteSpace, a bibliometrics software. The results show that the number of papers published on the relationship between soil nutrients and soil fauna has increased each year since 2001, and has remained relatively stable since 2016. Research institutions in China are mainly colleges and universities, such as Nanjing Agricultural University, University of Chinese Academy of Sciences and China Agricultural University, and Nanjing Soil Institute of Chinese Academy of Sciences is also a main research group in this field. Soil quality and community structure were the two most prominent research hotspots in soil nutrient-earthworm research in 2001-2021, and the research on soil health has been a new trend since 2020.

Key words: soil, nutrient, earthworm, knowledge mapping, bibliometrics