Research Progress of Different Fertilization Models in Farmland Based on Bibliometrics

Xiao WANG Wenzhao LI Xiong YAN Changling SUI Zhuang ZHAO Fengxue GONG

Abstract In order to grasp the research status of different fertilization modes in Chinas farmland more comprehensively, with papers in core journals of Chinese Peking University collected in CNKI database from 2003 to 2022 as the main research object, this paper analyzed the research status of different fertilization modes from the perspectives of annual number of published papers, published journals, keywords and highly cited papers applying the bibliometrics research method. This study provides reference for the research in this field.

Key words CNKI; Core journals; Different fertilization modes; Bibliometrics

DOI:10.19759/j.cnki.2164-4993.2024.02.013

Soil fertility is the basic attribute and essential feature of soil, and serves as an index for measuring the ability of soil to provide nutrients and biomass needed by plants, which can comprehensively reflect the physical, chemical and biological properties of soil［1］. Different fertilization modes will have an important impact on soil fertility and environment. Bibliometrics is to perform systematical analysis on the situation of research fields by paying equal attention to theory and application, and it has the advantages of objectivity, quantification and high macro-efficiency, and is widely used in various fields［2］. In order to accurately understand the research focus and development trend of different fertilization modes in farmland in recent 20 years, based on the bibliometric analysis method, this paper analyzed different fertilization modes in farmland in China with annual number of published papers, published journals, keywords and highly cited papers as the main indicators, so as to make clear the research methods and directions and provide reference for scholars in their research fields.

Materials and Methods

Data source

China Knowledge Network (CNKI) was selected as the statistical source, and the data source only included Chinese literature.

Search method

The advanced retrieval method was selected to search documents within the retrieval scope of academic journals, using "different fertilization modes" as the subject word. The time range was from January 2003 to December 2022, and the source type was academic journals.

Data processing

With the help of advanced retrieval in CNKI database, a total of 473 papers in core journals were retrieved with the subject of "different fertilization modes", and then the data were exported to Microsoft Excel 2021 software for statistical analysis.

Results and Analysis

Distribution of annual number of published papers

The distribution of year and number of published papers can reflect the development process and present situation of the field. The distribution of papers related to different fertilization modes from 2003 to 2022 is shown in Fig. 1, and there were a total of 473 papers, showing an overall upward trend, with an annual average of 23.7 papers. 2003-2008 was the initial stage, and the number of papers published was relatively small. In 2009-2013, it was a stable stage, with about 25 papers basically. In 2014-2022, the number of published papers reached its peak, up to 47. It is because in the early 21st century, peoples understanding of fertilizer lagged behind production practice, and production practice lagged behind production experiments and theoretical research. In recent years, with the emphasis on ecological environment protection in China and the new policy of environmentally friendly fertilization, the research on different fertilization modes is increasing.

Distribution of papers published in major journals

Dissection of periodicals is helpful to observing the distribution of their research fields, and can be used to analyze the importance attached by Chinese journals to different fertilization models. According to the results of bibliometrics, there were 90 kinds of journals publishing papers in the research field of different fertilization models in China from 2003 to 2022. It can be seen from Table 1 that the journal with the largest number of papers was Chinese Journal of Soil Science (74 papers), which was 1.90 times more than Research of Soil and Water Conservation (39 papers), which ranked second. In the top 10 journals in terms of number of published papers, journals in the fields of soil, soil and water conservation, agriculture and ecology were all involved.

Distribution of high-frequency keywords

Keywords refer to the words used by a single media when compiling and using search, and are simple words used to express the core content of literature. Through the statistical analysis of keywords, we can quickly understand the subject, hotspot and development trend of the literature.From 2003 to 2022, the total keywords or subject terms in the literature related to different fertilization modes were arranged in descending order, and the top 10 high-frequency keywords were selected for statistical analysis. As shown in Table 2, "organic fertilizer" (64 papers) and "NPK" (20 papers) appear frequently, which shows that rational utilization of organic fertilizer and NPK fertilizer is closely related to different fertilization modes. Different fertilization modes are the key indicators that affect the "fertilizer use efficiency".

Distribution of the top 10 most frequently cited papers

"Citation frequency" refers to the number of times that a paper has been cited by other papers after publication, which is a sign to measure the recognition and influence of the paper, and can also reflect the research direction of the paper in this field to some extent. From 2003 to 2022, the statistics of the top 10 most frequently cited papers on different fertilization models in China areshown in Table 3. These 10 papers were published in nine journals, and the most frequently cited one was from Chinese Journal of Ecology, indicating that organic carbon groups and aggregates are hot topics in the field［3］. The top 10 most frequently cited papers mainly focused on the analysis of crop soils such as vegetables, rice, tea and corn, and meanwhile, through positioning experiments, the long-term different fertilization models for red soil and fluvo-aquic soil were studied.

Conclusions and Prospects

In this paper, the bibliometrics method was applied to statistically analyze core documents in the research field of different fertilization models from 2003 to 2022. There were 473 papers published in this research field, showing an overall upward trend, with an average annual number of 23.7. The journal with the most published papers was Chinese Journal of Soil Science (74 papers), and the keywords with higher frequency were "organic fertilizer" (64 times) and "NPK" (33 times), indicating that rational utilization of organic fertilizer and NPK fertilizer is closely related to different fertilization modes. The most frequently cited one came from Chinese Journal of Ecology, which shows that organic carbon groups and aggregates are hot topics in the field. The top 10 most frequently cited papers mainly focused on the analysis of crop soils such as vegetables, rice, tea and corn.

Agricultural Biotechnology2024

References

［1］ JIAN ZJ, NI YY, XU J, et al. Soil fertility in the Pinus massoniana forests of China［J］. Acta Ecologica Sinica, 2021, 41(13): 5279-5288. (in Chinese).

［2］ RAN JW, LI X, TIAN YF, et al. A bibliometric analysis of the research status of soil quality evolution under different management modes［J］. Journal of Agricultural Big Data, 2020, 2(4): 95-106. (in Chinese).

［3］ YANG CM, OUYANG Z, DONG YH. Organic carbon fractions and aggregate stability in aquatic soil under different fertilization［J］. Chinese Journal of Ecology, 2005(8): 887-892. (in Chinese).