Abstract:
The black land of Northeast China is the "stabilizer" and "ballast stone" of the national grain production. Serious soil erosion declines both the thickness and quality of the black soil, which directly threatens the national food security. Retrieving 662 Chinese research publications in the CNKI database and 189 English research publications in the Web of Science core database as the object with bibliometric methods, the knowledge map of soil erosion in the black soil area of Northeast China was drawn by CiteSpace and VOSviewer softwares. The main published journals, funding sources, core authors and teams were identified, the research hotspots and development trends in different periods were sorted out, and the influencing factors behind them were revealed. The results showed that: ① The number of Chinese papers published on this topic increased rapidly since 2003, and the number of papers published in 2003−2021 accounted for 91.6% of the total. The top 3 journals were
Transactions of the Chinese Society of Agricultural Engineering,
Acta Pedologica Sinica and
Transactions of the Chinese Society for Agricultural Machinery. The English publication started late, and the top 3 journals were
Soil and Tillage Research,
Catena and
Geoderma. Research funding was mainly from the National Natural Science Foundation of China. ② The representatives in the earlier studies were ZHANG Xiaoping with the Northeast Institute of Geography and Agroecology, the Chinese Academy of Sciences (CAS), and CAI Qiangguo with the Institute of Geography and Resources, CAS. The top 3 scholars in Chinese literature were ZHENG Fenli, HAN Xiaozeng and ZHANG Xingyi, and the top 3 scholars in English literature were ZHANG Xingyi, LIU Xiaobing and LIU Gang. ③ "Process and Mechanism of Soil Water Erosion", "Assessment of Temporal and Spatial Changes of Soil Erosion Supported by GIS and RS", "Soil Degradation and Conservation Tillage", "Water and Soil Conservation and Land Productivity", "Gully Development and Cultivated Land Protection", "Soil Erosion and Soil Quality", "Soil Erosion Rates", and "the Impact of Wind and Freeze-thaw on Hydraulic Erosion" were research hotspots in different periods. ④ "Artificial Simulation of Rainfall", “GIS and RS”, “Soil Erosion Model” and “
137Cs and
210Pb Nuclide Tracer” were the main research methods. Composite erosion process and mechanism, regional soil erosion prediction model development, soil erosion control measures and effects, the relationship between soil erosion degradation and land productivity were the focus of future research.