Using bibliometric methods, this paper analyzes the total amount and keyword composition among 910 studies in the field of farmland abandonment published in the Web of Science database from 1992 to 2019. According to the usage of keywords, existing studies are reviewed from the three aspects of monitoring and mapping, driving forces and influencing factors, and effects assessment and trade-off. The results show that: (1) At present, the extraction and mapping of abandoned farmland data mainly rely on household surveys and remote sensing technology, and combing NDVI time series with spatial information can provide abandoned farmland data with high precision. (2) The driving forces and influencing factors of cultivated land abandonment have been summarized in terms of extent, sources and attributes, respectively. Cultivated land marginalization is the fundamental driving force of cultivated land abandonment, labor migration is the direct driving force, and changes in socio-economic factors are the main driving forces. (3) The environmental effects of cultivated land abandonment are spatially heterogeneous, and temporal-spatial differences, the landscape environment, climate, cultivation and topographic features will all play decisive roles in shaping the ultimate environmental effects. Studies of trade-offs between the impacts of cultivated land abandonment mainly focus on ecosystem service function and value, while the role of spatial background is often ignored. Based on a systematic review of existing literature, this paper suggests that future efforts should carry out large-scale investigations on abandoned cultivated land at the national level, conduct multi-scale research on the driving forces of land abandonment, and conduct trade-off research on the effects of land abandonment based on national conditions.
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Vol. 12 • No. 2