近20年全球农业生产对地下水影响研究的热点与趋势

全球地下水开采总量的90%以上都被用于农业生产，地下水资源已成为事关全球粮食安全的重要战略资源。因此，明确全球农业生产对地下水影响研究的热点演进过程与未来趋势，对于灌溉农业的可持续发展和地下水资源的保护与利用具有重要意义。基于中国知网（CNKI）核心期刊数据库和Web of Science（WoS）数据库，通过可视化文献分析工具CiteSpace，对2000—2020年全球范围内农业生产对地下水影响研究领域的相关文献进行分析，总结该领域近20年的研究进展、研究热点和发展趋势。结果显示：在农业生产对地下水影响的研究中，CNKI和WoS发文量平均增速分别为1.45和53.7篇/a，美国和中国是该研究领域发文的主导国家，其发文量分别占总发文量的24.94%和15.70%；在全球各大研究机构中，中国科学院是该领域最具国际影响力的研究机构；农业面源污染和地下水健康风险评价是当前全球在该领域中的研究热点，并在人口激增、水资源匮乏、粮食短缺等以及全球气候变化的背景下将继续保持一定的热度；地下水超采是农业生产对地下水影响领域中重要的研究主题，Scanlon和Taylor等专家的高被引文章在该领域影响力较大。

Research hot spots and trends on the impacts of global agricultural production on groundwater in the past two decades

More than 90% of global groundwater exploitation is used for agricultural production, and groundwater has become an important strategic resource concerning global food security. Hence, understanding the research hot spots and the trends on the impacts of global agricultural production on groundwater is critical for sustainable irrigated agricultural development and groundwater resource protection and utilization. The article is based on China National Knowledge Infrastructure (CNKI) core journal database and Web of Science (WoS) database, the CiteSpace tool was employed to analyze the research papers concerning the impacts of agricultural production on groundwater globally from 2000 to 2020. This study aimed to summarize the frontier, hot spots, and trends of the research field in the past two decades. The results indicated that in the study of the impact of agricultural production on groundwater, the average annual increases of the number of CNKI and WoS papers reached 1.45 and 53.7, respectively. The United States and China were the leading countries in the research field on the impact of agricultural production on groundwater, accounting for 24.94% and 15.70% of published papers, respectively. Among the major research institutions in the world, Chinese Academy of Sciences was the most internationally influential academic institution. The themes of non-point agricultural pollution and groundwater health risk assessment both were the research hot spots worldwide, and would continue to be the hot research topics under the background of population increase, water resource shortage, food crisis and global climate change. Groundwater overexploitation was an important research theme in the field of the impacts of global agricultural production on groundwater, and the highly cited papers by experts Scanlon and Taylor et al were the most influential papers in this research field.