我国农作物重金属研究进展的CiteSpace知识图谱分析

CiteSpace Knowledge Graph Analysis of Research Progress on Heavy Metals in Crops in China

本文运用CiteSpace软件对2004—2023年CNKI中文期刊收录的有关农作物重金属研究的304篇学术论文进行了可视化分析。结果显示,中国地质科学院地球物理地球化学勘察研究所长期关注农作物重金属的研究,是发文量最多的研究机构。关键词“重金属”和“农作物”都首次出现于2004年,且出现频次分别为111次和96次。对含有高频关键词和高被引论文的内容进行分析发现,在污染农田、再生水长期灌溉、高金属元素地质背景区、冶炼区周边等场景下农作物的重金属富集特征、污染风险、污染状况及健康风险评价等方面的研究,得到了论文作者们更多的关注和重视。近些年出现的热点词表明学者们的研究重心已由前期侧重农作物重金属的含量、吸收和污染程度的现状调查,向着农作物被重金属污染后所带来的健康风险评价、风险管控、污染防控实践转变,这将是农作物重金属后续研究中的重点内容。

Using CiteSpace software,this paper made a visual analysis of 304 scientific papers of heavy metals of crops in China collected by CNKI from 2004 to 2023.The results showed that the Institute of Geophysical and Geochemical Survey,Chinese Academy of Geological Sciences focused on heavy metals of crops with the largest number of publications.The keywords“heavy metals”and“crops”both appeared for the first time in 2004,and the frequency of occurrence was 111 and 96 times,respectively.Based on the analysis of the content of the papers containing high-frequency keywords and high citations,it was found that the research on the heavy metal enrichment characteristics,pollution risk,pollution status and health risk assessment of crops in the scenarios of polluted farmland,long-term irrigation of reclaimed water,geological background area of high metal elements,and surrounding smelting area has received more attention from the authors of the paper.The hot words that have emerged in recent years indicated that the research focus of scholars has shifted from the current investigation of the content,absorption and pollution degree of heavy metals of crops to the health risk assessment,risk management and control,and pollution prevention and control practices brought about by heavy metal pollution of crops,which will be the focus of follow-up research on heavy metals of crops.