基于文献计量的水稻秸秆利用及固碳减排潜力分析

    Analysis of the comprehensive utilization of rice straw and its potential in carbon sequestration and emission reduction based on bibliometrics

    • 摘要: 秸秆资源综合利用是全球性难题,中国作为水稻生产大国,年产水稻秸秆约2亿t,但传统处理方式不仅导致资源浪费,更对水土气环境构成威胁。为了系统掌握全球水稻秸秆利用的研究进展,优化中国秸秆综合利用路径提供依据,基于Web of Science核心数据库(1995—2024年),利用Citespace对8,952篇相关文献进行可视化分析。系统梳理了该领域的发文量趋势、发文国家、机构合作网络、研究热点及演变历程。结果表明,自2008年以来,该领域年发文量呈指数增长,表明秸秆综合利用已成为国际学术热点。中国在该领域的研究显示出强大的科研攻关力量和较强的影响力,主要研究机构如中国科学院和中国农业科学院等国际合作紧密。近30a来,研究重点聚焦于秸秆还田对稻田土壤性质和作物产量的影响、重金属吸附机理、厌氧发酵预处理技术、温室气体排放与全球增温潜势评估等方面。结合中国国情,进一步深入分析了以“农用为主、五化并举”(肥料化、饲料化、燃料化、基料化、原料化) 为核心的水稻秸秆利用格局现状及关键共性技术,并评估了不同利用方式的固碳减排潜力。未来研究应侧重于拓展多元化固碳减排技术路径、创新高值化与规模化利用模式,以及构建智能化的监管、溯源与决策支持系统,推动水稻秸秆利用向高值化、智能化及跨学科融合方向发展。研究为促进秸秆资源循环利用、推动农业绿色低碳转型,以及助力中国实现碳达峰碳中和目标,提供了科学依据与决策参考。

       

      Abstract: In order to systematically and objectively assess the research status and development trends on the utilization of rice straw, and provide a reference for the efficient utilization of rice straw in China, the literature research was conducted in this field from 1995 to 2024 based on the core database of Web of Science using the Citespace. The number of annual published literatures, the main published countries, research institutions, keyword co-occurrence network, and keyword clustering were visually analysed. On this basis, the current status, key common technologies, and the carbon sequestration and emission reduction potential of rice straw utilization in China were systematically summarized, and future research trends and priorities were also proposed. The annual publications had showed a continuous upward trend in the field of global rice straw utilization, and the number of publications showed an exponential growth trend after 2008, indicating that this research field had received extensive attention world widely. As a major rice producer in the world, China had a strong scientific research force and strong influence in this research field, with the highest citation frequency and H-index index of publications. Domestic research institutions such as the Chinese Academy of Sciences and the Chinese Academy of Agricultural Sciences had close cooperation relationships with domestic and foreign institutions. In the past 30 years, the impact of rice straw utilization on rice growth and yield, soil carbon and nitrogen nutrients, and greenhouse gas emissions were the research hotspots in this field. The accumulation, biological properties, and toxicity of heavy metals (such as arsenic, cadmium, lead, etc.) in soil by rice straw returning or rice straw biochar returning was also a hot topic. In addition, the anaerobic fermentation and biogas production during the pretreatment process of rice straw had gradually increased attentions. Recently, the greenhouse gas emissions and global warming potential after rice straw utilization were the major research focus. Based on China's national conditions, this study conducted an in-depth analysis of the current status and key common technologies of the comprehensive utilization pattern of rice straw characterized by “agricultural application as the priority and simultaneous development of five utilization pathways” (fertilization, feedification, fuelification, substrate application, and raw material utilization). According to statistical analysis in 2016, the main utilization methods of rice straw were fertilization and fuel utilization, accounting for 69.0% and 14.6% respectively, following by the feed utilization, base material utilization, and fuel utilization, which accounted for 8.6%, 3.7%, and 4.0% respectively. Compared with direct incineration, the potential contribution of five material utilization to greenhouse gas emission reduction and carbon sequestration were greater. It also evaluated the carbon sequestration and emission reduction potential of different utilization methods. The research proposed that future efforts should focus on expanding diversified carbon sequestration and emission reduction technologies, innovating high-value and large-scale utilization pathways, and establishing intelligent monitoring, traceability, and decision-making systems. These initiatives would advance research on the high-value and intelligent utilization of rice straw through interdisciplinary approaches. This study provided critical decision-making references for promoting the recycling of straw resources, facilitating green and low-carbon transformation in agriculture, and supporting the achievement of national carbon peak and carbon neutrality goals.

       

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