Abstract:

Clarifying the differences in the characteristics of Chinese and English articles on farmland intercropping can better provide theoretical support and reference for carrying out researches in the field, condensing results and publishing high-level articles under the new situation. In this study, CiteSpace software was used to conduct a bibliometric analysis of keyword co-occurrence and keyword burst to analyze the characteristics of Chinese and English literatures in the field of nitrogen utilization in intercropping system in 2000-2022, using the literatures related to nitrogen utilization in intercropping system in Web of Science (WOS) core database and China National Knowledge Infrastructure (CNKI) as the research objects. It was found that the Chinese and English publications of nitrogen research in intercropping system have been quite different. In the first decade, Chinese publications were mainly focused on the economic and environmental benefits of nitrogen regulation in intercropping system under different external conditions. However, in recent years, the number of English publications has far exceeded the number of Chinese publications, and many highly cited articles have been published in journals with great international influence. The journals with the largest number of articles in Chinese were mainly domestic well-known journals such as Journal of Plant Nutrition and Fertilizer, Chinese Journal of Applied Ecology, Chinese Journal of Eco-Agriculture, Acta Agronomica Sinica and Scientia Agricultura Sinica. The journals with the largest number of articles in English were mainly foreign mainstream journals such as Plant and Soil and Field Crops Research, and the impact factors were all above 3.5 points. The institutions with the most Chinese publications were mainly Yunnan Agricultural University and Sichuan Agricultural University. From the perspective of the number of English publications, China Agricultural University and the Chinese Academy of Sciences were the main contributors. Compared with the keywords published in Chinese and English journals, the research content has certain similarities, mainly focusing on yield, maize, wheat, soil, nitrogen and nitrogen utilization efficiency. However, in recent years, there have been some differences in research hotspots. The published English articles focused on microorganisms and nitrogen research at a large scale, while the published Chinese articles still focused on increasing production and efficiency, focusing on economic benefits while taking into account environmental benefits. On the basis of theoretical research, they paid more attention to the application of technology, which can be replicated and more operable. Although the number of articles published and the level of research in this field have increased rapidly in China, the number of Chinese articles has been relatively reduced, and there is a lack of influential English mainstream journals in China. In the future, we should pay more attention to the combination of theory and practice, establish professional Chinese journals or set up special sections, open up the boundary between Chinese and English articles, and serve the production practice. At the same time, diversified intercropping planting and its microbial and genetic research should be carried out, and the research and development and application of supporting agricultural machinery and equipment should be promoted to promote farmland biodiversity, ecological effects and agricultural sustainable development potential.

Key words: intercropping system, nitrogen, CNKI, Web of Science, CiteSpace