The course of GIS planning and application is a strong comprehensive course, that requires students not only to master a systematic theoretical knowledge system of geographic information systems, but also to have the ability to apply GIS software from cognition to functional applications, and then to comprehensive and innovative applications. The teaching of the GIS courses for non-GIS majors has the characteristics of theoretical knowledge integration, outstanding practical application, fast content updating, etc. , emphasizing novelty, practicality, skill, comprehensiveness, and real-world combat, and there is a certain contradiction between limited class hours and increased teaching content. Therefore, in order to achieve the goal of innovative and applied talents training, combined with didactical practice, the paper takes the teaching of GIS planning application course in urban and rural planning management as an example, and considers that it is necessary to start from the characteristics of the course itself, based on the concept of “one degree for both genders” evaluation and design, and apply targeted teaching methods and teaching tools to carry out the teaching, focusing on the higher order, innovation and challenge of the course teaching, analyzes the status and role of GIS planning application course for non-GIS majors, builds a teaching content system, explores teaching methods and experimental teaching, implements from point to surface and advances step by step in order to improve the teaching effect of GIS planning application course, mobilizes fully students􀆳 enthusiasm and potential for learning, improves continuously students􀆳 practical abilities and the quality of cultivating applied talents, and achieves simultaneously better professional sustainable development.

With China's economic and social development, under the influence of many factors, such as the low efficiency of grain cultivation and the formation of a pattern of specialization in agricultural production, the phenomenon of “de-farming” and “de-fooding” of arable land has begun to emerge in some areas. “Non-food” in China's food production space at the same time, but also on the arable land will produce different degrees of damage. Therefore, this paper analyzes the background and challenges of the “degrading” of arable land in China in the new era, and reveals in depth the regional and typological characteristics of the “degrading” of arable land, its causes, and its impact on food and ecological security. The paper finds that the background of “non-food” cropland stems from the diversification of agricultural production and the need to explore alternative land uses other than traditional food crops, and poses a challenge to China's food security by affecting the food supply. In the future, we should explore the formation of a long-term mechanism to strengthen the policy guidance of “non-food” and improve the efficiency of arable land for food cultivation in order to stimulate farmers' incentives to grow food. The article puts forward countermeasures to enhance the willingness of business entities to grow food and prevent the “degrazing” of arable land from the perspectives of policy guidance, multi-party participation, standard construction and compensation mechanism, with a view to providing certain reference significance for the protection of arable land in China in the future.

Cultivated land quality has an important impact on the production capacity of cultivated land and the level of regional development, and is also directly related to national food security. The area-weighted method was used to study the quantity of different cultivated land quality classes in A county, and the spatial autocorrelation analysis was used to study the spatial agglomeration characteristics and differences of cultivated land quality in A county. The results showed that: (1) The natural quality of cultivated land in A county was mainly concentrated in 10-12 grade, while the utilization and economic grades of cultivated land quality were mainly in 11-13 grade, and the utilization and economic qualities of cultivated land were lower than the natural quality. The overall quality of cultivated land in A county was at a medium level. (2) The Moran's I index of natural, utilized and economic quality of cultivated land in A County is greater than 0. 4, showing a strong positive spatial autocorrelation in spatial distribution; In the LISA analysis, the spatial aggregation features of natural, utilized and economic quality of cultivated land turned out to be positive correlated HH type and LL type, and the insignificant NN type distribution was more obvious. (3) Based on the spatial pattern presented by the spatial autocorrelation results, corresponding measures were proposed to provide more scientific references for decision-making and technical support for the implementation of cultivated land fine management in A county.

Since the mid-20th century, the global population has increased dramatically, and human activities have encroached on a large number of natural spaces, resulting in drastic land use/cover changes. A series of ecological security problems took place as a result, such as climate change, environmental pollution, and resource shortage, posing severe challenges to global sustainable development. As the largest and the most populous developing country in the world, China’s land use/cover change is more prominent compared to that of other countries. Therefore, the comprehensive analysis of land use/cover change in China is of great significance in dealing with global change, repairing ecological damage, and alleviating the contradiction between man and land. Based on the literature of land use/cover change in China from 2012 to 2022 in the Web of Science database, this paper analyzes the research status, characteristics, regional differences, and evolution law of land use/cover change in China by using Bibliometrix and Biblioshiny software packages. The results show that: (1) The annual number of papers published in the field of land use/cover change in China is steadily increasing. However, the average annual citation amount fluctuates but shows a general downward trend; (2) From 2012 to 2022, a total of 73, 157 authors published articles in the field of land use/cover change in China, among whom Zhang Yili, Liu Yansui, and Li Xiubin ranked the top three; (3) 153 countries or regions in the world have literature output in the field of land use/cover change in China, and the top three output countries are China, the United States and Germany. Among research, papers from China and the United States has played an important role in international cooperation in the field of land use/cover change in China; (4) The key words of land use/cover change research in China can be divided into three categories: the first category focuses on the research of driving factors/factors of land use/ cover change in China; The second category focuses on the models and technical methods of land use/cover change research in China; The third category emphasizes the role of policies and government management; (5) During the ten years from 2012 to 2022, the theme of land use/cover change in China changed little, mainly focusing on climate change and management.