Advances in Resources and Environmental Science

Cultivated land is the main type of rural land use and an important resource for human survival. Studying the spatio-temporal change characteristics of cultivated land resources has far-reaching significance for strengthening the protection of cultivated land and optimizing the spatial distribution. Based on the land use data of 1990, 2000, 2010 and 2020 in Hefei, this study used land use transfer matrix, nuclear density analysis and landscape index to analyze the spatio-temporal change characteristics of cultivated land resources in Hefei, and explored the driving factors of cultivated land change through the plus model. The results showed that: (1) From 1990 to 2020, the cultivated land area had a significant change and showed a decreasing trend on the whole, with a total decrease of 1020.36km2, mainly converted to impervious water surface and forest land. (2) There are significant differences in the spatial distribution of cultivated land in different regions. The area of very low nuclear density is expanding, and the area of high density is gradually decreasing, which leads to the continuous weakening of cultivated land aggregation. (3) The shape of cultivated land patches became more and more complex and irregular, and there was a trend of dispersion among patches, and the degree of fragmentation gradually increased. (4) Under the influence of social and economic factors such as distance from primary and secondary roads, GDP, population, and natural environmental factors such as elevation, annual precipitation, and annual relative humidity, the fragmentation of cultivated land area is intensified.

Cultivated land resources; Space-time change; Landscape index; Driving factor