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Spatiotemporal differentiation and formation mechanism of arable land function transformation in China

XIONG Qiang, ZHENG Liang, JIANG Jin-hui

HUBEI AGRICULTURAL SCIENCES 2024, 63 (2): 94-100，110. DOI: 10.14088/j.cnki.issn0439-8114.2024.02.017

Abstract （221）

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In order to accurately describe the path and formation mechanism of farmland function transformation in China, the theoretical framework and evaluation index system of farmland function transformation were established, and the method of determining index weight based on game theory was proposed. Based on the comprehensive index model, the farmland functional transformation index of China’s provinces from 2000 to 2020 was measured, and the mechanism of farmland transformation in China was analyzed. The results showed that from 2000 to 2020, the social function of cultivated land increased and then decreased, the economic function decreased and then increased, and the ecological function remained stable. Among the sub-functions, the function of food security and ecological function were in the main position, the economic contribution function of cultivated land was stronger in underdeveloped areas, and the social function of cultivated land was stronger in northeast areas. From 2000 to 2020, the change of cultivated land function in China took a turning trend and began to evolve along the development direction of urban and rural residents’ demand. On the whole, the driving force of the urbanization level, the quality of economic development, the proportion of non-agricultural industry and the difference in the central, eastern and western areas on cultivated land function transformation had reduced, the driving force of regional economic aggregate on cultivated land function had increased, and the influence of population density on cultivated land function had remained stable.

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Analysis on the characteristics and influencing factors of urban land use expansion in Nanjing metropolitan area

XIONG Yuan-yuan, LI Yi

HUBEI AGRICULTURAL SCIENCES 2024, 63 (2): 101-110. DOI: 10.14088/j.cnki.issn0439-8114.2024.02.018

Abstract （222）

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Taking Nanjing metropolitan area as the research object, based on the land use data extracted from the 5 remote sensing images from 2000 to 2020, the temporal and spatial characteristics and influencing factors of urban land use expansion in the urban agglomeration of Nanjing metropolitan area were quantitatively analyzed from the expansion intensity, difference index of expansion intensity, cluster analysis, landscape pattern index and multiple regression model. The results showed that based on the analysis of the expansion intensity index, the urban land area of Nanjing metropolitan area continued to increase from 2000 to 2020, and the expansion intensity showed a trend of “rising-falling-rising”, and the expansion intensity of urban land was the highest from 2015 to 2020. Based on the analysis of the difference index of urban land expansion intensity, the high-speed expansion area of Nanjing metropolitan area was concentrated in the border areas of the metropolitan area, mainly distributed in the northeast and southwest directions, and the urban land expansion layout was developing towards a balanced development. Based on the analysis of the cluster analysis model, it was found that the urban land use expansion in Nanjing metropolitan area was randomly distributed from 2000 to 2010, the urban land use expansion was concentrated at high values from 2010 to 2015, and the land use expansion was randomly distributed from 2015 to 2020. Based on the analysis of the landscape pattern index, it was found that the degree of urban land expansion agglomeration in Nanjing metropolitan area gradually increased, the distribution of patches became more and more concentrated, the shape of patches tended to be complicated in the continuous integration and expansion, the traffic connection degree in urban land patches continued to increase, and the expansion of urban land in Nanjing metropolitan area developed towards synergy. Based on the analysis of the multiple regression model, population growth, urban economic development and transportation construction were the main factors promoting the expansion of urban land.

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