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<p>Understanding the supply-demand relationships (SDRs) of multiple cultivated land functions (CLFs) is crucial for achieving the sustainable utilization of cultivated land. This study aimed to construct a research framework that integrates quantitative evaluation, spatiotemporal evolution, regional differences, and type zoning for analyzing the multiscale SDRs of multiple CLFs. Taking the Yangtze River Delta region as an example, we quantified the supply and demand of three CLFs—agricultural production, ecological service, and landscape culture—along with their changes at grid, county, and prefecture-level city scales between 2000 and 2020. We then analyzed the spatiotemporal characteristics and differences in SDRs along urban-rural gradients and across cities of varying sizes. The results revealed both similarities and differences in the changes and SDRs of multiple CLFs at different spatial scales. The demand for all three CLFs consistently exceeded supply across multiple scales in economically developed areas. Supply deficit regions for all three CLFs were primarily concentrated 10–20&#xa0;km from city centers. Megacities and supercities exhibited more significant and intensified supply deficits for these CLFs. Finally, we identified eight distinct SDR zones of multiple CLFs exhibiting different characteristics at different spatial scales that aimed to support decision-makers in promoting the sustainable utilization and management of cultivated land.</p>

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Integrating Multiscale Spatiotemporal Analysis for Supply-demand Relationships of Multiple Cultivated Land Functions in the Yangtze River Delta Region

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Yeting Fan,
  • Zhongqi Liao,
  • Xinyuan Liang,
  • Xiaolin Zhang,
  • Le Gan,
  • Ying Li,
  • Junxiao Wang

摘要

Understanding the supply-demand relationships (SDRs) of multiple cultivated land functions (CLFs) is crucial for achieving the sustainable utilization of cultivated land. This study aimed to construct a research framework that integrates quantitative evaluation, spatiotemporal evolution, regional differences, and type zoning for analyzing the multiscale SDRs of multiple CLFs. Taking the Yangtze River Delta region as an example, we quantified the supply and demand of three CLFs—agricultural production, ecological service, and landscape culture—along with their changes at grid, county, and prefecture-level city scales between 2000 and 2020. We then analyzed the spatiotemporal characteristics and differences in SDRs along urban-rural gradients and across cities of varying sizes. The results revealed both similarities and differences in the changes and SDRs of multiple CLFs at different spatial scales. The demand for all three CLFs consistently exceeded supply across multiple scales in economically developed areas. Supply deficit regions for all three CLFs were primarily concentrated 10–20 km from city centers. Megacities and supercities exhibited more significant and intensified supply deficits for these CLFs. Finally, we identified eight distinct SDR zones of multiple CLFs exhibiting different characteristics at different spatial scales that aimed to support decision-makers in promoting the sustainable utilization and management of cultivated land.