[Spatiotemporal Coupling Between the Ecological Efficiency of Cultivated Land Use and Agricultural High-quality...

The relationship between cultivated land use eco-efficiency （ECLU） and high-quality agricultural development （HQDA） constitutes a critical foundation for achieving sustainable agricultural production and promoting ecological civilization. This study conducted a comprehensive assessment of ECLU and HQDA across 71 counties in the Beijing-Tianjin region from 2005 to 2020， utilizing the super-efficiency EBM model and entropy weighting method. To further investigate their interactive relationship， it implemented the coupling coordination degree （CCD） model and conducted spatial autocorrelation analysis to elucidate their coordination dynamics and spatiotemporal patterns. The results show that： ① Both ECLU and HQDA displayed sustained growth trajectories during the study period， with similar spatial distribution characteristics. Geographically， high-value clusters were predominantly concentrated in the southeastern region， whereas low-value areas were mainly distributed throughout the western Taihang Mountain zone. ② The CCD between ECLU and HQDA showed consistent improvement， progressing from 0.52 to 0.64 over the 15-year period， indicating an evolution from marginal to primary coordination. However， the mean coordination level of 0.58 suggests that overall coordination remained at a moderate stage. ③ Spatial analysis revealed significant positive autocorrelation in CCD distribution， with correlation intensity following a non-linear temporal pattern-initially strengthening before gradually weakening. Local spatial autocorrelation results further identified distinct clustering patterns： High-high （H-H） agglomerations progressively expanded in the southeastern plains， while low-low （L-L） clusters maintained a patchy distribution in the western Taihang Mountain area. The research results can provide a scientific basis for formulating differentiated agricultural high-quality development policies and promoting the sustainable utilization of cultivated land resources in the Beijing-Tianjin surrounding region.