摘 要
随着中国城市化进程的加速，城市扩张对耕地资源的占用问题日益突出，已成为影响国家粮食安全和生态平衡的重要因素。本文首先梳理了近年来中国城市扩张与耕地减少的时空特征，发现城市扩张主要集中在东部沿海地区和经济发达省份，且呈现出向周边农村地区蔓延的趋势。其次，本文构建了一个多层次的耕地保护影响模型，揭示了城市扩张通过土地利用变化、农业生产效率下降和生态系统服务功能退化等多重路径对耕地保护产生负面影响。本文提出了以“空间优化、制度创新和生态补偿”为核心的综合对策体系，强调通过优化城市空间布局、完善土地管理制度和建立生态补偿机制来实现耕地保护与城市发展的协调。
关键词：城市扩张；耕地保护；土地利用变化；生态补偿机制；空间优化
THE INFLUENCE OF URBAN EXPANSION ON FARMLAND PROTECTION AND ITS COUNTERMEASURE ANALYSIS
ABSTRACT
With the acceleration of China's urbanization process, the occupation of cultivated land resources by urban expansion has become increasingly prominent, which has become an important factor affecting the national food security and ecological balance. This paper first combs the spatial and temporal characteristics of urban expansion and cultivated land reduction in China in recent years, and finds that the urban expansion is mainly concentrated in the eastern coastal areas and economically developed provinces, and shows a trend of spreading to the surrounding rural areas. Secondly, this paper constructs a multi-level influence model of cultivated land protection, which reveals that urban expansion has negative effects on cultivated land protection through multiple paths such as land use change, decline of agricultural production efficiency and degradation of ecosystem service function. This paper puts forward a comprehensive countermeasure system with "spatial optimization, system innovation and ecological compensation" as the core, and emphasizes the coordination between farmland protection and urban development by optimizing the urban spatial layout, perfecting the land management system and establishing the ecological compensation mechanism.
KEY WORDS：Urban expansion; Cultivated land protection; Land use change; Ecological compensation mechanism ;Space optimization
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 研究背景和意义 1
1.2 城市扩张对耕地保护影响的研究现状 1
第2章 相关理论概述 3
2.1 城市扩张对耕地面积变化的时空特征 3
2.2 不同区域城市扩张对耕地影响的差异性分析 3
2.3 城市扩张对耕地质量的影响评估 4
第3章 城市扩张对耕地保护的政策效应分析 5
3.1 现行耕地保护政策的实施效果评估 5
3.2 城市扩张背景下耕地保护政策的局限性分析 5
3.3 国内外城市扩张与耕地保护政策的比较研究 6
第4章 应对城市扩张的耕地保护对策建议 7
4.1 优化土地利用规划以减少耕地占用 7
4.2 强化土地管理政策以提升耕地保护效率 7
4.3 推动科技创新以提高耕地利用效率 8
4.4 加强公众参与和社会监督机制建设 8
第5章 结论 10
参考文献 11
致 谢 12
