Dedong Feng

在城乡中国迈向深度融合与高质量发展背景下，全面把握城乡要素流动研究动态具有重要理论与公共政策价值。遵循“方法—机理—效应”的逻辑主线，论文对国内城乡要素流动研究进展进行系统回顾，梳理了以代理变量推断、综合评价体系和空间交互模型为核心的要素流动测度体系及其理论基础，揭示了要素流动兼具由要素禀赋差异与收益最大化驱动的内在经济逻辑以及受制度环境、区位选择与微观主体行为等外部因素共同塑造的复杂机理，归纳了要素流动在经济、社会与生态等维度上产生的多重影响效应。进而提出，未来国内城乡要素流动研究应立足于中国特有的制度环境与转型情形，强化对要素流动的多类型与多尺度耦合精准测度、动态模拟与因果机制识别研究，探索要素流动的“特征—过程—效应—调控”一体化治理体系，以期助力中国式现代化建设与城乡融合发展。

Cropland abandonment (CA) is a critical environmental issue globally, with balancing food security and ecological protection vital for sustainable development. This study explores CA behavior differences and drivers between out-of-poverty farming households (OPFHs) and non-poverty farming households (NPFHs) in China′s mountainous areas, using stepwise regression on survey data from 321 households in Liping County, Guizhou. The results show that: (1) The differences in CA behaviors between the two types of farming households are mainly reflected at the farmer level and the plot level. Plot integrity is a common influencing factor of CA areas for both types of farming households. (2) The driving factors affecting the area of CA by OPFHs also include the average age of the labor force, the proportion of the resident population in the total household registration population, and plot type, while the drivers affecting the area of CA by NPFHs include per capita income, non-agricultural income, per capita cropland area, and commuting time. (3) The differences in CA behavior and its driving factors between OPFHs and NPFHs in mountainous areas are characterized by diversity and interaction. Based on the results of the study, we propose the management of farming households and cropland, which can contribute to rural revitalization in China and the world, to a certain extent.

【目的】耕地利用转型贯穿于中国城乡关系演变全过程，与城乡融合发展互促互馈。构建面向城乡融合的耕地利用系统转型概念体系与理论框架，对完善中国土地系统科学研究的话语体系具有重要意义。【方法】本文基于土地系统科学视角，运用文献研究法、归纳演绎法与逻辑推演法，阐释了耕地利用系统转型的概念内涵，建构了耕地利用系统在地化与去地化转型的学术话语，分析了中国城乡关系由乡土中国到城乡中国的阶段变迁以及相应阶段耕地利用系统的转型逻辑，提出了城乡融合发展下“再地化”与“混杂化”将共同构成中国耕地利用系统转型的下一个演化周期。【结果】研究发现：耕地利用系统转型可定义为耕地利用三维（自然、经济与管理）子系统的要素、结构与形态因受经济社会与自然地理等外部参数变动综合影响而在时序上表现出趋势性变化的过程；中国城乡社会的显著乡土黏性根植于小农经济历史下对耕地利用系统的高度依赖；从乡土中国到城乡中国，既是中国城乡关系逐步迈向城乡融合的过程，也是耕地利用系统由在地化向去地化转型的过程。【结论】基于土地系统科学视角梳理城乡关系与耕地利用系统转型的变迁脉络和基本逻辑，能为构建面向城乡融合的耕地利用调控机制提供理论参考。

The spatial restructuring of rural settlements is conducive to the realization of rural transition and development. This study constructed a “point-line-surface” framework for the spatial reconstruction of the homestead in a typical mountain village and used the weighted Voronoi diagram and buffer analysis method to analyze. The results are as follows. (1) The development capacity of rural homesteads in Longfeng Village was divided into three levels: high, medium, and low. Among them, the high-level homesteads clustered in the north and south of the village in the form of a “T” and a long strip, respectively; the medium-level homesteads are mostly aggregated in the middle of the village; the low-level homesteads are mainly distributed along the Fenghuang Mountain. (2) The layout of homesteads in Longfeng Village was axis-oriented, which is manifested by the number and scale being in a gradient-decreasing pattern with the main road axis as the centerline. (3) According to the principle of “maximum” development capacity of the homestead, nine reconstruction units are divided. By calculating the location entropy, it is found that the dominant functions of each reconstruction unit mainly include supporting life services, operational production, ecological agricultural production, and traditional agricultural production, and there are obvious differences in the development patterns of homesteads in different functional units. (4) Based on the “point-line-surface” characteristics of the homestead, four reconstruction modes, namely, modern community type, field and garden integration type, road-pointing type, and traditional residential type, are summarized, and the reconstruction strategies are proposed accordingly. The “point-line-surface” framework of rural settlements is of practical significance and theoretical value, which can provide a decision-making reference for the optimization and reorganization of residential land space in villages of the same type in mountain areas. Moreover, the integrated and innovative framework proposed in the paper has also international significance, thanks to the possibility of replicating the research strategy and methodological approach in other contexts.

In China, the rural human settlement system (RHSS) reflects the relationship between rural people and land but is affected by land use and land cover change (LUCC). Maintaining a harmonious development between RHSS resilience (RHSSR) and LUCC is an important rural development issue. However, the spatial association between LUCC and RHSSR remains unclear, constraining effective land use and rural policymaking. The association between RHSSR and LUCC was assessed from a spatial perspective. Using county-level spatial panel data for Hunan Province, China (2000–2020), an evaluation indicator system was established to measure RHSS and analyze the spatiotemporal evolution of RHSSR using a geospatial analysis and geodetector model. The average RHSSR level increased from 0.158 to 1.406. The RHSSR generally presented a three-level stepped spatial distribution feature of high in the east and low in the west, with a belt-like distribution. Additionally, the RHSSR was consistent with land use intensity (LUI), but there was significant spatial heterogeneity in the spatial relationship between LUI and RHSSR. The evolution of RHSSR occurred through industrial development, medical service improvement, increased income, and environmental protection. This has important implications for future rural development strategies, the sustainable development of rural land, and the integration of RHSS into regional planning.