Shi Youchao,Jin Xiaobin,Luo Xiuli,et al.Assessment and Case Study of Functional Loss of Cultivated Land in Rapidly Urbanizing Areas[J].Research of Soil and Water Conservation,2024,31(03):443-453.[doi:10.13869/j.cnki.rswc.2024.03.041]
快速城市化地区耕地功能性流失测度评价与实证分析
- Title:
- Assessment and Case Study of Functional Loss of Cultivated Land in Rapidly Urbanizing Areas
- 文章编号:
- 1005-3409(2024)03-0443-11
- 分类号:
- F323.211
- 文献标志码:
- A
- 摘要:
- [目的]揭示快速城市化发展下耕地功能性流失现象的阶段性特征,探讨流失类型和流失等级的时空格局与管控策略,为优化区域耕地保护、保障粮食安全提供思路借鉴。[方法]基于快速城市化地区耕地功能性流失的类型特征解析,从“用途—产能—储量”三维视角构建其综合测度体系,监测耕地功能的流失程度并预测流失风险,进一步针对各级流失区域提出管控策略,以江苏省江阴市为研究区开展了实证研究。[结果](1)统筹考虑耕地功能流失的阶段性特征,以此划分耕地功能性流失的主要类型,探索定量表征快速城市化进程下耕地功能性流失程度和风险的方法,对缓解耕地保护与经济发展冲突具有重要理论支撑。(2)江阴市用途流失维中种植非粮食作物面积占比最大,共涉及267个村; 产能流失维涉及的村域较少,仅59个村; 储量流失中,中低风险类型区涉及的村域较多且数量相当,分别为104个村和115个村。(3)基于综合评价体系,江阴市村域中二级流失占比最大(71.17%),在未来发展中需对不同流失程度实施完善农业建设、优化农业空间布局、加强流失风险监测等差异化治理策略。[结论]耕地功能性流失现象在发生时间、受干扰因素和表现形式等方面存在阶段性特征,其时空格局在分维和综合维度上各具差异,因地施策可为促进区域耕地保护与利用,完善耕地功能风险监测与预警,进而优化国土空间合理布局等提供理论支撑。
- Abstract:
- [Objective] The aim of this study is to investigate the spatiotemporal dynamics, mitigation strategies and the evolving characteristics of the cultivated land function loss under rapid urbanization, which is pivotal for enhancing regional farmland conservation and guaranteeing food security. [Methods] This study developed a comprehensive evaluation framework from the tri-dimensional perspective of ‘use-capacity-reserve'. This was built upon a functional loss typology analysis for cultivated lands in swiftly urbanizing areas. This framework gauged the extent of functional loss and anticipates associated risks. Specific control measures tailored to each loss level were also suggested. Jiangyin, a county-level city in Jiangsu Province, was used as a case study. [Results](1)Recognizing the evolving nature of cultivated land's functional loss, we classified its primary types and derived quantitative tools for measuring its extent and associated risks during rapid urbanization, offering vital theoretical underpinnings to harmonize farmland conservation with economic progress.(2)In Jiangyin City, a significant portion of non-food crops is cultivated on lands that have lost their original function, spanning 267 villages. Production capacity loss is limited to 59 villages. With respect to reserve loss, medium and low-risk categories impact 104 and 115 villages, respectively.(3)According to our evaluation framework, Jiangyin experienced a predominant secondary level function loss, affecting 71.17% of its villages. Forward-looking strategies, including agricultural infrastructure enhancement, agricultural spatial layout optimization, and risk monitoring augmentation, must be tailored to varying loss degrees. [Conclusion] The phenomenon of functional loss in arable land exhibits stage-specific characteristics in terms of occurrence time, influencing factors, and manifestations. Its spatiotemporal patterns vary in both separate and integrated dimensions. The tailored strategies can provide decision-making support for promoting regional cultivated land protection and utilization, improving monitoring and early warning systems for functional risks, and optimizing space layout of national territory.
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备注/Memo
收稿日期:2023-08-15 修回日期:2023-09-16
资助项目:国家自然科学基金项目(41971234; 41971235)
第一作者:施釉超(2000—),女,山西阳泉人,硕士研究生,主要研究方向为耕地保护与粮食安全。E-mail:youchao_shi@163.com
通信作者:金晓斌(1974—),男,甘肃兰州人,教授,博士,博士生导师,主要研究方向为土地利用与国土整治。E-mail:jinxb@nju.edu.cn