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。
[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 pr
作者
施釉超
金晓斌
罗秀丽
梁坤宇
周寅康
Shi Youchao;Jin Xiaobin;Luo Xiuli;Liang Kunyu;Zhou Yinkang(School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210023,China;Key Laboratory of Coastal Zone Exploitation and Protection,Ministry of Natural Resources,Nanjing 210023,China)
出处
《水土保持研究》
CSCD
北大核心
2024年第3期443-453,共11页
Research of Soil and Water Conservation
基金
国家自然科学基金项目(41971234,41971235)。
关键词
耕地
功能性流失
多维测度
城市化
江阴市
cultivated land
functional loss
multidimensional measure
urbanization
Jiangyin City
