[1]刘晴晴,陈万旭*,杨立言,等.中国耕地垂直扩张特征及其形成机理[J].山地学报,2025,(3):378-392.[doi:10.16089/j.cnki.1008-2786.000899]
　LIU Qingqing,CHEN Wanxu*,YANG Liyan,et al.Vertical Expansion Patterns of Cultivated Land in China and Underlying Drivers[J].Mountain Research,2025,(3):378-392.[doi:10.16089/j.cnki.1008-2786.000899]
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中国耕地垂直扩张特征及其形成机理()

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2025年第3期
页码:
378-392
栏目:
山区发展
出版日期:
2025-06-20

文章信息/Info

Title:
Vertical Expansion Patterns of Cultivated Land in China and Underlying Drivers
文章编号:
1008-2786-(2025)3-378-15
作者:
刘晴晴; 陈万旭*; 杨立言; 曾 杰
(中国地质大学(武汉)地理与信息工程学院,武汉 430078)
Author(s):
LIU Qingqing;  CHEN Wanxu*;  YANG Liyan;  ZENG Jie
(School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China)
关键词:
耕地;  垂直扩张;  成因分析;  机理揭示
Keywords:
cultivated land;  vertical expansion;  causal analysis;  mechanism
分类号:
F329.9
DOI:
10.16089/j.cnki.1008-2786.000899
文献标志码:
A
摘要:
耕地垂直扩张是中国农业可持续发展面临的新问题和挑战,严重威胁粮食安全和耕地可持续利用。科学揭示中国耕地垂直扩张规律及成因,对保障国家粮食安全,科学指导耕地下山、林耕置换政策,具有重要的理论和现实意义。已有研究缺乏对中国耕地垂直扩张特征及其形成机理的深入揭示,难以支撑更具针对性的耕地保护政策的制定。本研究基于1980—2020年中国30 m×30 m分辨率土地利用遥感监测数据,测度中国耕地利用变化幅度及其垂直扩张特征,揭示中国耕地垂直扩张形成原因及机理。结果表明:(1)1980—2020年中国耕地面积整体有所增加,年均增幅为0.02%,北方干旱半干旱地区为中国耕地持续补充区,而华南区、黄淮海平原区、四川盆地及周边地区和长江中下游地区则是主要的耕地流失区。(2)中国耕地垂直扩张了17.38 m,其中耕地海拔增幅最大的为青藏高原区(66.02 m),降幅最大的是北方干旱半干旱地区(76.05 m)。中国东部各农业区存在突出的耕地垂直扩张现象,而西部各农业区耕地平均海拔则呈下降趋势。(3)1980—2020年中国转入耕地面积(26.21×104 km2)和平均海拔(677.95 m)明显高于转出耕地面积(25.06×104 km2)和平均海拔(585.17 m),其中草地和林地向耕地转型是中国耕地垂直扩张的主要原因。(4)资源禀赋、立地条件和政策制度是导致耕地垂直扩张的关键; 多种要素通过远近程耦合作用促进了耕地的垂直扩张。研究成果可为耕地保护宏观调控策略和差异化管控措施的制定提供科学参考。
Abstract:
Vertical expansion of cultivated land challenges the agricultural sustainability in China, severely compromising both food security and sustainable land use. Scientifically delineating the patterns and drivers of this phenomenon is critical for safeguarding national food security and guiding evidence-based policies such as farmland downslope transfer and forest-farmland conversion. Former studies lacked in-depth exploration of the characteristics and mechanisms underlying cultivated land vertical expansion, limiting targeted conservation policymaking.
In this study, it utilized 30 m × 30 m resolution land-use remote sensing data(1980-2020), and quantified spatiotemporal changes and vertical expansion patterns of cultivated land across China.
(1)It found that during 1980-2020 there was a general increase in cultivated land area at an annual rate of 0.02%. Northern arid/semi-arid regions appeared as primary gain zones, while significant losses occurred in South China, Huang-Huai-Hai Plain, Sichuan Basin with its periphery, and the Lower-Middle Reaches of the Yangtze River.
(2)Nationwide vertical expansion averaged 17.38 m. The Qinghai-Tibet Plateau recorded the maximum ascent(66.02 m), whereas northern arid/semi-arid regions exhibited the steepest descent(76.05 m). There was a prominent vertical expansion of cultivated land in the agricultural regions of eastern China, while the average elevation of cultivated land in the agricultural regions of western China showed a decreasing trend.
(3)Incoming cultivated land(26.21×104 km2)averaged 677.95 m elevation-significantly higher than outgoing land(25.06×104 km2, 585.17 m). Conversion from grasslands and forests constituted the dominant expansion pathway.
(4)Resource endowment, site conditions, and polices/regulations collectively drove the expansion through remote-proximal coupling effects.
This research provides a scientific foundation for macro-control strategies and spatially differentiated governance of cultivated land conservation.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2025- 03-22; 改回日期(Accepted date):2025- 05-28
基金项目(Foundation item): 国家自然科学基金(42371258)。[National Natural Science Foundation of China(42371258)]
作者简介(Biography): 刘晴晴(2001-),女,硕士研究生,主要研究方向:城乡转型治理。[LIU Qingqing(2001-), female, M.Sc. candidate, research on governance of urban-rural transformation] E-mail: lqq@cug.edu.cn
*通讯作者(Corresponding author): 陈万旭(1989-),男,博士,副教授,主要研究方向:国土空间优化治理。[CHEN Wanxu(1989- ), male, Ph.D., associate professor, research on territorial space optimization and governance] E-mail: cugcwx@cug.edu.cn
更新日期/Last Update: 2025-05-30