当前位置:首页>南京>南京农业大学姜朋辉教授团队最新发文!中国最发达地区粮食安全评估:多场景土地管理视角

南京农业大学姜朋辉教授团队最新发文!中国最发达地区粮食安全评估:多场景土地管理视角

  • 2026-02-07 14:40:11
南京农业大学姜朋辉教授团队最新发文!中国最发达地区粮食安全评估:多场景土地管理视角

文章基本信息

  • 期刊:Land Degradation & Development(中科院二区)

  • 英文题目:Food Security Assessment in Chinese Most Developed AreaFrom the Perspective of Multi-Scenario Land Management

  • 中文题目:中国最发达地区粮食安全评估:多场景土地管理视角

  • 发表时间:2026年

  • 文章链接:https://doi.org/10.1002/ldr.70468

摘要

耕地是粮食生产的基础,而土地资源管理政策则是保障农田功能性、质量和数量安全的制度保障。随着经济社会发展推动耕地非农转用的需求日益增长,土地资源管理政策的变迁正逐步影响着区域粮食安全的基础。在中国重要粮食产区,土地资源管理实践引发的土地利用变化正威胁着区域粮食安全。本研究聚焦粮食供给自给率,运用CLUMondo模型对太湖流域未来土地利用进行模拟。通过全球农业生态区模型与作物专属投入分配法,估算了该流域未来粮食供需动态,揭示了30年间不同土地资源管理政策下的粮食安全状况。在自然发展情景下,耕地面积将显著缩减,导致潜在粮食总产量逐步下降。严格保护耕地方案通过保护耕地、限制建设用地扩张、开发非农用地储备,将提升总生产潜力和平均潜在产量。协调发展方案在保持耕地规模稳定、确保粮食缺口水平基本一致的前提下,实现了经济增长与生态保护的平衡。然而受人口增长等因素影响,流域总粮食需求将持续攀升,供需缺口将长期存在。综合考量粮食安全与生态可持续性,协调发展路径是太湖流域调控粮食供需动态的最优方案。未来策略应通过保持并提升农田质量、优化农业生产结构,实现生态保护、粮食安全与经济社会发展的协调统一。

研究框架

本研究从太湖流域未来粮食安全水平的评估入手,系统测算粮食需求预测值,模拟多场景土地资源管理政策驱动的土地利用转变,量化30年周期内的区域粮食供给潜力,最终预测该流域至2050年的粮食安全发展轨迹, 从而为关键流域构建稳健粮食安全体系、推动可持续农业发展提供理论基础与政策启示。方法论框架如图2所示。

未来展望

本研究仅从土地利用角度预测未来粮食供给,未纳入可能影响粮食安全结果的气候变化影响、技术进步或贸易动态。对太湖流域气候变化影响粮食安全的综合探讨。

气候变化通过三个维度影响太湖流域的粮食安全——粮食供给、生产实践和市场可及性。多重气候因素加剧了流域粮食系统的不确定性与脆弱性。粮食供给高度依赖农业气候资源,而气候变化显著改变了温度、降水模式及极端天气事件的发生频率。极端气候事件可能导致土地退化。气温上升会缩短作物生长周期,而在关键生长阶段出现的热浪则可能抑制籽粒灌浆,从而降低产量。降雨时空分布的不均匀性加剧了干旱与洪涝交替发生的现象,改变了水资源可利用性并增加了病虫害风险。气候快速变化同样会降低谷物品质,例如稻米直链淀粉含量的变化直接影响市场需求。气候变化迫使农业实践进行调整,如采用抗逆作物品种或改变种植结构,但此类转型可能导致总产量和生产稳定性失衡。虫害压力加剧与耕作条件恶化导致农药化肥用量攀升,威胁环境可持续性。气候诱发的产量波动引发价格剧烈波动,极端天气事件造成的短期供应短缺尤其冲击低收入群体。与此同时,区域间粮食产量的日益差异化加剧了市场失衡,导致局部价格暴涨与短缺。因此,气候变化影响流域粮食安全的具体机制亟待深入研究。

在不断演变的贸易格局下,对粮食供需结构变化的深入分析。受区域经济发展与资源限制的矛盾制约,太湖流域呈现出供需失衡的特征:粮食产量持续缩减,需求结构日益多元化,对外粮源依赖程度不断加深。快速工业化与城市化导致耕地面积缩减,优质农田被转作工业及城市用地,削弱了本地供给能力。加之作物结构向高价值经济作物倾斜,稻麦等主粮作物占比下降,劳动力向非农领域转移更进一步制约了生产潜力。与此同时,收入增长推动消费模式升级——主粮需求增速放缓,而畜牧业扩张和加工食品消费加速了饲料及工业用粮需求。本地产量下降与需求上升加剧了对外粮源的依赖。在中国粮食贸易网络中,该流域已从粮食出口区转变为净进口区,依靠贸易弥补供给缺口。然而这种依赖性暴露了供应链脆弱性与价格波动性等风险,可能加剧粮食安全隐患。未来研究需深入剖析贸易动态演变中供需结构的变革。

中国耕地保护政策驱动的太湖流域土地利用调控研究。中国耕地保护政策深刻塑造了经济发达且农业重要的太湖流域土地利用格局。永久性基本农田保护制度有效遏制了优质农田因工业及基础设施扩张而流失。然而,征地补偿平衡政策虽缓解了城市扩张导致的农田流失,却未能完全抵消因替代耕地质量参差不齐(如土壤肥力低下、灌溉条件不足)造成的生产力下降。土地用途分区政策严格划分农用与非农用地,优先保障水资源丰富的湖区生态保护。部分低效农田被改造成生态保护区或湿地,虽提升了生态系统服务功能,却削弱了粮食生产潜力。政策同时推动集约化与优化土地利用,促进机械化及现代农业技术应用。然而,向高价值作物转型与劳动力外流趋势持续动摇粮食生产基础。尽管这些政策有效遏制了土地流失并优化了土地利用结构,但补偿地质量参差不齐、农地减少等挑战凸显了政策设计与实际需求之间的脱节。未来应着力提升土地质量补偿水平,完善生态补偿机制,优化土地利用分区规划,以协调保障粮食安全与促进可持续发展。

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原文请见:https://doi.org/10.1002/ldr.70468

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  1. CONNECT:[ UseTime:0.000990s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001415s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001533s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000702s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001590s ]
  6. SELECT * FROM `set` [ RunTime:0.002174s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001526s ]
  8. SELECT * FROM `article` WHERE `id` = 473141 LIMIT 1 [ RunTime:0.001173s ]
  9. UPDATE `article` SET `lasttime` = 1770577752 WHERE `id` = 473141 [ RunTime:0.017432s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.003046s ]
  11. SELECT * FROM `article` WHERE `id` < 473141 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002925s ]
  12. SELECT * FROM `article` WHERE `id` > 473141 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001145s ]
  13. SELECT * FROM `article` WHERE `id` < 473141 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007133s ]
  14. SELECT * FROM `article` WHERE `id` < 473141 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003189s ]
  15. SELECT * FROM `article` WHERE `id` < 473141 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003390s ]
0.219047s