| 陈 磊.四川重点流域耕地面积变化及其对粮食生产格局的影响[J].广东农业科学,2023,50(4):132-141 |
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四川重点流域耕地面积变化及其对粮食生产格局的影响 |
| Change of Cultivated Land Area and Its Influence on Grain Production Pattern in Key Watersheds of Sichuan Province |
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| DOI：10.16768/j.issn.1004-874X.2023.04.016 |
| 中文关键词: 耕地面积 粮食产量 时空特征 敏感度 四川重点流域 |
| 英文关键词: cultivated land area grain production spatiotemporal characteristics sensitivity key watersheds in Sichuan Province |
| 基金项目:教育部人文社科青年项目（22YJCZH016）；四川省社科规划青年项目（SC21C063）；南充市社科规划一般项目（NC23B298） |
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| 中文摘要: |
| 【目的】开展重点流域耕地面积变化特征及其对粮食生产格局的影响研究，旨在为促进地区耕地可持续利用、协调粮食安全与经济发展关系提供参考。【方法】以四川重点流域 82 个县域为研究单元，采用数理量化模型和 GIS 空间分析法研究其近 20 年耕地面积时空演变特征及其对粮食生产格局变化的影响。【结果】（1）2001 － 2020 年四川重点流域耕地面积整体增加 91.57 万 hm2，增幅为 37.39%，但不同经济发展时期呈现出“增加→基本不变→减少→基本不变”的变化趋势；（2）四川重点流域耕地面积变化空间集聚状态表现为高值聚类区和低值聚类区两类，且高值聚类区和低值聚类区数量变化在不同经济发展时期均呈现出倒“N”形波动增减的态势；（3）四川重点流域粮食生产空间转移类型（粮食生产转出区、生产转入区和生产稳定区）在数量上均呈现波动增减态势，总体上表现为粮食生产转出区和粮食生产转入区均有所增加，增幅分别为 13.42%、13.41%，变化态势基本持平，而粮食生产稳定区明显减少，降幅为 26.83%，粮食生产存在地区退化现象；（4）耕地面积变化是四川重点流域粮食生产空间转移的重要成因，粮食生产对耕地面积变化具有敏感性的县域呈现出集中且多点分布的特点。【结论】2001 － 2020 年四川重点流域耕地面积变化及其对粮食生产格局影响在不同经济发展时期具有明显的波动变化差异，就此提出严格落实耕地用途管制制度、加强地区主管部门协同管理、建立耕地保护长效利益补偿机制、构建耕地安全预警调控机制的对策建议。 |
| 英文摘要: |
| 【Objective】The study on the change characteristics of cultivated land area and its influence on grain production pattern in key watersheds aims to provide reference for promoting the sustainable use of cultivated land and coordinating the relationship between food security and economic development. 【Method】Taking 82 counties in key watersheds of Sichuan Province as the research unit, using mathematical quantization model and GIS spatial analysis method, this paper explores the spatiotemporal evolution characteristics of cultivated land area and its influence on the change of grain production pattern in the study area in recent 20 years. 【Result】(1) From 2001 to 2020, the cultivated land area in the key watersheds of Sichuan Province increased by 915,700 hm2, with an increase rate of 37.39%, but showed a changing trend of “increase→ basically unchanged→ decrease→ basically unchanged” in different economic development periods. (2) The change of cultivated land area showed a spatial agglomeration state of “high-value cluster area” and “low-value cluster area” in the key watersheds of Sichuan Province , and the changes in quantity of these areas
showed an inverted “N” type fluctuation trend in different economic development periods. (3) The spatial transfer types of grain production (grain production transfer out area, grain production transfer into area and grain production stability area) in the key watersheds of Sichuan Province showed a fluctuating trend of increase and decrease in quantity. In general, the area of grain production transferred out and transferred into increased by 13.42% and 13.41%, respectively, and the change trend was basically unchanged. However, the grain production stability area decreased significantly, down by 26.83%, and there was regional degradation in grain production. (4) The change of cultivated land area is an important cause of the spatial transfer of grain production in the key watersheds of Sichuan Province, and the counties that are sensitive to the change of cultivated land area show the characteristics of centralized and multi-point distribution. 【Conclusion】 The change of cultivated land area and its impact on grain production pattern in the key watersheds of Sichuan Province from 2001 to 2020 fluctuated significantly in different periods of economic development. Therefore, countermeasures and suggestions are put forward to strictly implement the cultivated land use control system, strengthen the cooperative management of regional competent departments, establish the long-term benefit compensation mechanism of cultivated land conservation, and construct the cultivated land security early warning and control mechanism. |
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