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湖南省耕地利用可持续集约化与规模化的空间错位特征及影响机制

Spatial mismatch of sustainable intensification and scaling in cultivated land use: patterns and driving forces in Hunan Province

  • 摘要: 耕地利用可持续集约化与规模化的空间错位,是导致耕地资源配置低效、制约耕地保护目标实现的关键问题。本文以2009—2023年湖南省86个县域为研究单元,从“空间错位”视角出发,运用空间重心模型、重心耦合模型、空间错位指数及参数最优地理探测器,系统分析“两化”的空间错位特征及驱动机制。研究发现:1)区域耕地利用可持续集约化水平呈“持续向好、稳步攀升”趋势,规模化水平则保持“低增长、低波动”趋势,二者呈弱负相关,规模化对可持续集约化的正向驱动效应尚未显现;2)可持续集约化重心整体向新邵县西北部移动,规模化重心向涟源市东北部移动,二者重心演变呈“远离-靠近-再远离”的交替特征;3)空间错位指数介于−0.815~0.876,时序演化呈“分化减弱-协同提升-局部失衡”特征,空间分布表现为“低效区向均衡区收敛、高效区向优势区集聚”,县域错位类型演化呈异质性,可划分为稳定型、渐进型、倒退型和跳跃型四类;4)农业财政支出、坡度、农村灌溉水平及农业机械化水平为核心驱动因素,各因子之间存在显著交互增强效应,共同影响空间错位的形成与演变。研究结果可为湖南省县域耕地利用系统优化与差异化管理提供科学依据。

     

    Abstract: The spatial mismatch between sustainable intensification and scaling of cultivated land use is a key factor leading to inefficient land resource allocation and constraining cultivated land protection goals. Using 86 counties in Hunan Province from 2009 to 2023 as study units, this paper analyzes the spatial mismatch characteristics and driving mechanisms of the two processes from a spatial mismatch perspective, employing the spatial gravity center model, gravity center coupling model, spatial mismatch index, and an optimal parameter geographical detector. The results indicate that: 1) The level of sustainable intensification shows a continuous and steady increase, while the level of scaling exhibits low growth and low volatility. A weak negative correlation exists between the two processes, and the positive driving effect of scaling on sustainable intensification has not yet emerged. 2) The gravity center of sustainable intensification shifts overall toward the northwest of Xinshao County, whereas that of scaling moves toward the northeast of Lianyuan City, displaying an alternating pattern of separation, convergence, and renewed separation. 3)The spatial mismatch index ranges from −0.815 to 0.876, with temporal evolution characterized by weakening differentiation, enhanced coordination, and localized imbalance. Spatially, inefficient areas converge toward balanced areas, while efficient areas agglomerate into dominant zones. County-level mismatch types exhibit clear heterogeneity and can be classified into four categories: stable, progressive, regressive, and jump types. 4) Agricultural financial expenditure, slope, rural irrigation level, and agricultural mechanization level are the core driving factors, and significant interactive enhancement effects exist among these factors, jointly shaping the formation and evolution of spatial mismatch. These findings provide a scientific basis for optimizing county-level cultivated land use systems and implementing differentiated management strategies in Hunan Province.

     

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