Ecology and Environmental Sciences ›› 2026, Vol. 35 ›› Issue (4): 642-653.DOI: 10.16258/j.cnki.1674-5906.2026.04.014

• Research Article [Environmental Science] • Previous Articles     Next Articles

Spatial Distribution Characteristics and Driving Mechanisms of Cultivated Land Fragmentation in Typical Agricultural Regions of Northern China under Topographic-Economic Synergy

ZHAO Shuang1(), NIE Qianyu1, YUE Ang2,*(), WANG Dongchuan1, SUN Xiaowei3, ZHANG Haotian1, LIU Haotian1, YE Kai1   

  1. 1 Tianjin Chengjian University, Tianjin 300384, P. R. China
    2 Tianjin Eco-Environmental Monitoring Center, Tianjin 300457, P. R. China
    3 Tianjin Institute of Surveying and Mapping Co., Ltd, Tianjin 300381, P. R. China
  • Received:2025-05-29 Revised:2025-10-08 Accepted:2025-11-20 Online:2026-04-18 Published:2026-04-14

地形-经济驱动下北方典型农业区的耕地细碎化空间分布特征及驱动机制

赵爽1(), 聂谦雨1, 岳昂2,*(), 汪东川1, 孙晓玮3, 张昊天1, 刘昊沺1, 叶凯1   

  1. 1 天津城建大学地质与测绘学院天津 300384
    2 天津市生态环境监测中心天津 300457
    3 天津市测绘院有限公司天津 300381
  • 通讯作者: *E-mail: contra050009@163.com
  • 作者简介:赵爽(1989年生),女,讲师,研究方向为遥感图像识别与城市遥感。E-mail: zhaoshuang316@163.com
  • 基金资助:
    国家自然科学基金项目(41971310)

Abstract:

Revealing the spatial distribution patterns and driving factors of cultivated land fragmentation is of great significance for optimizing resource management and maintaining the health of agro-ecological systems. Five typical agricultural regions in northern China—Changping District in Beijing, Binhai New Area in Tianjin, Hulin City in Heilongjiang, Guannan County in Jiangsu, and Shouguang City in Shandong—were selected as the studied areas. Using Landsat8 surface reflectance products from 2020, cultivated land information was extracted based on a random forest algorithm. Seven landscape pattern indices were selected to construct a multidimensional evaluation system to quantify the degree of cultivated land fragmentation. By integrating landscape pattern indices and a multi-scale moving window method, spatial heterogeneity was revealed. Additionally, the optimal parameters-based geographical detector (OPGD) was employed to analyze driving mechanisms and their interactive effects from topographic, economic, and demographic perspectives. The results show that: 1) The spatial heterogeneity of cultivated land fragmentation was significant. Changping District and Binhai New Area exhibited the highest degrees of fragmentation (0.133 and 0.132, respectively), largely due to urban expansion. Hulin City and Shouguang City presented moderate fragmentation levels (0.140 and 0.138, respectively), influenced by terrain undulation and the distribution of facility agriculture, respectively. Guannan County showed the lowest degree of fragmentation (0.142), with a relatively stable cropland pattern. 2) Topographic factors demonstrated strong explanatory power, constituting the dominant driving factors of cultivated land fragmentation. Specifically, elevation showed q-values of 0.284, 0.286, 0.491, and 0.299 in Changping District, Hulin City, Shouguang City and Guannan County, respectively. Slope aspect had a q-value of 0.238 in Binhai New Area. 3) Secondary driving factors exhibited regional differences. GDP was the main influencing factor in Changping District and Binhai New Area, with q-values of 0.379 and 0.536, respectively. In contrast, population density was the primary driver in Hulin City, Guannan County, and Shouguang City, with q-values of 0.391, 0.477, and 0.779, respectively.

Key words: agricultural remote sensing, cultivated land fragmentation, landscape pattern, influencing factors, Northern China

摘要:

揭示耕地细碎化的空间分布及驱动因素,对优化资源管理、维护农业生态健康具有重要意义。以北京市昌平区、天津滨海新区、黑龙江虎林市、江苏灌南县和山东寿光市等5个北方典型农业区为研究区,采用2020年Landsat8地表反射率产品,基于随机森林算法提取耕地信息,并遴选7个景观格局指标构建多维评价体系,量化耕地细碎化程度;结合景观格局指数与多尺度移动窗口法揭示空间分布异质性,并采用参数最优地理探测器,从地形、经济和人口等三方面解析驱动机制及其交互效应。结果表明,1)耕地细碎化的空间分异性显著,昌平区和滨海新区细碎化程度最高(分别为0.133和0.132),受城市扩张的影响显著;虎林市和寿光市处于中等水平(分别为0.140和0.138),受地形起伏与设施农业布局的影响;灌南县综合指数最低(为0.142),耕地格局相对稳定。2)地形因子表现出较强的解释力,构成耕地细碎化的主导驱动因素。其中,高程在昌平区、虎林市、寿光市和灌南县的q值分别为0.284、0.286、0.491和0.299,坡向在滨海新区的q值为0.238。3)次要驱动因素具有区域差异,昌平区和滨海新区主要受GDP的影响,q值分别为0.379和0.536;虎林市、灌南县和寿光市则主要受人口密度的影响,q值分别为0.391、0.477和0.779。

关键词: 农业遥感, 耕地细碎化, 景观格局, 驱动因素, 中国北方

CLC Number: